Heat Island Effect: Non-Roof

LEED 2.2 Requirements:

OPTION 1
Provide any combination of the following strategies for 50% of the site hardscape (including roads, sidewalks, courtyards and parking lots):

• Shade (within 5 years of occupancy)
• Paving materials with a Solar Reflectance Index (SRI)* of at least 29
• Open grid pavement system

OPTION 2
Place a minimum of 50% of parking spaces under cover (defined as under ground, under deck, under roof, or under a building). Any roof used to shade or cover parking must have an SRI of at least 29.

* The Solar Reflectance Index (SRI) is a measure of the constructed surface's ability to reflect solar heat, as shown by a small temperature rise. It is defined so that a standard black (reflectance 0.05, emittance 0.90) is 0 and a standard white (reflectance 0.80, emittance 0.90) is 100. To calculate the SRI for a given material, obtain the reflectance value and emittance value for the material. SRI is calculated according to ASTM E 1980-01. Reflectance is measured according to ASTM E 903, ASTM E 1918, or ASTM C 1549. Emittance is measured according to ASTM E 408 or ASTM C 1371. Default values for some materials will be available in the LEED-NC v2.2 Reference Guide.

Submittals (CONSTRUCTION):

Provide project site drawings, highlighting the location of specific paving materials, landscape shading, and/or underground or covered parking.  In addition, please provide the following based on the appropriate compliance path:

Option 1

• Provide the measured reflectance and emittance of each paving material installed on-site (to calculate SRI) - OR - the actual SRI for each paving material installed on-site - OR - the default SRI value for typical materials from Table 1 (p. 91 LEED Reference Manual).
• Provide total area of non-roof hardscape surfaces on the project site.
• Provide total area of all hardscape surfaces with open-grid paving that are at least 50% pervious.
• Provide total effective shades area of hardscape features shaded by tress or other landscape features.
• Provide total area of hardscape features having an SRI of at least 29.

Option 2

• Provide total number of parking spaces provided on-site.
• Provide total number of parking spaces that are under cover (underground, under building/shade structures).
• AND (For Projects With Special Circumstances - Either Compliance Path) - Provide an optional narrative to describe any additional comments or notes regarding special circumstances or considerations regarding the project's credit approach.