Exhibit 10.1

Trex Company, Inc.

Description of Non-Employee Director Compensation

Non-employee directors of Trex Company (the “Company”) receive cash and
stock-based compensation under the Trex Company, Inc. Amended and Restated 1999
Incentive Plan for Outside Directors, which is referred to herein as the
“Outside Director Plan.” The Outside Director Plan is administered by the
nominating/corporate governance committee. All stock-based grants awarded as
compensation to non-employee directors are issued under the Trex Company, Inc.
2005 Stock Incentive Plan, which (together with the Company’s predecessor stock
incentive plan amended and restated by the current plan) is referred to herein
as the “Stock Incentive Plan.” Unless and until the board of directors
determines otherwise, stock-based grants under the Outside Director Plan will be
made in the form of stock-settled stock appreciation rights, or “SARs,” valued
using the Black-Scholes valuation model.

Upon initial appointment to the board of directors, non-employee directors will
receive an award of SARs valued at $28,800. For service on the board of
directors, each non-employee director receives an annual retainer of $24,000, a
$1,000 meeting fee for each in-person meeting attended, a $500 fee for each
telephonic meeting attended, and an annual award of SARs valued at $28,800.
Furthermore, each non-employee director who serves as chairman of the board
receives an annual retainer of $54,000 in lieu of the $24,000 payment referred
to above, and the amount of $25,361 in cash in lieu of the SARs referred to
above. Each member of the audit committee (other than the chairman) receives an
annual committee retainer of $6,500, each member of the compensation committee
(other than the chairman) receives an annual committee retainer of $4,000, and
each member of the nominating/corporate governance committee (other than the
chairman) receives an annual committee retainer of $3,500. The chairman of the
audit committee receives an annual committee fee of $12,500, and the chairmen of
the compensation and the nominating/corporate governance committees receive an
annual committee fee of $7,500. For all committees, each committee member,
including the chairman of each committee, receives a $1,000 meeting fee for a
special meeting not held in conjunction with a scheduled board of directors
meeting, and a $500 fee for each telephonic meeting not held in conjunction with
a telephonic board of directors meeting.

The $24,000 annual director retainer and the annual committee retainers are paid
in the form of cash or grants of SARs, or a combination of these forms of
consideration based on the percentages of the forms of consideration elected by
the serving director, in four equal quarterly installments in arrears on the
first business day following each quarter of the fiscal year in which the
eligible director completes board or committee service. The annual grants of
SARs are made on the date of the first regularly scheduled board of directors
meeting after June 30 of each year. All grants of SARs vest immediately upon
grant and have a term of ten years. All fees described above paid in arrears
were prorated for any partial periods served.

The Company does not provide pensions, medical benefits or other benefit
programs to non-employee directors.