Duro-Last Roofing Inc. - Roofing System For us, "white" refers to the bright white Cool Zone roofing membrane. It has an initial reflectivity of 87.5%, based on ENERGY STAR testing procedures. Reflectivity is the percentage of the sun's energy that is reflected by a surface. Another important measurement of membrane performance is emittance — the percentage of absorbed energy that a material can radiate away. The Cool Zone system's total emittance is measured at 95%. |
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