POWER OF ATTORNEY

     Know all by these present, that the undesigned, F. Timothy Reese, hereby
constitutes and appoints each of William R. Gupp, Lynn E. MacDonald and Richard
J. Parrino, the undersigned's true and lawful attorney-in-fact to:

     (1)  execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer, director or stockholder of Trex Company, Inc. (the
"Company"), a Schedule 13D and any amendments thereto, Forms 3, 4 and 5 and any
other documents to be filed with the Securities and Exchange Commission, in
accordance with Sections 13(d) and 16(a) of the Securities Exchange Act of 1934
and the rules thereunder;

     (2) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such Schedule
13D and any amendments thereto, any such Forms 3, 4 or 5 or such other documents
and file such form with the United States Securities and Exchange Commission and
any stock exchange or similar authority; and

     (3) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
and in the best interest of, or legally required by, the undersigned.

     The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, in serving in
such capacity at the request of the undersigned, is not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Sections 13 and 16 of the Securities Exchange Act of 1934.

     This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file a Schedule 13D and any amendments
thereto, Forms 3, 4, and 5 or such other doucments with respect to the
undersigned's holdings of and transctions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorney-in-fact.

     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 27th day of February 2008.

                                           /s/ F. Timothy Reese
                                          ______________________
                                          Signature

                                          F. Timothy Reese
                                          _______________________
                                          Name