Distortion resistant roofing material

E - Fixed Constructions – 04 – D

Patent

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E04D 1/00 (2006.01) B32B 1/00 (2006.01) B32B 5/16 (2006.01)

Patent

CA 2733016

A roofing material, such as laminated shingles, comprising fines deposited on an upper surface of the roofing material, particularly on one or more non-weathering regions, such as on the headlap region, and/or shim layer. The fines may be deposited, for example, as a strip from about 0.5 inches to about 2.5 inches in width and extend the length of the roofing material at a fixed position from one edge of the roofing material to the opposite edge of the roofing material. The fines may comprise mica flakes, copper slag, coal slag, sand, talc, expanded clay, slate flour, powdered limestone or silica dust.

Linvention concerne un matériau de couverture, tels que des bardeaux stratifiés, comprenant des fines déposées sur une surface supérieure du matériau de couverture, en particulier sur une ou plus zones non exposées aux intempéries, telles que sur la zone de recouvrement, et/ou une couche de cale. Les fines peuvent être déposées, par exemple, comme une bande denviron 0,5 pouce à environ 2,5 pouces de largeur et étendre la longueur du matériau de couverture dans une position fixe dun bord du matériau de couverture au bord opposé du matériau de couverture. Les fines peuvent comprendre des paillettes de mica, des scories de cuivre, du laitier de charbon, du sable, du talc, de largile expansée, de la poudre dardoise, de la poudre de carbonate de chaux ou de la poussière de silice.

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