Foamed asphalt weathering sheet for roll roofing, siding, or shingles
AssigneeOwens-Corning Fiberglas Corporation
InventorSanford K. Lauderback
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Abstract
In a continuous weathering sheet manufacturing process wherein fibrous mat material is coated with liquid asphalt, the asphalt is foamed before coating the mat therewith.
Claims4
In a continuous process of manufacturing weathering sheet of the type used in products such as roll roofing, strip shingles, and siding, said process including coating a preformed flexible fibrous mat on both sides with liquid asphalt, the improvement comprising foaming the liquid asphalt before coating the mat therewith.
A foamed-asphalt weathering sheet of the type used in products such as roll roofing, strip shingles, and siding, said sheet comprising a fibrous mat embedded in foamed asphalt.
Dependencies are inferred from the claim text.