Importance

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Abstract

A roof surfacing having increased reflectance comprises a roof membrane with a bituminous layer and a layer of generally flat particles placed in a generally overlapping geometry so as to substantially cover the bituminous layer. The composition of the particles includes a polymer and a filler. The polymer may be polyvinyl acetate (PVA), polyvinyl chloride (PVC), polyester, acrylic, polymethylmethacrylate, or methylmethacrylate (MMA). The filler may be calcium carbonate, dolomite, or barium sulfate. The particles may further include a pigment, fire retardant, and/or anti-microbial agent. A method of creating a roof surfacing having increased reflectance includes creating a thin sheet of material having increased reflectance, dividing that sheet into multiple particles, feeding the particles through a hopper onto a curved directional plate, and placing the particles on a roof membrane having a molten bituminous layer in a generally horizontal direction to create an overlapping, scaled appearance.

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First Claim