10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2014

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission File Number: 001-14649

Trex Company, Inc.

(Exact name of registrant as specified in its charter)

Delaware	54-1910453
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
160 Exeter Drive Winchester, Virginia	22603-8605
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (540) 542-6300

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.:

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined by Rule 12b-2 of the Exchange Act):    Yes  ¨    No  x

The number of shares of the registrant’s common stock, par value $.01 per share, outstanding at October 17, 2014 was 32,006,335 shares.

TREX COMPANY, INC.

INDEX

		Page
PART I FINANCIAL INFORMATION
Item 1.	Financial Statements		1
	Condensed Consolidated Balance Sheets as of September 30, 2014 (unaudited) and December 31, 2013		1
	Condensed Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2014 and 2013 (unaudited)		2
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2014 and 2013 (unaudited)		3
	Notes to Condensed Consolidated Financial Statements (unaudited)		4
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		10
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		15
Item 4.	Controls and Procedures		15
PART II OTHER INFORMATION
Item 1.	Legal Proceedings		16
Item 5.	Other Information		16
Item 6.	Exhibits		17

i

PART I

FINANCIAL INFORMATION

Item 1. Financial Statements

TREX COMPANY, INC.

Condensed Consolidated Balance Sheets

(In thousands)

	September 30, 2014			December 31, 2013
	(Unaudited)
Assets
Current assets:
Cash and cash equivalents	$	3,841		$	3,772
Accounts receivable, net		44,977			37,338
Inventories		14,639			22,428
Prepaid expenses and other assets		3,279			3,145
Deferred income taxes		9,497			9,497
Total current assets		76,233			76,180
Property, plant and equipment, net		98,199			100,783
Goodwill and other intangibles		10,536			10,542
Other assets		897			652
Total assets	$	185,865		$	188,157
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	12,864		$	14,891
Accrued expenses		24,275			23,295
Accrued warranty		8,500			9,000
Line of credit		3,000			—
Total current liabilities		48,639			47,186
Deferred income taxes		360			360
Non-current accrued warranty		27,587			31,812
Other long-term liabilities		2,164			2,183
Total liabilities		78,750			81,541
Stockholders’ equity:
Preferred stock, $0.01 par value, 3,000,000 shares authorized; none issued and outstanding		—			—
Common stock, $0.01 par value, 80,000,000 shares authorized; 34,783,546 and 34,598,124 shares issued and 32,003,117 and 33,475,614 shares outstanding at September 30, 2014 and December 31, 2013, respectively		348			173
Additional paid-in capital		115,623			101,667
Retained earnings		66,144			29,776
Treasury stock, at cost, 2,780,429 and 1,122,510 shares at September 30, 2014 and December 31, 2013, respectively		(75,000	)		(25,000	)
Total stockholders’ equity		107,115			106,616
Total liabilities and stockholders’ equity	$	185,865		$	188,157

See Accompanying Notes to Condensed Consolidated

Financial Statements (Unaudited).

1

TREX COMPANY, INC.

Condensed Consolidated Statements of Comprehensive Income

(Unaudited)

(In thousands, except share and per share data)

	Three Months Ended September 30,					Nine Months Ended September 30,
	2014		2013			2014		2013
Net sales	$	95,502	$	72,249		$	317,458	$	278,680
Cost of sales		65,133		72,098			203,897		199,747
Gross profit		30,369		151			113,561		78,933
Selling, general and administrative expenses		15,902		15,375			54,468		58,609
Income (loss) from operations		14,467		(15,224	)		59,093		20,324
Interest expense, net		167		70			791		531
Income (loss) before income taxes		14,300		(15,294	)		58,302		19,793
Provision for income taxes		5,387		4			21,934		298
Net income (loss)	$	8,913	$	(15,298	)	$	36,368	$	19,495
Basic earnings (loss) per common share	$	0.28	$	(0.45	)	$	1.12	$	0.58
Basic weighted average common shares outstanding		31,606,264		33,660,212			32,538,832		33,772,710
Diluted earnings (loss) per common share	$	0.28	$	(0.45	)	$	1.10	$	0.56
Diluted weighted average common shares outstanding		32,008,781		33,660,212			32,966,317		34,506,910
Comprehensive income (loss)	$	8,913	$	(15,298	)	$	36,368	$	19,495

See Accompanying Notes to Condensed Consolidated

Financial Statements (Unaudited).

2

TREX COMPANY, INC.

Condensed Consolidated Statements of Cash Flows

(Unaudited)

(In thousands)

	Nine Months Ended September 30,
	2014			2013
Operating Activities
Net income	$	36,368		$	19,495
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		11,449			12,444
Deferred income taxes		—			(2,991	)
Stock-based compensation		3,672			2,781
Loss on disposal of property, plant and equipment		169			587
Excess tax benefits from stock compensation		(12,677	)		(2,567	)
Other non-cash adjustments		(245	)		(337	)
Changes in operating assets and liabilities:
Accounts receivable		(7,698	)		2,543
Inventories		7,789			6,343
Prepaid expenses and other assets		(415	)		447
Accounts payable		(2,027	)		(4,488	)
Accrued expenses and other liabilities		(3,690	)		16,775
Income taxes receivable/payable		12,630			2,633
Net cash provided by operating activities		45,325			53,665
Investing Activities
Expenditures for property, plant and equipment		(8,794	)		(8,971	)
Proceeds from sales of property, plant and equipment		48			176
Purchase of acquired company, net of cash acquired		(44	)		—
Notes receivable, net		59			78
Net cash used in investing activities		(8,731	)		(8,717	)
Financing Activities
Financing costs		—			(73	)
Borrowings under line of credit		139,000			74,500
Principal payments under line of credit		(136,000	)		(79,500	)
Repurchases of common stock		(52,892	)		(28,445	)
Proceeds from employee stock purchase and option plans		690			3,427
Excess tax benefits from stock compensation		12,677			2,567
Net cash used in financing activities		(36,525	)		(27,524	)
Net increase in cash and cash equivalents		69			17,424
Cash and cash equivalents at beginning of period		3,772			2,159
Cash and cash equivalents at end of period	$	3,841		$	19,583
Supplemental Disclosure:
Cash paid for interest, net of capitalized interest	$	498		$	348
Cash paid for income taxes, net	$	9,342		$	696

See Accompanying Notes to Condensed Consolidated

Financial Statements (Unaudited).

3

TREX COMPANY, INC.

Notes to Condensed Consolidated Financial Statements

For the Nine Months Ended September 30, 2014 and 2013

(Unaudited)

1. BUSINESS AND ORGANIZATION

Trex Company, Inc. (the “Company”) is the world’s largest manufacturer of wood-alternative decking and railing products, which are marketed under the brand name Trex^®. The Company is incorporated in Delaware. The principal executive offices are located at 160 Exeter Drive, Winchester, Virginia 22603, and the telephone number at that address is (540) 542-6300. The Company operates in one business segment.

2. BASIS OF PRESENTATION

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the accompanying condensed consolidated financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. In the opinion of management, all adjustments (consisting of normal and recurring adjustments except as otherwise described herein) considered necessary for a fair presentation have been included in the accompanying condensed consolidated financial statements. Certain prior year amounts in the accompanying condensed consolidated financial statements have been reclassified to conform to the current year presentation. All common stock share and per share data for all historical periods presented have been retroactively adjusted to reflect a two-for-one stock split distributed on May 7, 2014 (see Note 8). The consolidated results of operations for the nine months ended September 30, 2014 are not necessarily indicative of the results that may be expected for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements as of December 31, 2013 and 2012 and for each of the three years in the period ended December 31, 2013 included in the annual report of Trex Company, Inc. on Form 10-K, as filed with the Securities and Exchange Commission.

The Company’s critical accounting policies are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

3. NEW ACCOUNTING STANDARDS

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update 2014-09, “Revenue from Contracts with Customers”. The new standard provides a single, comprehensive model for revenue arising from contracts with customers and supersedes most current revenue recognition guidance. The new standard requires an entity to recognize revenue at an amount that reflects the consideration to which the company expects to be entitled in exchange for transferring goods or services to a customer. The new guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016 and allows for either full retrospective or modified retrospective application. No early adoption is permitted. The Company is currently assessing the impact of the adoption of this new standard on its consolidated financial statements and footnote disclosures.

4. INVENTORIES

Inventories, at LIFO (last-in, first-out) value, consist of the following (in thousands):

	September 30, 2014			December 31, 2013
Finished goods	$	21,494		$	30,423
Raw materials		17,642			16,502
Total FIFO inventories		39,136			46,925
Reserve to adjust inventories to LIFO value		(24,497	)		(24,497	)
Total LIFO inventories	$	14,639		$	22,428

4

Under the LIFO method, reductions in inventory cause a portion of the Company’s cost of sales to be based on historical costs rather than current year costs. An actual valuation of inventory under the LIFO method can be made only at the end of each year based on the inventory levels and costs at that time. Accordingly, interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs. Changes in inventory levels and costs are reflected in the interim financial statements in the period in which they occur, except in cases where LIFO inventory liquidations are expected to be reinstated by the end of the year. There were no LIFO inventory liquidations recognized to cost of sales in the nine months ended September 30, 2014 or 2013. Since inventory levels and costs are subject to factors beyond management’s control, interim results are subject to the final year-end LIFO inventory valuation.

5. ACCRUED EXPENSES

Accrued expenses consist of the following (in thousands):

	September 30, 2014		December 31, 2013
Accrued sales and marketing	$	10,626	$	5,269
Accrued compensation and benefits		7,027		9,135
Accrued rent obligations		2,649		1,787
Accrued manufacturing expenses		1,080		1,107
Accrued legal contingency		158		3,174
Other		2,735		2,823
Total accrued expenses	$	24,275	$	23,295

6. DEBT

The Company’s outstanding debt consists of a revolving credit facility.

Revolving Credit Facility

The Company currently has an Amended Credit Agreement which provides the Company with one or more revolving loans in a collective maximum principal amount of $100 million. On December 17, 2013, the Company entered into a Second Amendment (“Second Amendment”) to the Amended Credit Agreement dated as of January 6, 2012, as amended by the First Amendment dated February 26, 2013 (the “Credit Agreement”). Pursuant to the Second Amendment, the Credit Agreement was amended to temporarily increase the maximum amount of the revolver loans from $100 million to $125 million during the period from January 1, 2014 through and including June 30, 2014 to meet seasonal cash requirements. No other material changes were made to the terms of the Credit Agreement. The maximum amount of the revolver loans reverted to $100 million on July 1, 2014. Pursuant to a Letter Agreement dated October 23, 2014, the termination date of the Credit Agreement was extended to January 9, 2016.

Amounts drawn under the Credit Agreement are subject to a borrowing base consisting of certain accounts receivables, inventories, machinery and equipment and real estate. At September 30, 2014, the Company had $3 million of outstanding borrowings under its revolving credit facility and remaining available borrowing capacity of approximately $63 million.

Compliance with Debt Covenants and Restrictions

The Company’s ability to make scheduled principal and interest payments and to borrow and repay amounts under any outstanding revolving credit facility, and continue to comply with any loan covenants depends primarily on the Company’s ability to generate sufficient cash flow from operations.

As of September 30, 2014, the Company was in compliance with all of the covenants contained in its debt agreements. Failure to comply with the loan covenants might cause lenders to accelerate the repayment obligations under the credit facility, which may be declared payable immediately based on a default.

5

7. FINANCIAL INSTRUMENTS

The Company considers the recorded value of its financial assets and liabilities, consisting primarily of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities to approximate the fair value of the respective assets and liabilities at September 30, 2014 and December 31, 2013.

8. STOCKHOLDERS’ EQUITY

Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except share and per share data):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2014		2013			2014		2013
Numerator:
Net income (loss) available to common shareholders	$	8,913	$	(15,298	)	$	36,368	$	19,495
Denominator:
Basic weighted average shares outstanding		31,606,264		33,660,212			32,538,832		33,772,710
Effect of dilutive securities:
SARs and options		237,602		—			268,016		566,190
Restricted stock		164,915		—			159,469		168,010
Diluted weighted average shares outstanding		32,008,781		33,660,212			32,966,317		34,506,910
Basic earnings (loss) per share	$	0.28	$	(0.45	)	$	1.12	$	0.58
Diluted earnings (loss) per share	$	0.28	$	(0.45	)	$	1.10	$	0.56

Diluted earnings per share is computed using the weighted average number of shares determined for the basic earnings per share computation plus the dilutive effect of common stock equivalents using the treasury stock method. The computation of diluted earnings per share excludes the following potentially dilutive securities because the effect would be anti-dilutive:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Restricted stock and stock options		10,444		407,902		3,511		34,620
Stock appreciation rights		3,340		115,790		2,625		97,540

Stock Split

In February 2014, the Company’s Board of Directors approved a two-for-one stock split of the Company’s common stock, par value $0.01. The stock split was in the form of a stock dividend distributed on May 7, 2014 to stockholders of record at the close of business on April 7, 2014. The stock split entitled each stockholder to receive one additional share of common stock, par value $0.01, for each share they held as of the record date. All common stock share and per share data for all periods presented in the accompanying unaudited condensed consolidated financial statements and notes thereto are presented on a post-split basis. Additionally, on April 30, 2014, the Company’s stockholders approved an amendment to the Company’s Restated Certificate of Incorporation to increase the number of authorized shares of common stock from 40 million to 80 million shares.

Stock Repurchase Programs

In February 2014, the Company’s Board of Directors authorized a common stock repurchase program of up to $50 million of the Company’s outstanding common stock (the “February 2014 Stock Repurchase Program”). This authorization has no expiration date. During the three months ended June 30, 2014, the Company repurchased 1,657,919 shares for $50.0 million at an average price of $30.16 per share, which completed the authorization under the February 2014 Stock Repurchase Program. The share and per share data for the repurchases are reflective of the two-for-one stock split distributed on May 7, 2014.

On October 23, 2014, the Company’s Board of Directors authorized a common stock repurchase program of up to two million shares of the Company’s outstanding common stock (the “October 2014 Stock Repurchase Program”). This authorization has no expiration date.

6

9. STOCK-BASED COMPENSATION

The Company has one stock-based compensation plan, the 2014 Stock Incentive Plan (the “Plan”), approved by the Company’s stockholders in April 2014. The Plan amended and restated in its entirety the Trex Company, Inc. 2005 Stock Incentive Plan. The Plan is administered by the Compensation Committee of the Company’s Board of Directors. Stock-based compensation is granted to officers, directors and certain key employees in accordance with the provisions of the Plan. The Plan provides for grants of stock options, restricted stock, restricted stock units, stock appreciation rights (“SARs”), and unrestricted stock. As of September 30, 2014, the total aggregate number of shares of the Company’s common stock that may be issued under the Plan is 6,420,000.

In 2014, the Company began granting performance-based restricted stock in addition to the time-based restricted stock it previously granted. The performance-based restricted shares have a three-year vesting period, vesting one-third each year based on target earnings before interest, taxes, depreciation and amortization, or “EBITDA”, for 1 year, cumulative 2 years and cumulative 3 years, respectively. With respect to each vesting, the number of shares that will vest will be between 0% and 200% of the target number of shares.

The fair value of each SAR is estimated on the date of grant using a Black-Scholes option-pricing formula. For SARs issued in the nine months ended September 30, 2014 and 2013, respectively, the assumptions shown in the following table were used:

	Nine Months Ended September 30,
	2014			2013
Weighted-average fair value of grants	$	18.02		$	11.68
Dividend yield		0	%		0	%
Average risk-free interest rate		1.7	%		0.7	%
Expected term (years)		5			5
Expected volatility		53	%		64	%

The following table summarizes the Company’s stock-based compensation grants for the nine months ended September 30, 2014:

	Stock Awards Granted		Weighted-Average Grant Price Per Share
Stock appreciation rights		3,623	$	38.17
Time-based restricted stock		66,409	$	32.69
Performance-based restricted stock		42,676	$	33.72

The Company recognizes stock-based compensation expense ratably over the period from the grant date to the earlier of: (1) the vesting date of the award, or (2) the date the grantee is eligible to retire without forfeiting the award. For performance-based restricted stock, expense is recognized ratably over the performance and vesting period of each tranche based on management’s judgment of the ultimate award that is likely to be paid out based on the achievement of the predetermined performance measures. The following table summarizes the Company’s stock-based compensation expense for the three and nine months ended September 30, 2014 and 2013 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Stock appreciation rights	$	222	$	307	$	813	$	945
Time-based restricted stock		769		667		2,247		1,790
Performance-based restricted stock		205		—		570		—
Employee stock purchase plan		21		10		42		46
Total stock-based compensation	$	1,217	$	984	$	3,672	$	2,781

Total unrecognized compensation cost related to unvested awards as of September 30, 2014 was $5.2 million. The cost of these unvested awards is being recognized over the requisite vesting period of each award.

10. INCOME TAXES

As of December 31, 2013, the Company determined that it more likely than not will realize most of its deferred tax assets and, as a result, reversed a significant portion of its valuation allowance. As of September 30, 2014, the Company has a valuation allowance of $4.2 million, primarily related to certain state tax credits the Company estimates will expire before they are realized. The Company analyzes its position in each reporting period, considering all available positive and negative evidence, in determining the expected realization of its deferred tax assets.

7

The Company’s effective tax rate for the nine months ended September 30, 2014 and 2013 was 37.6% and 1.5% respectively, which resulted in expense of $21.9 million and $0.3 million, respectively. The lower effective tax rate for the nine months ended September 30, 2013 was a direct result of the Company maintaining a full valuation allowance against its deferred tax assets.

During the nine months ended September 30, 2014, the Company realized $12.7 million of excess tax benefits from stock-based awards and, accordingly, recorded an increase to additional paid-in capital.

The Company operates in multiple tax jurisdictions and, in the normal course of business, its tax returns are subject to examination by various taxing authorities. Such examinations may result in future assessments by these taxing authorities, and the Company accrues a liability when it believes that it is more likely than not that benefits of tax positions will not be realized. The Company believes that adequate provisions have been made for all tax returns subject to examination. As of September 30, 2014, federal tax years 2011 through 2013 remain subject to examination.

In September 2013, the Internal Revenue Service issued Treasury Decision 9636, which enacted final tax regulations regarding the capitalization and expensing of amounts paid to acquire, produce, or improve tangible property. The regulations also include guidance regarding the retirement of depreciable property. The Company has assessed the impact of the final regulations on its financial statements and does not expect any material adjustments or changes.

11. SEASONALITY

The Company’s operating results have historically varied from quarter to quarter, often attributable to seasonal trends in the demand for Trex^®. The Company has historically experienced lower net sales during the fourth quarter because holidays and adverse weather conditions in certain regions reduce the level of home improvement and construction activity.

12. COMMITMENTS AND CONTINGENCIES

Contract Termination Costs

In anticipation of relocating its corporate headquarters, the Company entered into a lease agreement in 2005. The Company reconsidered and decided not to move its headquarters. The lease obligates the Company to lease 55,047 square feet of office space through June 30, 2019. As of September 30, 2014, the Company has executed subleases for 41,701 square feet of the leased space, 16,969 of which expires on December 31, 2014, and is currently marketing the remaining portion of the space to find a suitable tenant. The Company estimates that the present value of the estimated future sublease receipts, net of transaction costs, will be less than the Company’s remaining minimum lease payment obligations under its lease and has recorded a liability for the expected shortfall. During the nine months ended September 30, 2014, due to revisions to its estimate of future sublease receipts, the Company recorded a charge of $1.0 million to selling, general and administrative expenses.

To estimate future sublease receipts, the Company has assumed that existing subleases will be renewed or new subleases will be executed at rates consistent with rental rates in the current subleases or estimated market rates and that existing vacancies will be filled within one year. However, management cannot be certain that the timing of future subleases or the rental rates contained in future subleases will not differ from current estimates. Factors such as the availability of commercial office space, poor market conditions and subtenant preferences will influence the terms achieved in future subleases. The inability to sublet the office space in the future or unfavorable changes to key management assumptions used in the estimate of the future sublease receipts may result in material charges to selling, general and administrative expenses in future periods.

As of September 30, 2014, the minimum payments remaining under the Company’s lease relating to its reconsidered corporate relocation over the years ending December 31, 2014, 2015, 2016, 2017 and 2018 are $0.4 million, $1.7 million, $1.8 million, $1.8 million and $1.8 million, respectively, and $0.9 million in 2019. The minimum receipts remaining under the Company’s existing subleases over the years ending December 31, 2014, 2015, 2016, 2017 and 2018 are $0.3 million, $0.8 million, $0.7 million, $0.7 million and $0.7 million, respectively, and $0.4 million in 2019.

The following table provides information about the Company’s liability related to the lease (in thousands):

	2014			2013
Beginning balance, January 1	$	1,787		$	1,103
Net rental receipts (payments)		(281	)		(410	)
Accretion of discount		125			61
Increase in net estimated contract termination costs		1,018			1,144
Ending balance, September 30	$	2,649		$	1,898

8

Product Warranty

The Company warrants that its products will be free from material defects in workmanship and materials. This warranty generally extends for a period of 25 years for residential use and 10 years for commercial use. (With respect to TrexTrim™ and Trex Reveal^® Railing, the warranty period is 25 years for both residential and commercial use.) With respect to the Company’s Transcend^®, Enhance^®, Select^® and Universal Fascia product, the Company further warrants that the product will not fade in color more than a certain amount and will be resistant to permanent staining from food substances or mold (provided the stain is cleaned within seven days of appearance). This warranty extends for a period of 25 years for residential use and 10 years for commercial use. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price.

Historically, the Company has not had material numbers of claims submitted or settled under the provisions of its product warranties, with the exception of claims related to material produced at its Nevada facility prior to 2007 that exhibits surface flaking. The Company continues to receive and settle surface flaking claims and maintains a warranty reserve to provide for the settlement of these claims. Estimating the warranty reserve for surface flaking claims requires management to estimate (1) the number of claims to be settled with payment and (2) the average cost to settle each claim, both of which are subject to variables that are difficult to estimate.

To estimate the number of claims to be settled with payment, the Company utilizes actuarial techniques to quantify both the expected number of claims to be received and the percentage of those claims that will ultimately require payment. Estimates for both of these elements (number and percentage of claims that will ultimately require payment) are quantified using a range of assumptions derived from the recent claim count history and the identification of factors influencing the claim counts, including the downward trend in received claims due to the passage of time since production of the suspect material. For each of the various parameters used in the analysis, the assumed values in the actuarial valuation produce results that represent the Company’s best estimate for the ultimate number of claims to be settled with payment. The cost per claim varies due to a number of factors, including the size of affected decks, the type of replacement material used, the cost of production of replacement material and the method of claim settlement.

The Company monitors surface flaking claims activity each quarter for indications that its estimates require revision. Due to extensive use of decks during the summer outdoor season, variances to annual claims expectations are typically more meaningful during the latter part of the fiscal year. Through the third quarter of 2014, the number of claims received was lower than the Company’s expectations, while the average cost per claim was higher than the Company’s expectations for 2014. Based on claims activity experienced during the current year, the Company revised its assumed future number of claims and average cost per claim. The revised assumptions did not result in a change to the Company’s warranty reserve, which as of September 30, 2014, the Company believes is sufficient to cover future surface flaking obligations.

The Company’s analysis is based on currently known facts and a number of assumptions. Projecting future events such as the number of claims to be received, the number of claims that will require payment and the average cost of claims could cause the actual warranty liabilities to be higher or lower than those projected which could materially affect the Company’s financial condition, results of operations or cash flow. The Company estimates that the number of claims received will continue to decline over time and that the average cost per claim will remain relatively stable. If the level of claims received or average cost per claim differs materially from expectations, it could result in additional increases to the warranty reserve and reduced earnings and cash flows in future periods. The Company estimates that a 10% change in the expected number of remaining claims to be settled with payment or the expected cost to settle claims may result in approximately a $3.4 million change in the surface flaking warranty reserve.

The following is a reconciliation of the Company’s surface flaking warranty reserve (in thousands):

	2014			2013
Beginning balance, January 1	$	40,312		$	28,487
Changes in estimates related to pre-existing warranties		—			20,000
Settlements made during the period		(6,647	)		(5,947	)
Ending balance, September 30	$	33,665		$	42,540

The remainder of the Company’s warranty reserve represents amounts accrued for non-surface flaking claims.

Legal Matters

On December 16, 2013, the United States District Court, Northern District of California Court granted final approval of the settlement with the law firm of Hagens Berman Sobol Shapiro LLP, relating to the previously reported class action lawsuit brought on behalf of Dean Mahan, and other named and similarly situated plaintiffs generally which alleged certain defects in

9

the Company’s products relating to mold growth, color fading and color variation. As of the date of this report, the Company has distributed substantially all cash payments and rebate certificates under the settlement. Claimants who were denied relief could appeal Trex’s decision, and the deadline for appeals has now passed. The Company believes that payments to consumers for all relief under the settlement, even after determination of all appeals, will not exceed approximately $1.0 million. In addition to such amount, the Company previously paid $1.8 million related to this litigation, representing payment of attorneys’ fees to class counsel and named plaintiff awards in the nationwide settlement and the settlement of corollary cases brought in Indiana, Kentucky, New Jersey and Michigan, all as previously disclosed.

The Company has other lawsuits, as well as other claims, pending against it which are ordinary routine litigation and claims incidental to the business. Management has evaluated the merits of these other lawsuits and claims, and believes that their ultimate resolution will not have a material effect on the Company’s consolidated financial condition, results of operations, liquidity or competitive position.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following management discussion should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2013 filed with the Securities and Exchange Commission and the condensed consolidated financial statements and the footnotes thereto included in Part I, Item 1. “Financial Statements” of this quarterly report.

NOTE ON FORWARD-LOOKING STATEMENTS

This management’s discussion and analysis contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements regarding our expected financial position and operating results, our business strategy, our financing plans, forecasted demographic and economic trends relating to our industry and similar matters are forward-looking statements. These statements can sometimes be identified by our use of forward-looking words such as “may,” “will,” “anticipate,” “estimate,” “expect,” “intend” or similar expressions. We cannot promise you that our expectations in such forward-looking statements will turn out to be correct. Our actual results could be materially different from our expectations because of various factors, including the factors discussed under “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2013 filed with the Securities and Exchange Commission. These statements are also subject to risks and uncertainties that could cause the Company’s actual operating results to differ materially. Such risks and uncertainties include, but are not limited to, the extent of market acceptance of the Company’s products; the costs associated with the development and launch of new products and the market acceptance of such new products; the sensitivity of the Company’s business to general economic conditions; the impact of seasonal and weather-related demand fluctuations on inventory levels in the distribution channel and sales of the Company’s products; the Company’s ability to obtain raw materials at acceptable prices; the Company’s ability to maintain product quality and product performance at an acceptable cost; the level of expenses associated with product replacement and consumer relations expenses related to product quality; and the highly competitive markets in which the Company operates.

OVERVIEW

General. Trex Company, Inc. is the world’s largest manufacturer of wood-alternative decking and railing products, which are marketed under the brand name Trex ^®. We offer a comprehensive set of aesthetically durable, low maintenance product offerings and believe that the range and variety of our product offerings allow consumers to design much of their outdoor living space using Trex brand products.

We offer the following products:

• Three principal decking products: Trex Transcend^®, Trex Enhance^®, and Trex Select^®;

• Three principal railing products: Trex Transcend Railing, Trex Select Railing, and Trex Reveal^® aluminum railing;

• One porch product, Trex Transcend Porch Flooring and Railing System;

• One steel deck framing system, Trex Elevations^®;

• One fencing product, Trex Seclusions^®;

• Two outdoor lighting systems, Trex Deck Lighting™ and Trex Landscape Lighting™; and,

• One cellular PVC outdoor trim product, TrexTrim™.

In addition, we offer Trex Hideaway^®, which is a hidden fastening system for specially grooved boards.

10

Highlights related to the third quarter of 2014 include:

• Net sales of $95.5 million in the third quarter of 2014, an increase of 32.2% compared to the third quarter of 2013 and the highest third quarter sales in our history. Year-to-date 2014 net sales were 13.9% higher than in the comparable 2013 period and the highest net sales in the first nine-months of any year in our history.

• Gross margins of 31.8% in the quarter compared to 27.9%, excluding the impact of the increase to the surface flaking warranty reserve, in the third quarter of 2013.

• Net income of $8.9 million, or $0.28 per diluted share, during the quarter. Year-to-date 2014 net income was $36.4 million, the highest net income in the first nine-months of any year in our history.

Net Sales. Net sales consists of sales and freight, net of returns and discounts. The level of net sales is principally affected by sales volume and the prices paid for Trex products. Our branding and product differentiation strategy enables us to command premium prices over wood products. Our operating results have historically varied from quarter to quarter, often due to seasonal trends in the demand for Trex. We have historically experienced lower net sales during the fourth quarter because holidays and adverse weather conditions in certain regions reduce the level of home improvement and construction activity.

Sales Incentives / Early Buy Program: As part of our normal business practice and consistent with industry practices, we have historically provided our distributors and dealers incentives to build inventory levels before the start of the prime deck-building season to ensure adequate availability of product to meet anticipated seasonal consumer demand and to enable production planning. These incentives, which together we reference as our “early buy program,” include payment discounts and favorable payment terms. In addition, from time to time we may offer price discounts or volume rebates on specified products and other incentives based on increases in purchases as part of specific promotional programs.

We launched our early buy program for the 2014 decking season in December 2013. The timing and terms of the 2014 program were generally consistent with the timing and terms of the 2013 program launched in December 2012. To qualify for early buy program incentives, customers must commit to the terms of the program which specify eligible products and quantities, order deadlines and available terms, discounts and rebates. Early Buy shipments in December 2013 were higher than in December 2012 due, in part, to additions to our distribution network, an increase in demand for our products and a revamped pricing strategy. There are no product return rights granted to our distributors except those granted pursuant to the warranty provisions of our agreements with distributors. In addition, our products are not susceptible to rapid changes in technology that may cause them to become obsolete. The early buy program can have a significant impact on our sales, receivables and inventory levels. Refer to the liquidity and capital resources section for further discussion of significant impacts on our receivables and inventory levels.

Gross Profit. Gross profit represents the difference between net sales and cost of sales. Cost of sales consists of raw materials costs, direct labor costs, manufacturing costs and freight. Raw materials costs generally include the costs to purchase and transport waste wood fiber, reclaimed polyethylene, or “PE material,” and pigmentation for coloring Trex products. Direct labor costs include wages and benefits of personnel engaged in the manufacturing process. Manufacturing costs consist of costs of depreciation, utilities, maintenance supplies and repairs, indirect labor, including wages and benefits, and warehouse and equipment rental activities.

Product Warranty. We continue to receive and settle claims related to material produced at our Nevada facility prior to 2007 that exhibits surface flaking and maintain a warranty reserve to provide for the settlement of these claims. We monitor surface flaking claims activity each quarter for indications that our estimates require revision. Due to extensive use of decks during the summer outdoor season, variances to annual claims expectations are typically more meaningful during the latter part of the fiscal year. Through the third quarter of 2014, the number of claims received was lower than our expectations, while the average cost per claim was higher than our expectations for 2014. Based on claims activity experienced during the current year, we revised our assumed future number of claims and average cost per claim. The revised assumptions did not result in a change to our warranty reserve, which as of September 30, 2014, we believe is sufficient to cover future surface flaking obligations.

The following table details surface flaking claims activity related to our warranty:

	Nine Months Ended September 30,
	2014			2013
Claims unresolved, beginning of period		4,249			4,073
Claims received (1)		2,765			3,639
Claims resolved (2)		(3,497	)		(3,008	)
Claims unresolved, end of period		3,517			4,704
Average cost per claim (3)	$	2,270		$	2,273

(1) Claims received include new claims received or identified during the period.

11

(2) Claims resolved include all claims settled with or without payment and closed during the period.

(3) Average cost per claim represents, for claims closed during the period, the average settlement cost of claims closed with payment (excludes claims settled without payment).

Selling, General and Administrative Expenses. The largest component of selling, general and administrative expenses is personnel related costs, which include salaries, commissions, incentive compensation, and benefits of personnel engaged in sales and marketing, accounting, information technology, corporate operations, research and development, and other business functions. Another component of selling, general and administrative expenses is branding and other sales and marketing costs, which are used to build brand awareness of Trex. These costs consist primarily of advertising, merchandising, and other promotional costs. Other general and administrative expenses include professional fees, office occupancy costs attributable to the business functions previously referenced, and consumer relations expenses. As a percentage of net sales, selling, general and administrative expenses have varied from quarter to quarter due, in part, to the seasonality of our business.

Stock Split. In February 2014, our Board of Directors approved a two-for-one stock split of our common stock, par value $0.01. The stock split was in the form of a stock dividend distributed on May 7, 2014 to stockholders of record at the close of business on April 7, 2014. The stock split entitled each stockholder to receive one additional share of common stock, par value $0.01, for each share they held as of the record date. All common stock share and per share data for all periods presented in this Quarterly Report on Form 10-Q are presented on a post-split basis.

RESULTS OF OPERATIONS

The following table shows, for the three and nine months ended September 30, 2014 and 2013, respectively, selected statement of comprehensive income data as a percentage of net sales:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Net sales		100.0	%		100.0	%		100.0	%		100.0	%
Cost of sales		68.2			99.8			64.2			71.7
Gross profit		31.8			0.2			35.8			28.3
Selling, general and administrative expenses		16.7			21.3			17.2			21.0
Income (loss) from operations		15.1			(21.1	)		18.6			7.3
Interest expense, net		0.2			0.1			0.2			0.2
Income (loss) before income taxes		14.9			(21.2	)		18.4			7.1
Provision for income taxes		5.6			0.0			6.9			0.1
Net income (loss)		9.3	%		(21.2	)%		11.5	%		7.0	%

Three Months Ended September 30, 2014 Compared With Three Months Ended September 30, 2013

Net Sales. Net sales in the quarter ended September 30, 2014 (the “2014 quarter”) increased $23.3 million, or 32.2% to $95.5 million from $72.2 million in the quarter ended September 30, 2013 (the “2013 quarter”). The increase in net sales was due to a 36.1% increase in sales volumes, partially offset by a 3.9% decrease in the average price per unit. We attribute the increase in sales volumes in the 2014 quarter compared to the 2013 quarter primarily to a stronger demand from existing dealers and additions to our distribution network subsequent to the 2013 quarter. The decrease in average price per unit in the 2014 quarter was primarily attributable to our revamped pricing strategy implemented in the fourth quarter of 2013.

Gross Profit. Gross profit increased $30.2 million to $30.4 million in the 2014 quarter from $0.2 million in the 2013 quarter. Gross profit was adversely affected in the 2013 quarter by a $20.0 million charge related to increasing the previously established surface flaking warranty reserve. Excluding the aforementioned charge in the 2013 quarter, gross profit increased 50.7% to $30.4 million in the 2014 quarter compared to $20.2 million in the 2013 quarter. Excluding the aforementioned charge in the 2013 quarter, gross profit as a percentage of net sales, gross margin, increased to 31.8% in the 2014 quarter from 27.9% in the 2013 quarter. The increase in gross margin was primarily the result of favorable manufacturing efficiencies, capacity utilization and sales mix, partially offset by the aforementioned revamped pricing strategy.

Selling, General and Administrative Expenses. Selling, general and administrative expenses increased $0.5 million, or 3.4% to $15.9 million in the 2014 quarter from $15.4 million in the 2013 quarter. The increase in the 2014 quarter compared to the 2013 quarter was primarily driven by the following factors:

• $0.9 million higher branding spend due primarily to the timing of spend;

• a $0.5 million increase in personnel-related expenses primarily attributable to the timing of incentive compensation;

• partially offset by $0.8 million lower contract termination costs related to our 2005 reconsidered corporate headquarters lease.

12

As a percentage of net sales, total selling, general and administrative expenses decreased to 16.7% in the 2014 quarter from 21.3% in the 2013 quarter.

Interest Expense. Net interest expense increased $0.1 million to $0.2 million in the 2014 quarter from $0.1 million in the 2013 quarter. The increase was driven by higher debt balances under the revolving credit facility in the 2014 quarter compared to the 2013 quarter. As a percentage of net sales, interest expense increased to 0.2% in the 2014 quarter from 0.1% in 2013 quarter.

Provision for Income Taxes. The effective tax rate for the 2014 quarter and 2013 quarter was 37.6% and 0.0%, respectively, which resulted in expense of $5.4 million and $4 thousand for the respective quarters. The effective tax rate was substantially lower in the 2013 quarter due to the effect of the valuation allowance we maintained against our net deferred tax assets which substantially offset statutory income tax.

Nine Months Ended September 30, 2014 Compared With Nine Months Ended September 30, 2013

Net Sales. Net sales in the nine months ended September 30, 2014 (the “2014 nine-month period”) increased $38.8 million, or 13.9% to $317.5 million from $278.7 million in the nine months ended September 30, 2013 (the “2013 nine-month period”). The increase in net sales was attributable to a 17.3% increase in sales volumes, partially offset by a 3.4% decrease in the average price per unit. We attribute the increase in sales volumes in the 2014 nine-month period compared to the 2013 nine-month period primarily to a strong demand from both new and existing dealers. The decrease in average price per unit in the 2014 nine-month period was primarily attributable to our revamped pricing strategy implemented in the fourth quarter of 2013.

Gross Profit. Gross profit increased 43.9% to $113.6 million in the 2014 nine-month period from $78.9 million in the 2013 nine-month period. Gross profit in the 2013 nine-month period was adversely affected by a $20.0 million charge related to increasing the previously established surface flaking warranty reserve. Excluding the aforementioned charge in the 2013 nine-month period, gross profit increased 14.8% to $113.6 million in the 2014 nine-month period compared to $98.9 million in the 2013 nine-month period. Excluding the aforementioned charge in the 2013 nine-month period, gross profit as a percentage of net sales, gross margin, increased to 35.8% in the 2014 nine-month period from 35.5% in the 2013 nine-month period. The increase in gross margin was primarily the result favorable manufacturing efficiencies, capacity utilization and sales mix, partially offset by the aforementioned revamped pricing strategy.

Selling, General and Administrative Expenses. Selling, general and administrative expenses decreased $4.1 million, or 7.1% to $54.5 million in the 2014 nine-month period from $58.6 million in the 2013 nine-month period. The decrease in the 2014 nine-month period compared to the 2013 nine-month period was primarily driven by the following factors:

• a $1.8 million reduction in costs related to the mold growth class action lawsuit that was settled in December 2013;

• $1.5 million lower branding spend due mainly to cost reduction initiatives; and,

• a $0.8 million decrease in personnel-related expenses primarily attributable to decreased incentive compensation.

As a percentage of net sales, total selling, general and administrative expenses decreased to 17.2% in the 2014 nine-month period from 21.0% in the 2013 nine-month period.

Interest Expense. Net interest expense increased $0.3 million to $0.8 million in the 2014 nine-month period from $0.5 million in the 2013 nine-month period. The increase was driven by higher debt balances under the revolving credit facility in the 2014 nine-month period compared to the 2013 nine-month period. As a percentage of net sales, interest expense was 0.2% in both the 2014 and 2013 nine-month periods.

Provision for Income Taxes. The effective tax rate for the 2014 and 2013 nine-month periods was 37.6% and 1.5%, respectively, which resulted in an expense of $21.9 million and $0.3 million, in the respective nine-month periods. The effective tax rate was substantially lower in the 2013 nine-month period due to the effect of the valuation allowance we maintained against our net deferred tax assets which substantially offset statutory income tax.

LIQUIDITY AND CAPITAL RESOURCES

We finance operations and growth primarily with cash flow from operations, borrowings under our revolving credit facility, operating leases and normal trade credit terms from operating activities.

At September 30, 2014, we had $3.8 million of cash and cash equivalents.

13

Sources and Uses of Cash. Cash provided by operating activities for the 2014 nine-month period was $45.3 million compared to $53.7 million for the 2013 nine-month period. The $8.4 million decrease was primarily due to unfavorable changes in cash flows related to accounts receivable balances and significantly higher income taxes paid in the 2014 nine-month period compared to the 2013 nine-month period. The accounts receivable balance at the end of the 2014 nine-month period was higher than at the end of the 2013 nine-month period due to increased sales during the third quarter of 2014. We expect to collect all outstanding accounts receivable balances by the end of 2014. The increased payments for income taxes during the 2014 nine-month period result from increased taxable income that exceeds available net operating loss carryforwards.

Cash used in investing activities totaled $8.7 million in both the 2014 and the 2013 nine-month periods. Capital expenditures in the 2014 nine-month period totaled $8.8 million related to new poly processing lines and continued retrofitting to our current production lines to support the manufacture of our high-performance products.

Cash used in financing activities was $36.5 million in the 2014 nine-month period compared to $27.5 million in the 2013 nine-month period. The $9.0 million increase in the 2014 nine-month period was primarily due to an increase in repurchases of our outstanding common stock under stock repurchase programs authorized by the Board of Directors. During the 2014 nine-month period, we repurchased $50.0 million of our outstanding common stock using cash on hand and borrowings from our revolving credit facility. During the 2013 nine-month period, we used cash on hand to repurchase $25.0 million of our outstanding common stock. Cash flow in the 2014 nine-month period was favorably affected by $12.7 million of excess tax benefits related to stock-based awards compared to $2.6 million in the 2013 nine-month period.

On October 23, 2014, our Board of Directors authorized a common stock repurchase program of up to two million shares of our outstanding common stock (the “October 2014 Stock Repurchase Program”). This authorization has no expiration date.

Capital Requirements. Capital expenditures in the 2014 nine-month period totaled $8.8 million related to new poly processing lines and continued retrofitting to our current production lines to support the manufacture of our high-performance products. We currently estimate that our capital expenditures in 2014 will be approximately $20 million.

Indebtedness. At September 30, 2014, our indebtedness totaled $3 million, and the interest rate on our revolving credit facility was 1.9%.

On December 17, 2013, we amended our revolving credit facility to temporarily increase the maximum amount of the revolving loans from $100 million to $125 million during the period from January 1, 2014 through and including June 30, 2014 to meet seasonal cash requirements. The maximum amount of the revolver loans reverted to $100 million on July 1, 2014. Pursuant to a Letter Agreement dated October 23, 2014, the termination date of our revolving credit facility was extended to January 9, 2016.

Our ability to borrow under our revolving credit facility is tied to a borrowing base that consists of certain accounts receivables, inventories, machinery and equipment and real estate. At September 30, 2014, we had $3 million of outstanding borrowings under the revolving credit facility and remaining available borrowing capacity of approximately $63 million.

Debt Covenants. To remain in compliance with covenants contained within our debt agreements, we must maintain specified financial ratios based on levels of debt, capital, net worth, fixed charges, and earnings before interest, taxes, depreciation and amortization. At September 30, 2014, we were in compliance with these covenants. Failure to comply with our loan covenants might cause our lenders to accelerate our repayment obligations under our credit facility, which may be declared payable immediately based on a default.

We believe that cash on hand, cash from operations and borrowings expected to be available under our revolving credit facility will provide sufficient funds to fund planned capital expenditures, make scheduled principal and interest payments, fund warranty payments and meet other cash requirements. We currently expect to fund future capital expenditures from operations and financing activities. The actual amount and timing of future capital requirements may differ materially from our estimate depending on the demand for Trex and new market developments and opportunities.

14

Inventory in Distribution Channels. We sell our products through a tiered distribution system. We have approximately 20 distributors and two mass merchandisers to which we sell our products. The distributors in turn sell the products to approximately 3,700 dealers who in turn sell the products to end users. While we do not typically receive information regarding inventory in the distribution channel from dealers, we occasionally receive limited information from some but not all of our distributors regarding their inventory. Because few distributors provide us with any information regarding their inventory, we cannot definitively determine the level of inventory in the distribution channels at any time. We believe that distributor inventory levels as of September 30, 2014 are comparable to distributor inventory levels as of September 30, 2013. Significant changes in inventory levels in the distribution channel without a corresponding change in end-use demand could have an adverse effect on future sales.

Product Warranty. We continue to receive and settle claims related to material produced at our Nevada facility prior to 2007 that exhibits surface flaking, which has had a material adverse effect on cash flow from operations. We estimate that the number of claims received will continue to decline over time and that the average cost per claim will remain relatively stable. If the level of claims received or average cost per claim differs materially from our expectations, it could result in additional increases to the warranty reserve and reduced earnings and cash flow in future periods.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

For information regarding our exposure to certain market risks, see “Quantitative and Qualitative Disclosures about Market Risk,” in Part II, Item 7A of the Company’s 10-K for the year ended December 31, 2013. There were no material changes to the Company’s market risk exposure during the nine months ended September 30, 2014.

Item 4. Controls and Procedures

The Company’s management, with the participation of its Chief Executive Officer, who is the Company’s principal executive officer, and its Senior Vice President and Chief Financial Officer, who is the Company’s principal financial officer, has evaluated the effectiveness of the Company’s disclosure controls and procedures as of September 30, 2014. Based on this evaluation, the Chief Executive Officer and the Chief Financial Officer have concluded that the Company’s disclosure controls and procedures are effective. In addition, there have been no changes in the Company’s internal control over financial reporting during the quarter ended September 30, 2014 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

15

PART II

OTHER INFORMATION

Item 1. Legal Proceedings

On December 16, 2013, the United States District Court, Northern District of California Court granted final approval of the settlement with the law firm of Hagens Berman Sobol Shapiro LLP, relating to the previously reported class action lawsuit brought on behalf of Dean Mahan, and other named and similarly situated plaintiffs generally which alleged certain defects in the Company’s products relating to mold growth, color fading and color variation. As of the date of this report, the Company has distributed substantially all cash payments and rebate certificates under the settlement. Claimants who were denied relief could appeal Trex’s decision, and the deadline for appeals has now passed. The Company believes that payments to consumers for all relief under the settlement, even after determination of all appeals, will not exceed approximately $1.0 million. In addition to such amount, the Company previously paid $1.8 million related to this litigation, representing payment of attorneys’ fees to class counsel and named plaintiff awards in the nationwide settlement and the settlement of corollary cases brought in Indiana, Kentucky, New Jersey and Michigan, all as previously disclosed.

The Company has other lawsuits, as well as other claims, pending against it which are ordinary routine litigation and claims incidental to the business. Management has evaluated the merits of these other lawsuits and claims, and believes that their ultimate resolution will not have a material effect on the Company’s consolidated financial condition, results of operations, liquidity or competitive position.

Item 5. Other Information

On October 23, 2014, the Company, as borrower; Branch Banking and Trust Company, as Administrative Agent and as a Lender; and Wells Fargo Capital Finance, LLC, as a Lender; entered into a Letter Agreement with respect to their Amended and Restated Credit Agreement dated as of January 6, 2012, as amended, (the “Credit Agreement”). The Letter Agreement extended the termination date of the Credit Agreement to January 9, 2016. No other material changes were made to the terms of the Credit Agreement.

16

Item 6. Exhibits

The Company files herewith the following exhibits:

3.1	Restated Certificate of Incorporation of Trex Company, Inc. (the “Company”). Filed as Exhibit 3.1 to the Company’s Registration Statement on Form S-1 (No. 333-63287) and incorporated herein by reference.
3.2	Certificate of Amendment to the Restated Certificate of Incorporation of Trex Company, Inc. dated April 30, 2014. Filed as Exhibit 3.2 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2014 and incorporated herein by reference.
3.3	Amended and Restated By-Laws of the Company. Filed as Exhibit 3.2 to the Company’s Current Report on Form 8-K filed May 7, 2008 and incorporated herein by reference.
4.1	Letter Agreement dated October 23, 2014 to Amended and Restated Credit Agreement dated as of January 6, 2012, as amended, between the Company and Branch Banking and Trust Company, as a Lender and Administrative Agent, and Wells Fargo Capital Finance, LLC as a Lender. Filed herewith.
31.1	Certification of Chief Executive Officer of Trex Company, Inc. pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. Filed herewith.
31.2	Certification of Chief Financial Officer of Trex Company, Inc. pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. Filed herewith.
32	Certifications pursuant to Rule 13a-14(b) under the Securities Exchange Act of 1934 and 18 U.S.C. § 1350. Filed herewith.
101.INS	XBRL Instance Document. Filed herewith.
101.SCH	XBRL Taxonomy Extension Schema Document. Filed herewith.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document. Filed herewith.
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document. Filed herewith.
101.LAB	XBRL Taxonomy Extension Label Linkbase Document. Filed herewith.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document. Filed herewith.

17

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	TREX COMPANY, INC.
Date: October 27, 2014	By:	/s/ James E. Cline
		James E. Cline
		Senior Vice President and Chief Financial Officer
		(Duly Authorized Officer and Principal Financial Officer)

EXHIBIT INDEX

Exhibit Number	Exhibit Description
3.1	Restated Certificate of Incorporation of Trex Company, Inc. (the “Company”). Filed as Exhibit 3.1 to the Company’s Registration Statement on Form S-1 (No. 333-63287) and incorporated herein by reference.
3.2	Certificate of Amendment to the Restated Certificate of Incorporation of Trex Company, Inc. dated April 30, 2014. Filed as Exhibit 3.2 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2014 and incorporated herein by reference.
3.3	Amended and Restated By-Laws of the Company. Filed as Exhibit 3.2 to the Company’s Current Report on Form 8-K filed May 7, 2008 and incorporated herein by reference.
4.1	Letter Agreement dated October 23, 2014 to Amended and Restated Credit Agreement dated as of January 6, 2012, as amended, between the Company and Branch Banking and Trust Company, as a Lender and Administrative Agent, and Wells Fargo Capital Finance, LLC as a Lender. Filed herewith.
31.1	Certification of Chief Executive Officer of Trex Company, Inc. pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. Filed herewith.
31.2	Certification of Chief Financial Officer of Trex Company, Inc. pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. Filed herewith.
32	Certifications pursuant to Rule 13a-14(b) under the Securities Exchange Act of 1934 and 18 U.S.C. § 1350. Filed herewith.
101.INS	XBRL Instance Document. Filed herewith.
101.SCH	XBRL Taxonomy Extension Schema Document. Filed herewith.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document. Filed herewith.
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document. Filed herewith.
101.LAB	XBRL Taxonomy Extension Label Linkbase Document. Filed herewith.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document. Filed herewith.

EX-4.1

Exhibit 4.1

October 23, 2014

Trex Company, Inc.

160 Exeter Drive

Winchester, VA 22603

Attention: Jim Cline, Chief Financial Officer

Re: Extension of Stated Termination Date

Dear Jim:

Reference is made to the Amended and Restated Credit Agreement dated as of January 6, 2012, as amended (the “Credit Agreement”), among Trex Company, Inc. (the “Borrower”), the lenders party thereto (each, a “Lender” and, collectively, the “Lenders”), Branch Banking and Trust Company, as Administrative Agent (in such capacity, the “Administrative Agent”), and certain other named parties. Capitalized terms used and not otherwise defined herein shall have the meanings assigned to them in the Credit Agreement.

Subject to satisfaction in full of the conditions set forth below, the Lenders hereby agree to extend the “Stated Termination Date” set forth in Section 1.01 of the Credit Agreement from January 9, 2015, to January 9, 2016.

As a condition precedent to the effectiveness of this letter agreement and the extension of the Stated Expiration Date as set forth above, the Administrative Agent shall have received, for the account of the Lenders, an extension fee in the amount of $10,000, which extension fee (a) shall be divided equally between BB&T and Wells Fargo, and (b) shall be deemed fully-earned and non-refundable once paid.

The Borrower further acknowledges and agrees that, in the event the Obligations are not refinanced or otherwise paid and performed in full on or prior to January 9, 2015, (i) the Borrower shall pay to the Administrative Agent, for the ratable account each Lender, an additional extension fee in an amount equal to 0.10% of each Lender’s Revolver Commitment, which additional extension fee (a) shall be payable on demand, and (b) shall be deemed fully-earned and non-refundable once paid, (ii) the Lenders shall have the right to obtain and review updated machinery and equipment appraisals conducted by an appraisal firm selected by or otherwise satisfactory to the Lenders, (iii) the Lenders shall have the right to obtain and review an updated inventory appraisal conducted by an appraisal firm selected by or otherwise satisfactory to the Lenders, and (iv) the Lenders or their respective designees shall have the right to perform a field examination of the Collateral. If the Borrower fails to comply with any of the obligations set forth in this paragraph then such event shall constitute an Event of Default under the Credit Agreement.

As a further condition to the effectiveness of this letter agreement and the extension of the Stated Expiration Date as set forth above, please sign and return a copy of this letter agreement to me by electronic mail (mrush@bbandt.com) or by facsimile (336-733-2740), which the Borrower, the Administrative Agent and the Lenders acknowledge and agree will be treated the same as if this consent letter were physically delivered to the Administrative Agent with original hand-written signatures of the Borrower and the Lenders. Unless a copy of this letter agreement, signed by the Borrowers and the Lenders, is returned to the Administrative Agent by 12:00 noon on December 31, 2014, the offer to extend the Stated Expiration Date as set forth above shall terminate and this letter agreement shall be of no further force or effect; provided that the Borrower shall not be entitled to any refund of the extension fee or any other costs or fees paid by the Borrower in connection herewith.

This letter agreement may be executed in any number of counterparts, each of which shall be an original, but all of which taken together shall constitute one and the same instrument.

Very truly yours,
BRANCH BANKING AND TRUST COMPANY,   as Administrative Agent and a Lender
By:	/s/ Matthew W. Rush
Name:	Matthew W. Rush
Title:	Senior Vice President

[Signatures continue on following page]

ACKNOWLEDGED AND AGREED THIS 23 DAY OF OCTOBER, 2014:

WELLS FARGO CAPITAL FINANCE, LLC   as a Lender
By:	/s/ Zachary S. Buchanan
Name:	Zachary S. Buchanan
Title:	Assistant Vice President

ACCEPTED AND AGREED THIS 23 DAY OF OCTOBER, 2014:

TREX COMPANY, INC.,   a Delaware corporation
By:	/s/ James E. Cline
Name:	James E. Cline
Title:	Senior Vice President and Chief Financial Officer

2

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Ronald W. Kaplan, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Trex Company, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 27, 2014

/s/ Ronald W. Kaplan

Ronald W. Kaplan

Chairman, President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, James E. Cline, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Trex Company, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent function(s)):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 27, 2014

/s/ James E. Cline

James E. Cline

Senior Vice President and Chief Financial Officer (Principal Financial Officer)

EX-32

Exhibit 32

Written Statement of Chief Executive Officer and Chief Financial Officer

Pursuant to Section 906

of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350)

The undersigned, the President and Chief Executive Officer and the Senior Vice President and Chief Financial Officer of Trex Company, Inc. (the “Company”), each hereby certifies that, on the date hereof:

(a) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2014 filed on the date hereof with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: October 27, 2014	/s/ Ronald W. Kaplan
	Ronald W. Kaplan
	Chairman, President and Chief Executive Officer
Date: October 27, 2014	/s/ James E. Cline
	James E. Cline
	Senior Vice President and Chief Financial Officer

XML

Commitments and Contingencies - Summary of Liability Related to Lease (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]
Beginning balance	$ 1,787	$ 1,103
Net rental receipts (payments)	(281)	(410)
Accretion of discount	125	61
Increase in net estimated contract termination costs	1,018	1,144
Ending balance	$ 2,649	$ 1,898

XML

Stock-Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock based compensation plans	1
Unrecognized compensation cost related to unvested awards	$ 5.2
2014 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total aggregate number of shares of common stock that may be issued	6,420,000
Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
Share-Based Compensation Award, Tranche One [Member] | Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based Compensation vesting percentage	33.33%
Share-Based Compensation Award, Tranche Two [Member] | Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based Compensation vesting percentage	33.33%
Share-Based Compensation Award, Tranche Three [Member] | Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based Compensation vesting percentage	33.33%
Minimum [Member] | Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target number of shares that will vest	0.00%
Maximum [Member] | Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target number of shares that will vest	200.00%

XML

Basis of Presentation - Additional Information (Detail)	0 Months Ended
	May 07, 2014
Accounting Policies [Abstract]
Retroactively adjusted stock split	2

XML

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Examination [Line Items]
Valuation allowance	$ 4,200,000		$ 4,200,000
Effective tax rate			37.60%	1.50%
Income tax expense	5,387,000	4,000	21,934,000	298,000
Excess tax benefits from stock-based awards			$ 12,700,000
Earliest Tax Year [Member] | Federal Tax Jurisdiction [Member]
Income Tax Examination [Line Items]
Years subject to income tax examination			2011
Latest Tax Year [Member] | Federal Tax Jurisdiction [Member]
Income Tax Examination [Line Items]
Years subject to income tax examination			2013

XML

Inventories

9 Months Ended

Sep. 30, 2014

Inventory Disclosure [Abstract]

Inventories

4. INVENTORIES

Inventories, at LIFO (last-in, first-out) value, consist of the following (in thousands):

	September 30, 2014			December 31, 2013
Finished goods	$	21,494		$	30,423
Raw materials		17,642			16,502
Total FIFO inventories		39,136			46,925
Reserve to adjust inventories to LIFO value		(24,497	)		(24,497	)
Total LIFO inventories	$	14,639		$	22,428

Under the LIFO method, reductions in inventory cause a portion of the Company’s cost of sales to be based on historical costs rather than current year costs. An actual valuation of inventory under the LIFO method can be made only at the end of each year based on the inventory levels and costs at that time. Accordingly, interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs. Changes in inventory levels and costs are reflected in the interim financial statements in the period in which they occur, except in cases where LIFO inventory liquidations are expected to be reinstated by the end of the year. There were no LIFO inventory liquidations recognized to cost of sales in the nine months ended September 30, 2014 or 2013. Since inventory levels and costs are subject to factors beyond management’s control, interim results are subject to the final year-end LIFO inventory valuation.

XML

Debt - Additional Information (Detail) (USD $)			0 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Revolving Credit Facility [Member]	Oct. 23, 2014 Revolving Credit Facility [Member] Subsequent Event [Member]	Dec. 17, 2013 Revolving Credit Facility [Member] Revolver Loans Second Amendment Portion Effective January 1, 2014 [Member]	Dec. 17, 2013 Revolving Credit Facility [Member] Revolver Loans Second Amendment Portion Effective July 1, 2014 [Member]	Sep. 30, 2014 Revolving Credit Facility [Member] Revolver Loans [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount				$ 125,000,000	$ 100,000,000	$ 100,000,000
Termination date of the Credit Agreement			Jan. 09, 2016
Remaining available borrowing capacity		63,000,000
Outstanding borrowings under its revolving credit facility	$ 3,000,000	$ 3,000,000

XML

Accrued Expenses - Summary of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Accrued sales and marketing	$ 10,626	$ 5,269
Accrued compensation and benefits	7,027	9,135
Accrued rent obligations	2,649	1,787
Accrued manufacturing expenses	1,080	1,107
Accrued legal contingency	158	3,174
Other	2,735	2,823
Total accrued expenses	$ 24,275	$ 23,295

XML

Stockholders' Equity - Computation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator:
Net income (loss) available to common shareholders	$ 8,913	$ (15,298)	$ 36,368	$ 19,495
Denominator:
Basic weighted average shares outstanding	31,606,264	33,660,212	32,538,832	33,772,710
Effect of dilutive securities:
SARs and options	237,602		268,016	566,190
Restricted stock	164,915		159,469	168,010
Diluted weighted average shares outstanding	32,008,781	33,660,212	32,966,317	34,506,910
Basic earnings (loss) per share	$ 0.28	$ (0.45)	$ 1.12	$ 0.58
Diluted earnings (loss) per share	$ 0.28	$ (0.45)	$ 1.10	$ 0.56

XML

Stockholders' Equity - Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restricted Stock and Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted earnings per share	10,444	407,902	3,511	34,620
Stock Appreciation Rights [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of diluted earnings per share	3,340	115,790	2,625	97,540

XML

New Accounting Standards

9 Months Ended

Sep. 30, 2014

Accounting Changes and Error Corrections [Abstract]

New Accounting Standards

3. NEW ACCOUNTING STANDARDS

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update 2014-09, “Revenue from Contracts with Customers”. The new standard provides a single, comprehensive model for revenue arising from contracts with customers and supersedes most current revenue recognition guidance. The new standard requires an entity to recognize revenue at an amount that reflects the consideration to which the company expects to be entitled in exchange for transferring goods or services to a customer. The new guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016 and allows for either full retrospective or modified retrospective application. No early adoption is permitted. The Company is currently assessing the impact of the adoption of this new standard on its consolidated financial statements and footnote disclosures.

XML

Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	9 Months Ended						3 Months Ended
	May 07, 2014	Sep. 30, 2014	May 07, 2014	Apr. 30, 2014	Feb. 28, 2014	Dec. 31, 2013	Apr. 30, 2014 Scenario, Previously Reported [Member]	Jun. 30, 2014 February 2014 Stock Repurchase Program [Member]	Feb. 28, 2014 February 2014 Stock Repurchase Program [Member]	Oct. 23, 2014 October 2014 Stock Repurchase Program [Member] Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Stock split description		Each stockholder to receive one additional share of common stock, par value $0.01, for each share they held as of the record date. All common stock share and per share data for all periods presented in the accompanying unaudited condensed consolidated financial statements and notes thereto are presented on a post-split basis.
Common stock, par value		$ 0.01	$ 0.01		$ 0.01	$ 0.01
Stock split conversion ratio	2
Number of authorized shares of common stock		80,000,000		80,000,000		80,000,000	40,000,000
Common stock repurchase authorized amount									$ 50
Number of shares repurchased by the Company								1,657,919
Value of shares repurchased by the Company								$ 50.0
Shares repurchased by the Company, Average price per share								$ 30.16
Common stock repurchase program, authorized shares										2,000,000

XML

Commitments and Contingencies - Summary of Reconciliation of Company's Warranty Reserve (Detail) (Surface Flaking Warranty Reserve [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Surface Flaking Warranty Reserve [Member]
Warranties [Line Items]
Beginning balance	$ 40,312	$ 28,487
Changes in estimates related to pre-existing warranties		20,000
Settlements made during the period	(6,647)	(5,947)
Ending balance	$ 33,665	$ 42,540

XML

Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 3,841	$ 3,772
Accounts receivable, net	44,977	37,338
Inventories	14,639	22,428
Prepaid expenses and other assets	3,279	3,145
Deferred income taxes	9,497	9,497
Total current assets	76,233	76,180
Property, plant and equipment, net	98,199	100,783
Goodwill and other intangibles	10,536	10,542
Other assets	897	652
Total assets	185,865	188,157
Current liabilities:
Accounts payable	12,864	14,891
Accrued expenses	24,275	23,295
Accrued warranty	8,500	9,000
Line of credit	3,000
Total current liabilities	48,639	47,186
Deferred income taxes	360	360
Non-current accrued warranty	27,587	31,812
Other long-term liabilities	2,164	2,183
Total liabilities	78,750	81,541
Stockholders' equity:
Preferred stock, $0.01 par value, 3,000,000 shares authorized; none issued and outstanding
Common stock, $0.01 par value, 80,000,000 shares authorized; 34,783,546 and 34,598,124 shares issued and 32,003,117 and 33,475,614 shares outstanding at September 30, 2014 and December 31, 2013, respectively	348	173
Additional paid-in capital	115,623	101,667
Retained earnings	66,144	29,776
Treasury stock, at cost, 2,780,429 and 1,122,510 shares at September 30, 2014 and December 31, 2013, respectively	(75,000)	(25,000)
Total stockholders' equity	107,115	106,616
Total liabilities and stockholders' equity	$ 185,865	$ 188,157

XML

Business and Organization

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Business and Organization

1. BUSINESS AND ORGANIZATION

Trex Company, Inc. (the “Company”) is the world’s largest manufacturer of wood-alternative decking and railing products, which are marketed under the brand name Trex^®. The Company is incorporated in Delaware. The principal executive offices are located at 160 Exeter Drive, Winchester, Virginia 22603, and the telephone number at that address is (540) 542-6300. The Company operates in one business segment.

XML

Stock-Based Compensation - Summary of Stock-Based Compensation Grants (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014
Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Awards Granted	3,623
Weighted-Average Grant Price Per Share	$ 38.17
Time-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Awards Granted	66,409
Weighted-Average Grant Price Per Share	$ 32.69
Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Awards Granted	42,676
Weighted-Average Grant Price Per Share	$ 33.72

XML

Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Assumptions Used to Estimate Fair Value of Each SAR

For SARs issued in the nine months ended September 30, 2014 and 2013, respectively, the assumptions shown in the following table were used:

	Nine Months Ended September 30,
	2014			2013
Weighted-average fair value of grants	$	18.02		$	11.68
Dividend yield		0	%		0	%
Average risk-free interest rate		1.7	%		0.7	%
Expected term (years)		5			5
Expected volatility		53	%		64	%

Summary of Stock-Based Compensation Grants

The following table summarizes the Company’s stock-based compensation grants for the nine months ended September 30, 2014:

	Stock Awards Granted		Weighted-Average Grant Price Per Share
Stock appreciation rights		3,623	$	38.17
Time-based restricted stock		66,409	$	32.69
Performance-based restricted stock		42,676	$	33.72

Summary of Stock-Based Compensation Expense

The following table summarizes the Company’s stock-based compensation expense for the three and nine months ended September 30, 2014 and 2013 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Stock appreciation rights	$	222	$	307	$	813	$	945
Time-based restricted stock		769		667		2,247		1,790
Performance-based restricted stock		205		—		570		—
Employee stock purchase plan		21		10		42		46
Total stock-based compensation	$	1,217	$	984	$	3,672	$	2,781

XML

Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1,217	$ 984	$ 3,672	$ 2,781
Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	222	307	813	945
Time-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	769	667	2,247	1,790
Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	205		570
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 21	$ 10	$ 42	$ 46

XML

Business and Organization - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014 Segment
Accounting Policies [Abstract]
Number of operating segments of business	1

XML

Basis of Presentation

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Basis of Presentation

2. BASIS OF PRESENTATION

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the accompanying condensed consolidated financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. In the opinion of management, all adjustments (consisting of normal and recurring adjustments except as otherwise described herein) considered necessary for a fair presentation have been included in the accompanying condensed consolidated financial statements. Certain prior year amounts in the accompanying condensed consolidated financial statements have been reclassified to conform to the current year presentation. All common stock share and per share data for all historical periods presented have been retroactively adjusted to reflect a two-for-one stock split distributed on May 7, 2014 (see Note 8). The consolidated results of operations for the nine months ended September 30, 2014 are not necessarily indicative of the results that may be expected for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements as of December 31, 2013 and 2012 and for each of the three years in the period ended December 31, 2013 included in the annual report of Trex Company, Inc. on Form 10-K, as filed with the Securities and Exchange Commission.

The Company’s critical accounting policies are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

XML

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	34,783,546	34,598,124
Common stock, shares outstanding	32,003,117	33,475,614
Treasury stock, shares	2,780,429	1,122,510

XML

Commitments and Contingencies

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

12. COMMITMENTS AND CONTINGENCIES

Contract Termination Costs

In anticipation of relocating its corporate headquarters, the Company entered into a lease agreement in 2005. The Company reconsidered and decided not to move its headquarters. The lease obligates the Company to lease 55,047 square feet of office space through June 30, 2019. As of September 30, 2014, the Company has executed subleases for 41,701 square feet of the leased space, 16,969 of which expires on December 31, 2014, and is currently marketing the remaining portion of the space to find a suitable tenant. The Company estimates that the present value of the estimated future sublease receipts, net of transaction costs, will be less than the Company’s remaining minimum lease payment obligations under its lease and has recorded a liability for the expected shortfall. During the nine months ended September 30, 2014, due to revisions to its estimate of future sublease receipts, the Company recorded a charge of $1.0 million to selling, general and administrative expenses.

To estimate future sublease receipts, the Company has assumed that existing subleases will be renewed or new subleases will be executed at rates consistent with rental rates in the current subleases or estimated market rates and that existing vacancies will be filled within one year. However, management cannot be certain that the timing of future subleases or the rental rates contained in future subleases will not differ from current estimates. Factors such as the availability of commercial office space, poor market conditions and subtenant preferences will influence the terms achieved in future subleases. The inability to sublet the office space in the future or unfavorable changes to key management assumptions used in the estimate of the future sublease receipts may result in material charges to selling, general and administrative expenses in future periods.

As of September 30, 2014, the minimum payments remaining under the Company’s lease relating to its reconsidered corporate relocation over the years ending December 31, 2014, 2015, 2016, 2017 and 2018 are $0.4 million, $1.7 million, $1.8 million, $1.8 million and $1.8 million, respectively, and $0.9 million in 2019. The minimum receipts remaining under the Company’s existing subleases over the years ending December 31, 2014, 2015, 2016, 2017 and 2018 are $0.3 million, $0.8 million, $0.7 million, $0.7 million and $0.7 million, respectively, and $0.4 million in 2019.

The following table provides information about the Company’s liability related to the lease (in thousands):

	2014			2013
Beginning balance, January 1	$	1,787		$	1,103
Net rental receipts (payments)		(281	)		(410	)
Accretion of discount		125			61
Increase in net estimated contract termination costs		1,018			1,144
Ending balance, September 30	$	2,649		$	1,898

Product Warranty

The Company warrants that its products will be free from material defects in workmanship and materials. This warranty generally extends for a period of 25 years for residential use and 10 years for commercial use. (With respect to TrexTrim™ and Trex Reveal^® Railing, the warranty period is 25 years for both residential and commercial use.) With respect to the Company’s Transcend^®, Enhance^®, Select^® and Universal Fascia product, the Company further warrants that the product will not fade in color more than a certain amount and will be resistant to permanent staining from food substances or mold (provided the stain is cleaned within seven days of appearance). This warranty extends for a period of 25 years for residential use and 10 years for commercial use. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price.

Historically, the Company has not had material numbers of claims submitted or settled under the provisions of its product warranties, with the exception of claims related to material produced at its Nevada facility prior to 2007 that exhibits surface flaking. The Company continues to receive and settle surface flaking claims and maintains a warranty reserve to provide for the settlement of these claims. Estimating the warranty reserve for surface flaking claims requires management to estimate (1) the number of claims to be settled with payment and (2) the average cost to settle each claim, both of which are subject to variables that are difficult to estimate.

To estimate the number of claims to be settled with payment, the Company utilizes actuarial techniques to quantify both the expected number of claims to be received and the percentage of those claims that will ultimately require payment. Estimates for both of these elements (number and percentage of claims that will ultimately require payment) are quantified using a range of assumptions derived from the recent claim count history and the identification of factors influencing the claim counts, including the downward trend in received claims due to the passage of time since production of the suspect material. For each of the various parameters used in the analysis, the assumed values in the actuarial valuation produce results that represent the Company’s best estimate for the ultimate number of claims to be settled with payment. The cost per claim varies due to a number of factors, including the size of affected decks, the type of replacement material used, the cost of production of replacement material and the method of claim settlement.

The Company monitors surface flaking claims activity each quarter for indications that its estimates require revision. Due to extensive use of decks during the summer outdoor season, variances to annual claims expectations are typically more meaningful during the latter part of the fiscal year. Through the third quarter of 2014, the number of claims received was lower than the Company’s expectations, while the average cost per claim was higher than the Company’s expectations for 2014. Based on claims activity experienced during the current year, the Company revised its assumed future number of claims and average cost per claim. The revised assumptions did not result in a change to the Company’s warranty reserve, which as of September 30, 2014, the Company believes is sufficient to cover future surface flaking obligations.

The Company’s analysis is based on currently known facts and a number of assumptions. Projecting future events such as the number of claims to be received, the number of claims that will require payment and the average cost of claims could cause the actual warranty liabilities to be higher or lower than those projected which could materially affect the Company’s financial condition, results of operations or cash flow. The Company estimates that the number of claims received will continue to decline over time and that the average cost per claim will remain relatively stable. If the level of claims received or average cost per claim differs materially from expectations, it could result in additional increases to the warranty reserve and reduced earnings and cash flows in future periods. The Company estimates that a 10% change in the expected number of remaining claims to be settled with payment or the expected cost to settle claims may result in approximately a $3.4 million change in the surface flaking warranty reserve.

The following is a reconciliation of the Company’s surface flaking warranty reserve (in thousands):

	2014			2013
Beginning balance, January 1	$	40,312		$	28,487
Changes in estimates related to pre-existing warranties		—			20,000
Settlements made during the period		(6,647	)		(5,947	)
Ending balance, September 30	$	33,665		$	42,540

The remainder of the Company’s warranty reserve represents amounts accrued for non-surface flaking claims.

Legal Matters

On December 16, 2013, the United States District Court, Northern District of California Court granted final approval of the settlement with the law firm of Hagens Berman Sobol Shapiro LLP, relating to the previously reported class action lawsuit brought on behalf of Dean Mahan, and other named and similarly situated plaintiffs generally which alleged certain defects in the Company’s products relating to mold growth, color fading and color variation. As of the date of this report, the Company has distributed substantially all cash payments and rebate certificates under the settlement. Claimants who were denied relief could appeal Trex’s decision, and the deadline for appeals has now passed. The Company believes that payments to consumers for all relief under the settlement, even after determination of all appeals, will not exceed approximately $1.0 million. In addition to such amount, the Company previously paid $1.8 million related to this litigation, representing payment of attorneys’ fees to class counsel and named plaintiff awards in the nationwide settlement and the settlement of corollary cases brought in Indiana, Kentucky, New Jersey and Michigan, all as previously disclosed.

The Company has other lawsuits, as well as other claims, pending against it which are ordinary routine litigation and claims incidental to the business. Management has evaluated the merits of these other lawsuits and claims, and believes that their ultimate resolution will not have a material effect on the Company’s consolidated financial condition, results of operations, liquidity or competitive position.

XML

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 17, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Trading Symbol	TREX
Entity Registrant Name	TREX CO INC
Entity Central Index Key	0001069878
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		32,006,335

XML

Financial Instruments (Policies)

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Financial Instruments

The Company considers the recorded value of its financial assets and liabilities, consisting primarily of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities to approximate the fair value of the respective assets and liabilities at September 30, 2014 and December 31, 2013.

Share-based Compensation

The Company has one stock-based compensation plan, the 2014 Stock Incentive Plan (the “Plan”), approved by the Company’s stockholders in April 2014. The Plan amended and restated in its entirety the Trex Company, Inc. 2005 Stock Incentive Plan. The Plan is administered by the Compensation Committee of the Company’s Board of Directors. Stock-based compensation is granted to officers, directors and certain key employees in accordance with the provisions of the Plan. The Plan provides for grants of stock options, restricted stock, restricted stock units, stock appreciation rights (“SARs”), and unrestricted stock. As of September 30, 2014, the total aggregate number of shares of the Company’s common stock that may be issued under the Plan is 6,420,000.

The Company recognizes stock-based compensation expense ratably over the period from the grant date to the earlier of: (1) the vesting date of the award, or (2) the date the grantee is eligible to retire without forfeiting the award. For performance-based restricted stock, expense is recognized ratably over the performance and vesting period of each tranche based on management’s judgment of the ultimate award that is likely to be paid out based on the achievement of the predetermined performance measures.

Contract Termination Costs

Contract Termination Costs

In anticipation of relocating its corporate headquarters, the Company entered into a lease agreement in 2005. The Company reconsidered and decided not to move its headquarters. The lease obligates the Company to lease 55,047 square feet of office space through June 30, 2019. As of September 30, 2014, the Company has executed subleases for 41,701 square feet of the leased space, 16,969 of which expires on December 31, 2014, and is currently marketing the remaining portion of the space to find a suitable tenant. The Company estimates that the present value of the estimated future sublease receipts, net of transaction costs, will be less than the Company’s remaining minimum lease payment obligations under its lease and has recorded a liability for the expected shortfall. During the nine months ended September 30, 2014, due to revisions to its estimate of future sublease receipts, the Company recorded a charge of $1.0 million to selling, general and administrative expenses.

To estimate future sublease receipts, the Company has assumed that existing subleases will be renewed or new subleases will be executed at rates consistent with rental rates in the current subleases or estimated market rates and that existing vacancies will be filled within one year. However, management cannot be certain that the timing of future subleases or the rental rates contained in future subleases will not differ from current estimates. Factors such as the availability of commercial office space, poor market conditions and subtenant preferences will influence the terms achieved in future subleases. The inability to sublet the office space in the future or unfavorable changes to key management assumptions used in the estimate of the future sublease receipts may result in material charges to selling, general and administrative expenses in future periods.

Product Warranty

Product Warranty

The Company warrants that its products will be free from material defects in workmanship and materials. This warranty generally extends for a period of 25 years for residential use and 10 years for commercial use. (With respect to TrexTrim™ and Trex Reveal^® Railing, the warranty period is 25 years for both residential and commercial use.) With respect to the Company’s Transcend^®, Enhance^®, Select^® and Universal Fascia product, the Company further warrants that the product will not fade in color more than a certain amount and will be resistant to permanent staining from food substances or mold (provided the stain is cleaned within seven days of appearance). This warranty extends for a period of 25 years for residential use and 10 years for commercial use. If there is a breach of such warranties, the Company has an obligation either to replace the defective product or refund the purchase price.

Historically, the Company has not had material numbers of claims submitted or settled under the provisions of its product warranties, with the exception of claims related to material produced at its Nevada facility prior to 2007 that exhibits surface flaking. The Company continues to receive and settle surface flaking claims and maintains a warranty reserve to provide for the settlement of these claims. Estimating the warranty reserve for surface flaking claims requires management to estimate (1) the number of claims to be settled with payment and (2) the average cost to settle each claim, both of which are subject to variables that are difficult to estimate.

To estimate the number of claims to be settled with payment, the Company utilizes actuarial techniques to quantify both the expected number of claims to be received and the percentage of those claims that will ultimately require payment. Estimates for both of these elements (number and percentage of claims that will ultimately require payment) are quantified using a range of assumptions derived from the recent claim count history and the identification of factors influencing the claim counts, including the downward trend in received claims due to the passage of time since production of the suspect material. For each of the various parameters used in the analysis, the assumed values in the actuarial valuation produce results that represent the Company’s best estimate for the ultimate number of claims to be settled with payment. The cost per claim varies due to a number of factors, including the size of affected decks, the type of replacement material used, the cost of production of replacement material and the method of claim settlement.

XML

Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Net sales	$ 95,502	$ 72,249	$ 317,458	$ 278,680
Cost of sales	65,133	72,098	203,897	199,747
Gross profit	30,369	151	113,561	78,933
Selling, general and administrative expenses	15,902	15,375	54,468	58,609
Income (loss) from operations	14,467	(15,224)	59,093	20,324
Interest expense, net	167	70	791	531
Income (loss) before income taxes	14,300	(15,294)	58,302	19,793
Provision for income taxes	5,387	4	21,934	298
Net income (loss)	8,913	(15,298)	36,368	19,495
Basic earnings (loss) per common share	$ 0.28	$ (0.45)	$ 1.12	$ 0.58
Basic weighted average common shares outstanding	31,606,264	33,660,212	32,538,832	33,772,710
Diluted earnings (loss) per common share	$ 0.28	$ (0.45)	$ 1.10	$ 0.56
Diluted weighted average common shares outstanding	32,008,781	33,660,212	32,966,317	34,506,910
Comprehensive income (loss)	$ 8,913	$ (15,298)	$ 36,368	$ 19,495

XML

Financial Instruments

9 Months Ended

Sep. 30, 2014

Investments, All Other Investments [Abstract]

Financial Instruments

7. FINANCIAL INSTRUMENTS

The Company considers the recorded value of its financial assets and liabilities, consisting primarily of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities to approximate the fair value of the respective assets and liabilities at September 30, 2014 and December 31, 2013.

XML

Debt

9 Months Ended

Sep. 30, 2014

Debt Disclosure [Abstract]

Debt

6. DEBT

The Company’s outstanding debt consists of a revolving credit facility.

Revolving Credit Facility

The Company currently has an Amended Credit Agreement which provides the Company with one or more revolving loans in a collective maximum principal amount of $100 million. On December 17, 2013, the Company entered into a Second Amendment (“Second Amendment”) to the Amended Credit Agreement dated as of January 6, 2012, as amended by the First Amendment dated February 26, 2013 (the “Credit Agreement”). Pursuant to the Second Amendment, the Credit Agreement was amended to temporarily increase the maximum amount of the revolver loans from $100 million to $125 million during the period from January 1, 2014 through and including June 30, 2014 to meet seasonal cash requirements. No other material changes were made to the terms of the Credit Agreement. The maximum amount of the revolver loans reverted to $100 million on July 1, 2014. Pursuant to a Letter Agreement dated October 23, 2014, the termination date of the Credit Agreement was extended to January 9, 2016.

Amounts drawn under the Credit Agreement are subject to a borrowing base consisting of certain accounts receivables, inventories, machinery and equipment and real estate. At September 30, 2014, the Company had $3 million of outstanding borrowings under its revolving credit facility and remaining available borrowing capacity of approximately $63 million.

Compliance with Debt Covenants and Restrictions

The Company’s ability to make scheduled principal and interest payments and to borrow and repay amounts under any outstanding revolving credit facility, and continue to comply with any loan covenants depends primarily on the Company’s ability to generate sufficient cash flow from operations.

As of September 30, 2014, the Company was in compliance with all of the covenants contained in its debt agreements. Failure to comply with the loan covenants might cause lenders to accelerate the repayment obligations under the credit facility, which may be declared payable immediately based on a default.

XML

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Summary of Liability Related to Lease

The following table provides information about the Company’s liability related to the lease (in thousands):

	2014			2013
Beginning balance, January 1	$	1,787		$	1,103
Net rental receipts (payments)		(281	)		(410	)
Accretion of discount		125			61
Increase in net estimated contract termination costs		1,018			1,144
Ending balance, September 30	$	2,649		$	1,898

Summary of Reconciliation of Company's Warranty Reserve

The following is a reconciliation of the Company’s surface flaking warranty reserve (in thousands):

	2014			2013
Beginning balance, January 1	$	40,312		$	28,487
Changes in estimates related to pre-existing warranties		—			20,000
Settlements made during the period		(6,647	)		(5,947	)
Ending balance, September 30	$	33,665		$	42,540

XML

Inventories (Tables)

9 Months Ended

Sep. 30, 2014

Inventory Disclosure [Abstract]

Summary of Inventories, at LIFO Value

Inventories, at LIFO (last-in, first-out) value, consist of the following (in thousands):

	September 30, 2014			December 31, 2013
Finished goods	$	21,494		$	30,423
Raw materials		17,642			16,502
Total FIFO inventories		39,136			46,925
Reserve to adjust inventories to LIFO value		(24,497	)		(24,497	)
Total LIFO inventories	$	14,639		$	22,428

XML

Income Taxes

9 Months Ended

Sep. 30, 2014

Income Tax Disclosure [Abstract]

Income Taxes

10. INCOME TAXES

As of December 31, 2013, the Company determined that it more likely than not will realize most of its deferred tax assets and, as a result, reversed a significant portion of its valuation allowance. As of September 30, 2014, the Company has a valuation allowance of $4.2 million, primarily related to certain state tax credits the Company estimates will expire before they are realized. The Company analyzes its position in each reporting period, considering all available positive and negative evidence, in determining the expected realization of its deferred tax assets.

The Company’s effective tax rate for the nine months ended September 30, 2014 and 2013 was 37.6% and 1.5% respectively, which resulted in expense of $21.9 million and $0.3 million, respectively. The lower effective tax rate for the nine months ended September 30, 2013 was a direct result of the Company maintaining a full valuation allowance against its deferred tax assets.

During the nine months ended September 30, 2014, the Company realized $12.7 million of excess tax benefits from stock-based awards and, accordingly, recorded an increase to additional paid-in capital.

The Company operates in multiple tax jurisdictions and, in the normal course of business, its tax returns are subject to examination by various taxing authorities. Such examinations may result in future assessments by these taxing authorities, and the Company accrues a liability when it believes that it is more likely than not that benefits of tax positions will not be realized. The Company believes that adequate provisions have been made for all tax returns subject to examination. As of September 30, 2014, federal tax years 2011 through 2013 remain subject to examination.

In September 2013, the Internal Revenue Service issued Treasury Decision 9636, which enacted final tax regulations regarding the capitalization and expensing of amounts paid to acquire, produce, or improve tangible property. The regulations also include guidance regarding the retirement of depreciable property. The Company has assessed the impact of the final regulations on its financial statements and does not expect any material adjustments or changes.

XML

Stockholders' Equity

9 Months Ended

Sep. 30, 2014

Equity [Abstract]

Stockholders' Equity

8. STOCKHOLDERS’ EQUITY

Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except share and per share data):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2014		2013			2014		2013
Numerator:
Net income (loss) available to common shareholders	$	8,913	$	(15,298	)	$	36,368	$	19,495
Denominator:
Basic weighted average shares outstanding		31,606,264		33,660,212			32,538,832		33,772,710
Effect of dilutive securities:
SARs and options		237,602		—			268,016		566,190
Restricted stock		164,915		—			159,469		168,010
Diluted weighted average shares outstanding		32,008,781		33,660,212			32,966,317		34,506,910
Basic earnings (loss) per share	$	0.28	$	(0.45	)	$	1.12	$	0.58
Diluted earnings (loss) per share	$	0.28	$	(0.45	)	$	1.10	$	0.56

Diluted earnings per share is computed using the weighted average number of shares determined for the basic earnings per share computation plus the dilutive effect of common stock equivalents using the treasury stock method. The computation of diluted earnings per share excludes the following potentially dilutive securities because the effect would be anti-dilutive:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Restricted stock and stock options		10,444		407,902		3,511		34,620
Stock appreciation rights		3,340		115,790		2,625		97,540

Stock Split

In February 2014, the Company’s Board of Directors approved a two-for-one stock split of the Company’s common stock, par value $0.01. The stock split was in the form of a stock dividend distributed on May 7, 2014 to stockholders of record at the close of business on April 7, 2014. The stock split entitled each stockholder to receive one additional share of common stock, par value $0.01, for each share they held as of the record date. All common stock share and per share data for all periods presented in the accompanying unaudited condensed consolidated financial statements and notes thereto are presented on a post-split basis. Additionally, on April 30, 2014, the Company’s stockholders approved an amendment to the Company’s Restated Certificate of Incorporation to increase the number of authorized shares of common stock from 40 million to 80 million shares.

Stock Repurchase Programs

In February 2014, the Company’s Board of Directors authorized a common stock repurchase program of up to $50 million of the Company’s outstanding common stock (the “February 2014 Stock Repurchase Program”). This authorization has no expiration date. During the three months ended June 30, 2014, the Company repurchased 1,657,919 shares for $50.0 million at an average price of $30.16 per share, which completed the authorization under the February 2014 Stock Repurchase Program. The share and per share data for the repurchases are reflective of the two-for-one stock split distributed on May 7, 2014.

On October 23, 2014, the Company’s Board of Directors authorized a common stock repurchase program of up to two million shares of the Company’s outstanding common stock (the “October 2014 Stock Repurchase Program”). This authorization has no expiration date.

XML

Stock-Based Compensation

9 Months Ended

Sep. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

9. STOCK-BASED COMPENSATION

The Company has one stock-based compensation plan, the 2014 Stock Incentive Plan (the “Plan”), approved by the Company’s stockholders in April 2014. The Plan amended and restated in its entirety the Trex Company, Inc. 2005 Stock Incentive Plan. The Plan is administered by the Compensation Committee of the Company’s Board of Directors. Stock-based compensation is granted to officers, directors and certain key employees in accordance with the provisions of the Plan. The Plan provides for grants of stock options, restricted stock, restricted stock units, stock appreciation rights (“SARs”), and unrestricted stock. As of September 30, 2014, the total aggregate number of shares of the Company’s common stock that may be issued under the Plan is 6,420,000.

In 2014, the Company began granting performance-based restricted stock in addition to the time-based restricted stock it previously granted. The performance-based restricted shares have a three-year vesting period, vesting one-third each year based on target earnings before interest, taxes, depreciation and amortization, or “EBITDA”, for 1 year, cumulative 2 years and cumulative 3 years, respectively. With respect to each vesting, the number of shares that will vest will be between 0% and 200% of the target number of shares.

The fair value of each SAR is estimated on the date of grant using a Black-Scholes option-pricing formula. For SARs issued in the nine months ended September 30, 2014 and 2013, respectively, the assumptions shown in the following table were used:

	Nine Months Ended September 30,
	2014			2013
Weighted-average fair value of grants	$	18.02		$	11.68
Dividend yield		0	%		0	%
Average risk-free interest rate		1.7	%		0.7	%
Expected term (years)		5			5
Expected volatility		53	%		64	%

The following table summarizes the Company’s stock-based compensation grants for the nine months ended September 30, 2014:

	Stock Awards Granted		Weighted-Average Grant Price Per Share
Stock appreciation rights		3,623	$	38.17
Time-based restricted stock		66,409	$	32.69
Performance-based restricted stock		42,676	$	33.72

The Company recognizes stock-based compensation expense ratably over the period from the grant date to the earlier of: (1) the vesting date of the award, or (2) the date the grantee is eligible to retire without forfeiting the award. For performance-based restricted stock, expense is recognized ratably over the performance and vesting period of each tranche based on management’s judgment of the ultimate award that is likely to be paid out based on the achievement of the predetermined performance measures. The following table summarizes the Company’s stock-based compensation expense for the three and nine months ended September 30, 2014 and 2013 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Stock appreciation rights	$	222	$	307	$	813	$	945
Time-based restricted stock		769		667		2,247		1,790
Performance-based restricted stock		205		—		570		—
Employee stock purchase plan		21		10		42		46
Total stock-based compensation	$	1,217	$	984	$	3,672	$	2,781

Total unrecognized compensation cost related to unvested awards as of September 30, 2014 was $5.2 million. The cost of these unvested awards is being recognized over the requisite vesting period of each award.

XML

Seasonality

9 Months Ended

Sep. 30, 2014

Text Block [Abstract]

Seasonality

11. SEASONALITY

The Company’s operating results have historically varied from quarter to quarter, often attributable to seasonal trends in the demand for Trex^®. The Company has historically experienced lower net sales during the fourth quarter because holidays and adverse weather conditions in certain regions reduce the level of home improvement and construction activity.

XML

Stock-Based Compensation - Summary of Assumptions Used to Estimate Fair Value of Each SAR (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted-average fair value of grants	$ 18.02	$ 11.68
Dividend yield	0.00%	0.00%
Average risk-free interest rate	1.70%	0.70%
Expected term (years)	5 years	5 years
Expected volatility	53.00%	64.00%

XML

Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2014

Equity [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except share and per share data):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2014		2013			2014		2013
Numerator:
Net income (loss) available to common shareholders	$	8,913	$	(15,298	)	$	36,368	$	19,495
Denominator:
Basic weighted average shares outstanding		31,606,264		33,660,212			32,538,832		33,772,710
Effect of dilutive securities:
SARs and options		237,602		—			268,016		566,190
Restricted stock		164,915		—			159,469		168,010
Diluted weighted average shares outstanding		32,008,781		33,660,212			32,966,317		34,506,910
Basic earnings (loss) per share	$	0.28	$	(0.45	)	$	1.12	$	0.58
Diluted earnings (loss) per share	$	0.28	$	(0.45	)	$	1.10	$	0.56

Antidilutive Securities Excluded from Computation of Earnings Per Share

The computation of diluted earnings per share excludes the following potentially dilutive securities because the effect would be anti-dilutive:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Restricted stock and stock options		10,444		407,902		3,511		34,620
Stock appreciation rights		3,340		115,790		2,625		97,540

XML

Inventories - Summary of Inventories, at LIFO Value (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Finished goods	$ 21,494	$ 30,423
Raw materials	17,642	16,502
Total FIFO inventories	39,136	46,925
Reserve to adjust inventories to LIFO value	(24,497)	(24,497)
Total LIFO inventories	$ 14,639	$ 22,428

XML

Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating Activities
Net income	$ 36,368	$ 19,495
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,449	12,444
Deferred income taxes		(2,991)
Stock-based compensation	3,672	2,781
Loss on disposal of property, plant and equipment	169	587
Excess tax benefits from stock compensation	(12,677)	(2,567)
Other non-cash adjustments	(245)	(337)
Changes in operating assets and liabilities:
Accounts receivable	(7,698)	2,543
Inventories	7,789	6,343
Prepaid expenses and other assets	(415)	447
Accounts payable	(2,027)	(4,488)
Accrued expenses and other liabilities	(3,690)	16,775
Income taxes receivable/payable	12,630	2,633
Net cash provided by operating activities	45,325	53,665
Investing Activities
Expenditures for property, plant and equipment	(8,794)	(8,971)
Proceeds from sales of property, plant and equipment	48	176
Purchase of acquired company, net of cash acquired	(44)
Notes receivable, net	59	78
Net cash used in investing activities	(8,731)	(8,717)
Financing Activities
Financing costs		(73)
Borrowings under line of credit	139,000	74,500
Principal payments under line of credit	(136,000)	(79,500)
Repurchases of common stock	(52,892)	(28,445)
Proceeds from employee stock purchase and option plans	690	3,427
Excess tax benefits from stock compensation	12,677	2,567
Net cash used in financing activities	(36,525)	(27,524)
Net increase in cash and cash equivalents	69	17,424
Cash and cash equivalents at beginning of period	3,772	2,159
Cash and cash equivalents at end of period	3,841	19,583
Supplemental Disclosure:
Cash paid for interest, net of capitalized interest	498	348
Cash paid for income taxes, net	$ 9,342	$ 696

XML

Accrued Expenses

9 Months Ended

Sep. 30, 2014

Payables and Accruals [Abstract]

Accrued Expenses

5. ACCRUED EXPENSES

Accrued expenses consist of the following (in thousands):

	September 30, 2014		December 31, 2013
Accrued sales and marketing	$	10,626	$	5,269
Accrued compensation and benefits		7,027		9,135
Accrued rent obligations		2,649		1,787
Accrued manufacturing expenses		1,080		1,107
Accrued legal contingency		158		3,174
Other		2,735		2,823
Total accrued expenses	$	24,275	$	23,295

XML

Inventories - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Inventory Disclosure [Abstract]
LIFO inventory liquidations	$ 0.0	$ 0.0

XML

Commitments and Contingencies - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Schedule Of Commitments And Contingencies [Line Items]
Charge recorded due to revised estimate of sublease receipts	$ 1,018,000	$ 1,144,000
Payments related to mold growth litigation	1,800,000
Expected total payments under settlement	1,000,000
Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	25 years
Commercial Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	10 years
Surface Flaking Warranty Reserve [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage change in warranty claims used as a threshold for disclosure	10.00%
Change in warranty reserve for disclosure purposes only	3,400,000
Transcend, Enhance, Select and Universal Fascia Product [Member] | Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	25 years
Transcend, Enhance, Select and Universal Fascia Product [Member] | Commercial Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	10 years
TrexTrim and Trex Reveal Railing [Member] | Commercial and Residential Use [Member]
Schedule Of Commitments And Contingencies [Line Items]
Warranty period	25 years
Sublease [Member]
Schedule Of Commitments And Contingencies [Line Items]
Lease square feet	41,701
Contract Termination [Member]
Schedule Of Commitments And Contingencies [Line Items]
Lease square feet	55,047
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for remainder of 2014	400,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2015	1,700,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2016	1,800,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2017	1,800,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2018	1,800,000
Minimum payments remaining under the Company's lease relating to its reconsidered corporate relocation for 2019	900,000
Minimum receipts remaining under the Company's existing subleases for remainder of 2014	300,000
Minimum receipts remaining under the Company's existing subleases for 2015	800,000
Minimum receipts remaining under the Company's existing subleases for 2016	700,000
Minimum receipts remaining under the Company's existing subleases for 2017	700,000
Minimum receipts remaining under the Company's existing subleases for 2018	700,000
Minimum receipts remaining under the Company's existing subleases for 2019	$ 400,000
Subleases Expiring December 31, 2014 [Member]
Schedule Of Commitments And Contingencies [Line Items]
Lease square feet	16,969

XML

Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2014

Payables and Accruals [Abstract]

Summary of Accrued Expenses

Accrued expenses consist of the following (in thousands):

	September 30, 2014		December 31, 2013
Accrued sales and marketing	$	10,626	$	5,269
Accrued compensation and benefits		7,027		9,135
Accrued rent obligations		2,649		1,787
Accrued manufacturing expenses		1,080		1,107
Accrued legal contingency		158		3,174
Other		2,735		2,823
Total accrued expenses	$	24,275	$	23,295