Providing roofs with a reflective surface is not a new concept. For example, asphalt coatings with leafing aluminum pigment have always promoted the benefit of reducing interior temperatures while slowing the oxidation of the waterproofing membrane. However, the term ‘cool roofing’ was more recently coined with the increased focus on the reduction of energy consumption. This article examines options from built-up roofs (BURs) to modified-bitumen (mod-bit) systems to single-ply membranes.
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