Exhibit 23

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

     We consent to the incorporation by reference in the Registration Statements
on Form S-8 (Nos. 333-76847 and 333-83998) pertaining to the Trex Company,
Inc. 1999 Employee Stock Purchase Plan and the Trex Company, Inc. 1999 Stock
Option and Incentive Plan of our report dated February 8, 2002, with respect to
the consolidated financial statements of Trex Company, Inc. included in its
Annual Report (Form 10-K) for the year ended December 31, 2001, filed with the
Securities and Exchange Commission.

                                                           /s/ Ernst & Young LLP

March 19, 2002
McLean, Virginia