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408.3.1.2 Solar Reflectance Index
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Roof products shall be permitted to use a solar reflectance index (SRI) where the calculated value is in compliance with Table 408.3.1 values for minimum aged SRI. The SRI value shall be determined using ASTM E 1980 with a convection coefficient of 2.1 Btu/h-ft2 (12 W/m2 × k) based on three-year aged roof samples tested in accordance with the test methods in Section 408.3.1.1.