Leed requires a roofing material to have a value of 29 or higher for a steep roof pitch 2 12 and 78 or higher for a roof pitch 2 12.
Solar reflectance index metal roofing.
Requirements and is calculated according to astm e 1980 using values for reflectance and emissivity.
The guide to choosing a cool roof.
Urban heat island a built environment where the large portion of dark absorbing.
New technology helps to close the gap between aesthetics and solar reflectance.
Berridge metal roofing is cool and sustainable the high reflectivity emissivity and solar reflectance index sri of berridge metal roofing helps mitigate the heat island effect.
The cool metal roofing paint resin formula formulated by sherwin williams or another paint supplier contains innovative solar reflective pigments which is the key differentiator.
Emissivity is a material s ability to release absorbed energy.
Darker colors like dark brown have an average solar reflectance of 5 9 while white granules have a solar reflectance of 31 3.
Also important characteristic to a metal building panel color is the ability of the panel to release absorbed energy called emissivity.
Installing a cool roof can cut your energy costs while contributing toward a better environment.
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.
By lessening the demand for energy it decreases carbon emissions that cause pollution.
Reflected solar energy allows the roof surface to remain cooler which means less heat is transferred into the building.
Berridge s kynar 500 hylar 5000.
The solar reflectance index is used for compliance with leed.
Cool metal roofing coated with kynar 500 based resin is one way to limit the urban heat island effect.
To meet leed requirements a roofing material must have a sri of 29 or higher for steep slope 2 12 roofing and a sri value of 78 or higher for low slope roofing.
This is called the solar reflectivity index sri.
Furthermore it doesn t store as much thermal energy as an ordinary roof.
Cool metal roof colors are optimal for reducing energy consumption particularly where cooling loads dominate.
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.
Kynar 500 based painted metal roofing can achieve solar reflectance of over 70.
