Basis of Presentation	3 Months Ended
Jan. 29, 2012
Basis of Presentation [Abstract]
BASIS OF PRESENTATION	NOTE 1 — BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements for NCI Building Systems, Inc. (together with its subsidiaries, unless otherwise indicated, the “Company,” “we,” “us,” or “our”) have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, the unaudited consolidated financial statements included herein contain all adjustments necessary to fairly present our financial position, results of operations and cash flows for the periods indicated. Such adjustments, other than nonrecurring adjustments that have been separately disclosed, are of a normal, recurring nature. Operating results for the fiscal three month period ended January 29, 2012 are not necessarily indicative of the results that may be expected for the fiscal year ending October 28, 2012. Our sales and earnings are subject to both seasonal and cyclical trends and are influenced by general economic conditions, interest rates, the price of steel relative to other building materials, the level of nonresidential construction activity, roof repair and retrofit demand and the availability and cost of financing for construction projects. We use a four-four-five week calendar each quarter with our year end being on the Sunday closest to October 31. The year end for fiscal 2012 is October 28, 2012. Certain reclassifications have been made to prior period amounts to conform to the current presentation. The net effect of these reclassifications was not material to our consolidated financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K for the fiscal year ended October 30, 2011 filed with the Securities and Exchange Commission (the “SEC”) on December 21, 2011.

Basis of Presentation

3 Months Ended

Jan. 29, 2012

NOTE 1 — BASIS OF PRESENTATION

The accompanying unaudited consolidated financial statements for NCI Building Systems, Inc. (together with its subsidiaries, unless otherwise indicated, the “Company,” “we,” “us,” or “our”) have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, the unaudited consolidated financial statements included herein contain all adjustments necessary to fairly present our financial position, results of operations and cash flows for the periods indicated. Such adjustments, other than nonrecurring adjustments that have been separately disclosed, are of a normal, recurring nature. Operating results for the fiscal three month period ended January 29, 2012 are not necessarily indicative of the results that may be expected for the fiscal year ending October 28, 2012. Our sales and earnings are subject to both seasonal and cyclical trends and are influenced by general economic conditions, interest rates, the price of steel relative to other building materials, the level of nonresidential construction activity, roof repair and retrofit demand and the availability and cost of financing for construction projects.

We use a four-four-five week calendar each quarter with our year end being on the Sunday closest to October 31. The year end for fiscal 2012 is October 28, 2012.

Certain reclassifications have been made to prior period amounts to conform to the current presentation. The net effect of these reclassifications was not material to our consolidated financial statements.

For further information, refer to the consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K for the fiscal year ended October 30, 2011 filed with the Securities and Exchange Commission (the “SEC”) on December 21, 2011.