The Cool Roof Rating Council was created in 1998 to develop accurate and credible methods for evaluating and labeling the solar reflectance and thermal emittance of roofing products and to disseminate the information to all interested parties.
It is an independent and non-biased organization that has established a rating system for displaying accurate radiative property data on the outermost layer of roof surfaces.
Many products rated with the CRRC may improve the energy efficiency of buildings while positively impacting our environment.
At the heart of the CRRC is its Product Rating Program in which roofing manufacturers can label various roof surface products with radiative property values rated under a strict program administered by the CRRC. The CRRC does not set a minimum definition of “Cool”. This is left to the code bodies and programs that reference the CRRC rating system.
A cool roof may be defined differently by different codes or programs. In simple terms a cool roof reflects and emits the sun’s heat back to the sky instead of transferring it to the building below.
“Coolness” is measured by two properties, solar reflectance and thermal emittance. Both properties are measured on a scale of 0 to 1 and the higher the value, the “cooler” the roof.