Azek Investor Presentation Deck

ATTRACTIVE AND IMPROVING PROFITABILITY ADJUSTED GROSS PROFIT AND MARGIN $ in millions $225 35.5% 2017 $254 37.3% 2018 $315 $359 2019 39.6% 39.9% 39.5% 2020 $434 LTM 6/30/21 $253 39.8% THE AZEK. COMPANY YTD Q3 2020 $328 39.3% YTD Q3 2021 o Recent investments in recycling and manufacturing productivity initiatives delivering results o Multiple levers to drive margin expansion including recycling initiatives and continuous improvement ADJUSTED EBITDA AND MARGIN $ in millions $131 20.7% 2017 $150 22.0% 2018 $180 22.6% 2019 $214 23.7% 2020 $259 23.6% LTM 6/30/21 $147 23.2% YTD Q3 2020 High confidence in long-term margin opportunity given high variable cost structure and modular capacity deployment $193 23.1% YTD Q3 2021 > $50 million increase in SG&A expense investments since 2017 o Highly variable cost structure Source: Company financials. Note: FY ended September. Refer to Appendix pages 34 to 36 for reconciliations for Adjusted Gross Profit and Adjusted EBITDA. 31

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