Trex Company Investor Presentation — November 2022

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November 2022INVESTOR PRESENTATION

This presentation 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. These

statements are subject to risks and uncertainties that could cause the Company’s actual operating results to differ materially from those contemplated by the forward -looking

statements. For further information on risk factors affecting the Company’s business, please refer to our most recent annual and quarterly reports filed with the U.S. Securities and Exchange Commission. The Company expressly disclaims any obligation to update or revise publicly any forward -looking statements, whether as a result of new information, future

events or otherwise.

This presentation refers to certain financial measures not prepared in accordance with U.S.

generally accepted accounting principles (GAAP), including adjusted net sales, adjusted gross margin, adjusted earnings before interest, taxes, depreciation and amortization (EBITDA), adjusted operating income, adjusted diluted earnings per share (EPS), free cash flow, and net debt. We believe that the use of non- GAAP measures helps investors to gain a

better understanding of our core operating results and future prospects, consistent with how management measures and forecasts the Company’s performance, especially when comparing such results to previous periods or forecasts. The non- GAAP measures included

in this presentation are not meant to be considered superior to or a substitute for our GAAP results. Reconciliations of the non -GAAP measures to the most directly comparable GAAP

measures are available in the appendix to this presentation.SAFE HARBOR / NON -GAAP MEASURES33

MORE THAN 30 YEARS OF LEADERSHIP IN OUTDOOR LIVING

Engineering what’s next in Outdoor Living®

Full suite of Outdoor Living products

Strongest industry recognition and awards from

home builders, consumers and contractors

Sustainable product innovation is in our DNA

Driving conversion from wood

New products for incremental consumers and fueling the DIY spirit

Trex.com and Decks.com command nearly 57% of category web trafficLeading distributor and dealer network

Strongest distribution channel in the industry

Over 6,700 stocking locations

Strong environmental credentials

Decking comprised primarily of a blend of 95% reclaimed wood fibers and recycled polyethylene film

One of largest polyethylene film recyclers in North America, upcycling waste material into higher -value products44

LEADERSHIP & RECOGNI TION