Patent ID: 6112492
Filing Date: 2000-09-05
Classification: E04D

Abstract:
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 top surface forming an upper, headlap portion and a lower, tab portion;four additional surfaces defining a cavity under the top surface, the four additional surfaces being a first side surface extending downward from the top surface, a second side surface extending downward from the top surface, an upper end surface extending downward from the top surface, and a lowermost butt surface extending downward from the top surface, with the first and second side surfaces, the upper end surface and the butt surface all having bottom edges lying in a common plane; anda plurality of ribs within the cavity and extending downward from the top surface to the common plane, with a portion of the ribs being recessed so that they extend from the top surface to a point above the common plane.