Importance

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Abstract

A trilaminated roofing shingle comprising: (a) an anterior layer consisting essentially of a rectangular, granular surfaced shingle sheet having an undivided headlap portion and a butt portion comprising a plurality of tabs of an average given breadth separated by spaces approximately 0.50 to 1.25 the breadth of a tab; (b) a middle layer consisting essentially of a longitudinally coextensive rectangular, granular surfaced shingle sheet of an overall width up to equal the width of the anterior layer, having the same number of tabs of complementary configuration as those of (a), said tabs of (b) uniformly larger in breadth or breadth and height with respect to the tabs of (a) but insufficient to fill the spaces between the tabs of (a), so as to allow spaces between tabs of (b) when assembled, middle layer (b) being attached to the undersurface of anterior layer (a) in a manner such that the tabs of (b) are centered under the tabs of (a) and partially fill the spaces between the tabs of (a) and (c) a posterior layer of an undivided, longitudinally coextensive rectangular strip exposable through and filling the spaces and having granules on its surface in at least its exposed areas, strip (c) having a width greater than the height of the tabs of (b) and being attached to the undersurface of (b).

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First Claim