§ 1504 — PERFORMANCE REQUIREMENTS

SECTION 1504 PERFORMANCE REQUIREMENTS

* * * [Add Section B-1504.9 as follows:] B-1504.9 Reflectance. Roof Coverings over conditioned spaces on low-slope roofs (roof slope < 2:12) on newly constructed buildings and additions to existing buildings shall be rated by the Cool Roof Rating Council as having: 1. a minimum three-year aged solar reflectance of 0.62 and minimum three-year aged thermal emittance of 0.75; or, 2. a minimum Solar Reflectance Index of 75. Exceptions: 1. An addition to a roof that supports living vegetation and includes a synthetic, high quality waterproof membrane, drainage layer, soil layer and light weight medium plants shall be permitted to comprise part or all of the roof area. 2. Walking surfaces of occupiable rooftops. 3. An area including and adjacent to rooftop photovoltaic and solar thermal equipment, totaling not more than three times the area that is covered with such equipment. 4. Limited roof areas as determined by regulations promulgated by the Department of Licenses and Inspections. 5. A roof, the area of which is less than three (3) percent of the gross floor area of the building. 6. 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. * * *