Materials used to weatherproof the exterior top surface of a structure.
IBC has requirements of fire resistance by occupancy.
Class A = Severe
Class B = Moderate
Class C = Light
Inverted Roof Membrane Assembly (IRMA): A flat roof in which the thermal insulation is placed above the waterproofing membrane. Insulation protects the membrane from the UV radiation, Also eliminates risk of interstitial condensation.
Albedo: Extent to which an object diffusely reflects light from the sun. Defined as the ratio of diffusely reflected to incident electromagnetic radiation.
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