Azek Investor Presentation Deck

SIGNIFICANT WOOD CONVERSION OPPORTUNITY, EARLY IN THE JOURNEY COMBINED, WOOD STILL REPRESENTS ~64% OF OUR CORE MARKETS TODAY +77% Conversion Opportunity in Decking Pressure Treated Wood Decking o Prone to moisture damage, fading, rot o Requires maintenance and staining o Inconsistent visuals over time THE AZEK COMPANY TimberTech AZEK o Long-term beauty o 50-Year fade and stain warranty o More environmentally sustainable than pressure treated decking 17.8% +59% Conversion Opportunity in Exterior Trim Composite Decking Gaining Share ~50% (% of total market linear feet) 2017 +67% Conversion Opportunity in Railing 18.6% 2018 20.1% 2019 21.6% 2020 I J I We believe the wood alternative decking market could reach ~50% share over time (vs. today's ~22%) Long-Term Material Conversion Opportunity in Decking See APPENDIX page 21 for details and sources. 8

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