Int. No. 1087
By Council Members Garodnick, Brewer, Chin, Comrie, Ferreras, Fidler, Gonzalez, James, Koo, Koppell, Lander, Mark-Viverito, Mendez, Rose, Van Bramer and Ulrich
A Local Law to amend the New York city building code, in relation to using cool roof surfaces to reduce summer heat.
Be it enacted by the Council as follows:
Section 1. Section BC 1504.8 of the New York city building code is amended to read as follows:
1504.8 Reflectance. Roof coverings on roofs or setbacks with slope equal to or less than two units vertical in 12 units horizontal (17 percent) shall have:
1. a minimum initial solar reflectance of 0.7 in accordance with ASTM C1549 or ASTM E 1918, and a minimum thermal emittance of 0.75 as determined in accordance with ASTM C1371 or ASTM E 408; or
2. a minimum SRI of 78 as determined in accordance with ASTM E 1980.
Roof coverings on roofs or setbacks with slope greater than two units vertical in 12 units horizontal (17 percent) shall have a minimum SRI of 25 as determined in accordance with ASTM E1980.
ยง 2. This local law shall take effect on January 1, 2014.
JCH
6/21/2013 12:48 PM