Solar Reflectance Index Roof Shingles

Feature gaf proprietary color blends and enhanced shadow effect for a genuine wood shake look.

Solar reflectance index roof shingles.

Timberline hd reflector series plus shingles meet green building standards code of los angeles county for residential buildings. Solar reflectance index sri. Incorporates both solar reflectance and thermal emissivity in a single value. It ranges from 0 to 100.

2013 california building energy efficiency standards title 24 part 6 requirements. The higher the sri the cooler the roof will be. Rated by the cool roof rating council crrc. The solar reflectance index sri is a measure of the constructed surface s ability to reflect solar heat as shown by a small temperature rise.

For example a standard black asphalt shingle would have an sri in the low single digits. It is defined so that a standard black surface reflectance 0 05 emittance 0 90 is 0 and a standard white surface reflectance 0 80 emittance 0 90 is 100. The solar reflectance index or sri is a calculation using the aged solar reflectance and thermal emittance measurements of the asphalt shingles materials. Solar reflectivity or reflectance is the ability of a material to reflect solar energy from its surface back into the atmosphere.

Timberline hd reflector series plus shingles can be used to comply with 2016 title 24 part 6 cool roof requirements of the california code of regulations. Presidential shake solaris in the color autumn blend can reflect up to 18 percent of the sun s energy. The sr value is a number from 0 to 1 0. The landmark solaris platinum solar reflective shingles represent an industry breakthrough in technology achieving a level of 40 solar reflectivity by far the highest level of reflectivity in the asphalt shingle industry.

Shasta white color meets energy star requirements for initial solar reflectance of 0 25 and 3 year aged solar reflectance of 0 15. The third metric used to measure the performance of cool roof coverings is called the solar reflectance index sri. Meet the prescriptive solar reflectance and thermal emittance requirements according to the 2016 title 24 standards are rated by the cool roof rating council and meet the cool roof requirements of the los angeles green building code find out more about title 24 here. A value of 0 indicates that the material absorbs all solar energy and a value of 1 0 indicates total reflectance.

Sri measures the roof s ability to reject solar heat defined such that a standard black reflectance 0 05 emittance 0 90 is 0 and a standard white reflectance 0 80 emittance 0 90 is 100. See actual warranty for complete details limitations and requirements. Timberline hd reflector series plus shingles are rated by. Solar reflectance sr or reflectivity or the fraction of solar energy that is reflected by the roof and thermal emittance or the relative ability of the roof surface to radiate absorbed heat or a combination of the two called the solar reflective index sri.

This measure is calculated from the tsr and te.