Why is our brand name COOLSOURCE important to you? Please let us explain -
Buildings consume one-third of all energy and two-thirds of all electricity generated. Cool roofs can help reduce energy consumption by lowering cooling loads. Lightly colored, more reflective roofs save up to 40% in cooling energy, as reported by the Heat Island Group of Lawrence Berkeley National Laboratory. Highly emissive roofs can lower urban air temperatures, there by benefiting the environment by reducing smog formation.
Reflectivity and Emissivity
ENERGY EFFICIENCY
A building’s cooling and heating costs can be effectively reduced by insulation under the roof surface. Adding increasing amounts of insulation is not always the best way to save energy. As part of total system design, a cool metal roof can be an economical method for better energy efficiency.
Cool metal roofing is available with oven-baked paint finishes. This family of roofing can achieve solar reflectance of over 70 percent and emissivity ratings as high as 90 percent. Reflected solar energy allows the roof surface to remain cooler, which means less heat is transferred into the building. The infrared emittance of a roof is a measure of absorbed solar radiation that is reemitted from the roof surface to the sky. Emittance of metal roofing varies with the surface finish. Emittance of painted metal roofing can be as high as 90 percent, while plain finishes emissivity rating is 8—15 percent.
IMPORTANT—FOR SOUTHERN USA
Where annual cooling loads dominate, a highly reflective and highly emissive painted metal roof is optimal for reducing energy consumption.
Where annual heating loads dominate, an unpainted metal roof is more desirable because of its low infrared emittance.
Refer to coolmetalroofing.com for more info.
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