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A roofing shingle includes organic, resinous material and an inorganic filler material, the single having a top surface, two side surfaces, an upper end, and a lower or butt end, defining a cavity on the underside of the shingle, with ribs positioned within the cavity. When applied to a roof, the sh

A roofing shingle includes organic, resinous material and an inorganic filler material, the single having a top surface, two side surfaces, an upper end, and a lower or butt end, defining a cavity on the underside of the shingle, with ribs positioned within the cavity. When applied to a roof, the shingle has the appearance of wooden shake shingle and provides a Class A fire barrier when tested according to A

대표청구항 ▼

[ We claim:] [1.] A roofing shingle made from a composition comprising an organic, resinous material and an inorganic filler material, the roofing shingle having a structure comprising: (a) a top surface forming an upper, headlap portion and a lower, tab portion; (b) means defining a cavity under sa

[ We claim:] [1.] A roofing shingle made from a composition comprising an organic, resinous material and an inorganic filler material, the roofing shingle having a structure comprising: (a) a top surface forming an upper, headlap portion and a lower, tab portion; (b) means defining a cavity under said top surface, said means defining a cavity comprising a first side surface extending downward from said top surface and having a bottom edge, a second side surface extending downward from said top surface and having a bottom edge, an upper end surface extending downward from said top surface and having a bottom edge, and a butt end surface extending downward from said top surface and having a bottom edge, said bottom edges of the first side surface, the second side surface, the upper end surface and the butt end surface generally lying in a common plane, wherein the structure has a generally rectangular perimeter defined by said first side surface, said second side surface, said upper end surface and said butt end surface, with the headlap portion having an upper end defined by the upper end surface and the tab portion having a lower end defined by the butt end surface; (c) a plurality of ribs within said cavity and extending downward from said top surface, said plurality of ribs including supporting ribs extending from said top surface to said common plane and recessed ribs under said tab portion extending from said top surface to a point above said common plane; (d) at least one strip in the headlap portion for receiving fasteners; (e) a grooved break line between and parallel to said first and second side surfaces extending from said upper end to a midpoint between the upper end and the lower end; and (f) a cutout portion between and parallel to said first and second side surfaces extending from said midpoint to said lower end.