SRI Tile

The Solar Reflectance Index (SRI) is the measure of solar reflectance and thermal emissivity of materials. Solar reflectance or reflectivity is the ability of a material to reflect solar energy from its surface into the atmosphere. Emissivity is a material’s ability to release absorbed energy.

SRI is used to indicate how hot a material is likely to become when its surface comes into contact with solar radiation. On a scale of 0 to 100, standard black is 0, and standard white is 100. According to this scale, testing indicates that absorbent materials have lower numbers while reflective materials have higher numbers.

Using SRI To Evaluate a Cool Roof
Cool roofs stay cool in the sun by minimizing solar absorption and maximizing thermal emittance. This technology offers numerous benefits, including increased savings on annual electricity bills, reduced roof maintenance, and replacement expenses, as well as reduced “heat island effect” in cities and suburbs. A few important measurement terms will come up when incorporating a cool roof into a property or design, including solar reflectance, emissivity, and SRI.