Emissivity is a material s ability to release absorbed energy.
Sri roofing materials.
The solar reflectance index or sri is a calculation using the aged solar reflectance and thermal emittance measurements of the asphalt shingles materials.
Sri lanka s marketplace for roofing materials is here to help you choose the best roofing products suppliers and brands for any construction site.
The solar reflectance index is used for compliance with leed.
This measurement can be used as an indicator of how hot shingles are likely to become when they re exposed to the sun.
It ranges from 0 to 100.
It stands for solar reflectance index which is a combination of two numbers a material s emissivity a measure of how effectively it rejects heat and reflectivity how much light energy it bounces back.
Requirements and is calculated according to astm e 1980 using values for reflectance and emissivity.
Berridge s kynar 500 hylar 5000.
So just what is sri.
Hotline 077 255 0770 office hours weekdays 9 00am to 5 00pm saturdays 9 00am to 1 00pm head office no 752 baseline road colombo 09.
The high reflectivity emissivity and solar reflectance index sri of berridge metal roofing helps mitigate the heat island effect.
Cool roofing products are classified in many cases by their solar reflectance index sri.