Solar Reflectance Index Metal Roofing
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Also important characteristic to a metal building panel color is the ability of the panel to release absorbed energy called emissivity.
Solar reflectance index metal roofing. By lessening the demand for energy it decreases carbon emissions that cause pollution. Furthermore it doesn t store as much thermal energy as an ordinary roof. The benefits of cool metal roofing cool metal roofing has many benefits beyond savings on energy costs. Cool metal roofing coated with kynar 500 based resin is one way to limit the urban heat island effect.
Many homeowners elect a balance between solar reflectance and aesthetics. 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. Berridge s kynar 500 hylar 5000. Kynar 500 based painted metal roofing can achieve solar reflectance of over 70.
Reflected solar energy allows the roof surface to remain cooler which means less heat is transferred into the building. Heat island effect roof. Darker colors like dark brown have an average solar reflectance of 5 9 while white granules have a solar reflectance of 31 3. Requirements and is calculated according to astm e 1980 using values for reflectance and emissivity.
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. This is called the solar reflectivity index sri. The guide to choosing a cool roof. Emissivity is a material s ability to release absorbed energy.
Cool metal roof colors are optimal for reducing energy consumption particularly where cooling loads dominate. 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. Installing a cool roof can cut your energy costs while contributing toward a better environment. The solar reflectance index is used for compliance with leed.
New technology helps to close the gap between aesthetics and solar reflectance. Urban heat island a built environment where the large portion of dark absorbing.