To measure the constructed surfaces ability to stay cool in the sun by
reflecting solar radiation and emitting thermal radiation.
It will be assessed on
Computing the SRI and roof surface temperature based on solar
reflectance and thermal emittance using ASTM standard E 1980.
Reflectance is measured according to ASTM E 903, ASTM E 1918, or ASTM C
1549. Emittance is measured according to ASTM E408 or ASTM C 1371.
How it will be evaluated
SRI can be calculated based on the pitch of a roof, its weight, its
solar reflectance and its thermal emittance (emissivity).
Vegetation will be evaluated based on the planted species and their
Concepts to be evaluated
- Cool Roofs.
- Light colors on the outside of buildings.