Two element shingle
AssigneeCertainTeed Corporation
InventorsLouis A. Terrenzio, Michael J. Noone, Husnu M. Kalkanoglu
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Abstract
A decorative shingle has a first element including a reinforcing web, a first asphaltic binder, and a first adherent surfacing material. A second element including discontinuous sections is overlaid on the first element. The second element includes a layer of a second asphaltic binder and a second adherent surfacing material to provide a decorative effect. The second asphaltic binder has greater elongation at low temperature than the first asphaltic binder, providing greater resistance to environmental stresses.
Claims6
A shingle comprising:
- a) a first element including a reinforcing web, a first asphaltic binder, and a first adherent surfacing material, and
- b) a second element overlaid on the first element, the second element including a layer of second asphaltic binder and a second adherent surfacing material, the layer of second asphaltic binder being sufficiently extensible to elongate in a crack-free manner when the shingle is subjected to a strain of at least 1 percent at a temperature of -1.degree. C. after aging at 70.degree. C. for two weeks, the second element comprising a plurality of discontinuous sections.
A shingle having a backcoating, the shingle comprising:
- a) a first element including a reinforcing web, a first asphaltic binder having a predefined cracking temperature, and a first adherent surfacing material, and
- b) a second element overlaid on the first element, the second element including a layer of second asphaltic binder and a second adherent surfacing material, the layer of second asphaltic binder having a predefined cracking temperature, the predefined cracking temperature of the second asphaltic binder being lower than the predefined cracking temperature of the first asphaltic binder, the cracking temperature being measured by a three point bend test in which a normal force is applied to the backcoating of the shingle, the second element comprising a plurality of discontinuous sections.
Dependencies are inferred from the claim text.