855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 088
Extracted Content
o Structures covered by energy generation systems, such as solar thermal collectors,
photovoltaics, and wind turbines.
o Architectural devices or structures. If the device or structure is a roof, it shall have an
aged SR value of at least 0.28 as measured in accordance with ANSI/CRRC S100 . If the device or structure is not a roof, or if aged SR information is not available, it shall have an initial SR of at least 0.33 as measured in accordance with ANSI/CRRC S100 .
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Use paving materials with an initial SR value of at least 0.33.
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Create an open-grid pavement system (at least 50% unbound).
High-Reflectance Roof
Use roofing materials that have an aged solar reflectance index (SRI) value equal to or greater than the values in Table 1. If an aged SRI is not available, the roofing material shall have an initial SRI equal to or greater than the values in Table 1.
Table 1. Minimum solar reflectance index value, by roof slope
| Col1 | Slope | Initial SRI | Aged SRI |
|---|---|---|---|
| Low-sloped roof | ≤ 2:12 | 82 | 64 |
Steep-sloped roof | > 2:12 | 39 | 32 |
A roof area that consists of functional, usable spaces (such as helipads, recreation courts, and similar amenity areas) may meet the requirements of nonroof measures. Applicable roof area excludes roof area covered by mechanical equipment, solar energy panels, skylights, and any other appurtenances.
Vegetated Roof
If newly installed, sufficient growing medium and plant material must be in place to provide full vegetative cover within three years.
REQUIREMENTS EXPLAINED
This credit encourages the use of combined strategies that minimize a project’s overall contribution to the heat island effect. This includes both nonroof and roof measures such as reducing hardscape, incorporating high solar reflectance index (SRI) or high solar reflectance (SR) materials, increasing tree cover, and implementing vegetation across the site. SRI is used to measure a roofing material’s ability to reject solar heat, while SR is used to measure the solar heat rejection of hardscape materials. Projects pursuing this credit should review the building
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 78