Solar Reflectance Index Roof Shingles

Solar reflectance index sri.

Solar reflectance index roof shingles.

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. The sr value is a number from 0 to 1 0. 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. Shasta white color meets energy star requirements for initial solar reflectance of 0 25 and 3 year aged solar reflectance of 0 15.

Timberline hd reflector series plus shingles meet green building standards code of los angeles county for residential buildings. The third metric used to measure the performance of cool roof coverings is called the solar reflectance index sri. 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. Feature gaf proprietary color blends and enhanced shadow effect for a genuine wood shake look.

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. It ranges from 0 to 100. Solar reflectivity or reflectance is the ability of a material to reflect solar energy from its surface back into the atmosphere. A value of 0 indicates that the material absorbs all solar energy and a value of 1 0 indicates total reflectance.

Solar reflectivity r solar reflectance index sri by color. 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. See actual warranty for complete details limitations and requirements. 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.

Incorporates both solar reflectance and thermal emissivity in a single value. Rated by the cool roof rating council crrc. This measure is calculated from the tsr and te. Timberline hd reflector series plus shingles are rated by.

2013 california building energy efficiency standards title 24 part 6 requirements. The higher the sri the cooler the roof will be. The solar reflectance index or sri is a calculation using the aged solar reflectance and thermal emittance measurements of the asphalt shingles materials. The coolness of the roof is measured by two properties.

This measurement can be used as an indicator of how hot shingles are likely to become when they re exposed to the sun.