Azek Investor Presentation Deck

EXECUTION DRIVING GROWTH & IMPROVING PROFITABILITY $ in millions $633 2017 12.4% CAGR $682 7.8% 2018 Net Sales $794 16.5% 2019 $899 13.2% 2020 Adjusted EBITDA $1,097mm / 28.9% LTM 6/30/21 Net Sales / YoY % Growth $131 THE AZEK. COMPANY 20.7% 2017 +300 bps margin improvement $150 22.0% 2018 $180 22.6% 2019 $214 23.7% 2020 YOY Sales Growth / Adjusted EBITDA Margin $259mm/23.6% LTM 6/30/21 Adj. EBITDA / % Margin o Multi-year strategic growth & margin expansion plan underway o Investments in sales, marketing, Lean Six Sigma and recycling LEADER IN BRANDED OUTDOOR LIVING & EXTERIORS PRODUCTS TimberTech® Go Against the Grain. AZEK Exteriors o 30 year history with legacy of product innovation o 20+ years leader in high-performance decking and trim¹ o ~1,700 employees, including ~200 person salesforce o Our extensive network consists of 4,200+ pro dealers, 150+ distributor branch locations and tens of thousands of contractors o Network built over 20+ years o 99% of sales in North America o Domestic manufacturing Source: Company information and management estimates. Note: FY ended September 30. Refer to Appendix for reconciliation for Adjusted EBITDA and Adjusted EBITDA margin. 1 Market leadership is in capped composite and capped polymer decking and PVC trim. 6

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