// CODE SNIPPET
*1504.9 Reflectance
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Roof coverings on roofs or setbacks with slope equal to or less than two units vertical in 12 units horizontal (17 percent) shall have:
- A minimum initial solar reflectance of 0.7 in accordance with ASTM C 1549 or ASTM E 1918, and a minimum thermal emittance of 0.75 as determined in accordance with ASTM C 1371 or ASTM E 408; or
- A minimum SRI of 82 as determined in accordance with ASTM E 1980.
- A minimum initial solar reflectance of 0.25 in accordance with ASTM C 1549 or ASTM E 1918, and a minimal thermal emittance of 0.75 as determined in accordance with ASTM C 1371 or ASTM E 408; or
- A minimum SRI of 39 as determined in accordance with ASTM E 1980.
Exceptions:
*Section 1504.9 was amended by Local Law 94 of 2019. This law has an effective date of November 15, 2019.
- Terraces on setbacks comprising less than 25 percent of the area of the largest floor plate in the building.
- Any portion of a roof covered by a green roof system, including such a system with agricultural plantings, in compliance with Section 1507.16.
- Any portion of a roof used as outdoor recreation space by the occupants of the building that is landscaped, covered by wood decking or covered with a walking surface or other protective surface, provided that such walking surface or protective surface has a minimum initial solar reflectance of 0.3 as determined in accordance with ASTM C 1549 or ASTM E 1918.
- Ballasted roofs, provided that the ballast has a minimum initial solar reflectance of 0.2 as determined in accordance with ASTM C 1549 or ASTM E 1918.
- Any portion of a roof that is under mechanical equipment, duckboarding, decking, platform, roof tank, cooling tower or any other rooftop structure or equipment exempted by rule by the commissioner.
- Any roof or portion of a roof composed of glass, metal, clay or concrete tile or plastic/rubber intended to simulate clay or concrete tile, wood, or slate.
- Any portion of a roof used by a school or daycare center as a playground for children.
- Any roof, if the amount of rooftop space not subject to exceptions 1 through 7 is in the aggregate less than 100 square feet (9.3 m2).
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