A calculated index (0 – 100+ based on ASTM E 1980) which combines a surface material’s solar reflectance and infrared emittance into a single value. The SRI provides a relative indication of how hot a surface material will become when exposed to sunlight. Cool surfaces have high index values while hot surfaces have low index values.

SPFA believes that the path to a healthful, safe, high-quality and performing SPF installation travels through the hands of a knowledgeable, trained, experienced, and ideally PCP-certified professional contractor.