Azek IPO Presentation Deck

Improving Profitability ($inion) $225 35.5% 2017 ADJUSTED GROSS PROFIT AND MARGIN $254 37.3% 2018 $315 39.6% $339 $138 38.5% $162 39.3% 2019 LTM 3/31 H1 2019 H1 2020 Recent investments in recycling and productivity initiatives starting to deliver results Acquisition of Return Polymers delivered immediate procurement cost savings (~$2 million annualized) ($n $131 Source: Company financials Note: FY onded September. Refer to Appende for reconciliations for Adjusted Gross Profe and Adjusted EBITDA 20.7% 2017 ADJUSTED EBITDA AND MARGIN $150 27.0% 2018 $180 22.6% $195 THE AZEK COMPANY 23.0% $74 20.8% ✓ >$40 million increase in SG&A expense since 2017 Highly variable cost structure $90 21.8% 2019 LTM 3/31 H1 2019 H1 2020 33

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