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LEED O+M: Existing Buildings | v2 - LEED 2.0

Heat island reduction - roof

SSc6.2 | Possible 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 A
  • Have in place over the performance period ENERGY STAR®–compliant, high-reflectance and high emissivity roofing material that has a minimum emissivity of 0.9 when tested in accordance with ASTM 408 for a minimum of 75% of the roof surface.
  • Provide records and results of quarterly inspections over the performance period to determine that these features are being maintained.
Option B
  • Install/maintain a “green” (vegetated) roof for at least 50% of the roof area.
  • Provide records and results of quarterly inspections over the performance period to determine that these features are being maintained.

Combinations of roofing materials that meet the requirements of Option A and Option B can be used providing they collectively cover the designated area. See the LEED for Existing Buildings Reference Guide for guidance on calculating achievement of credit requirements based on using a combination of Option A and B roofing materials.

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