Dual layer shingle

Details Dual layer shingle Dual layer shingle

E - Fixed Constructions

04

D

E04D 1/22 (2006.01) B05D 7/00 (2006.01) B32B 11/02 (2006.01) C09D 153/02 (2006.01) C09D 195/00 (2006.01) E04B 2/00 (2006.01) E04D 1/28 (2006.01)

Patent

CA 2487474

A shingle formed from a base sheet, with a layer of polymer modified asphalt coating the top of the base sheet, and a layer of conventional oxidized asphalt, free from polymer additives, coating the bottom of the base sheet. Both layers preferably directly contact the strands of the base sheet for good adhesion. This improves the strength, flexibility and ultraviolet resistance of the shingle, while reducing the cost as compared with a shingle which utilized only polymer modified asphalt, and in addition it increases the stiffness of the shingle as compared with one using only polymer modified asphalt.

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