855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 090
Extracted Content
area
Area of highre�lectance roof
Equation 1. Standard nonroof or roof calculation
Area of nonroof measures
0.5
0.75
Area of vegetated roof
≥ [Total site ]
0.5 paving area
≥ [Total site ]
paving area [+Total roof ] area
Projects are encouraged to evaluate and achieve compliance using Equation 1. If the project does not achieve the standard nonroof or roof calculations, teams may use an SRI and SR weighted average approach to calculate compliance. The weighted nonroof or roof equation weights the SR and SRI for total hardscape and roof area, showing its overall consequence on heat island effect. This equation is useful for projects that have multiple roof angles and nonroof or roof materials that fall both above and below the required SR and SRI values.
Equation 2. Weighted nonroof or roof calculation
⎛ ⎜ ⎜ ⎜ ⎜
⎠
0.75
⎞
⎟
⎟
⎟
⎟
⎟
⎟ 2
⎟
⎠
⎛
Area of high ⎜
⎜
⎞
nonroof A
⎟
re�lectance
⎞
⎞
⎟
⎟
⎟
⎟
⎟
⎟ 1
⎟
⎠
roof A
roof
roof
≥
0.5
⎜re�lectance ⎜
×
SRI of high
re�lectance
⎞
roof A
⎟
⎟
⎟
Required SR⎟
nonroof A
SR of high re�lectance
⎞
⎟
Required SR⎟
re�lectance
⎝
×
Area of other nonroof
⎛ ⎜ ⎜ ⎜ ⎜
⎛
Area of high ⎜
⎜
Area of vegetated �
roof A
measures
-
0.5
Total
site paving
⎠
0.5
area
Total
roof area
1 Summed for all high reflectance nonroof areas
2 Summed for all high reflectance roof areas
DOCUMENTATION
| Project types | Options | Paths | Documentation |
|---|---|---|---|
All | All | All | Weighted average nonroof and roof calculation |
All | All | All | Heat island reduction calculations |
All | All | All | Site plan or annotated aerial view image identifying nonroof measures, roof areas including high reflectance and vegetated areas, and hardscape areas |
All | All | All | The plant species list for the vegetated roof if applicable |
REFERENCED STANDARDS
- None
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 80