Solar Reflective Index combines reflectance and thermal emittance. Owens Corning reports values for specified Duration colors and plant service areas, with different information for California production
Owens Corning technical bulletin: Solar Reflectivity Technical Bulletin.
What this means for your roof
Solar Reflective Index combines reflectance and thermal emittance. Owens Corning reports values for specified Duration colors and plant service areas, with different information for California production. A light-looking shingle does not establish a particular rating or a guaranteed household energy saving.
A useful question for your contractor
Ask for the rating of the exact color and production source being supplied.
Ask for the answer to be tied to the actual roof condition and the exact product being installed. Keep the agreed repair or installation detail with your estimate and project photos.
Bulletin dated: June 2025. The date shown identifies the manufacturer document used for this summary.
Read Owens Corning: Solar Reflectivity Technical Bulletin
This homeowner summary explains the cited bulletin. The complete manufacturer document and current product instructions govern the installation details. A requirement for one manufacturer or product should not be transferred to another without checking.