Air Force sheild Sustainability Toolkit
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LEED Guidance

 

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LEED section image
  LEED Guidance
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SS Credit 7.1
SS Credit 7.1: Heat Island Effect: Non-Roof
1 Point

Intent
Reduce heat islands (thermal gradient differences between developed and undeveloped areas) to minimize impact
on microclimate and human and wildlife habitat.

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

OR

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.

Potential Technologies & Strategies
Shade constructed surfaces on the site with landscape features and utilize high-reflectance materials for hardscape.
Consider replacing constructed surfaces (i.e. roof, roads, sidewalks, etc.) with vegetated surfaces such as vegetated
roofs and open grid paving or specify high-albedo materials to reduce the heat absorption.

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 for New Construction v2.2 Reference Guide.