CPC E04D 1/365 (2013.01) [E04D 1/20 (2013.01); E04D 2001/005 (2013.01)] | 30 Claims |
1. A roofing system, comprising:
a roof deck; and
a roofing shingle installed above the roof deck,
wherein the roofing shingle comprises:
a first shingle layer;
a second shingle layer,
wherein the first shingle layer and the second shingle layer overlap to form a common bond area;
a first attachment between the first shingle layer and the second shingle layer,
wherein the first attachment is in the common bond area,
wherein the first attachment comprises a first indentation in the first shingle layer,
wherein the first indentation has:
a depth at most 90% of a thickness of the common bond area,
a radius of about 1/16 inch to about ⅝ inch, and
a width of about ⅛ inch to about ¾ inch; and
a second attachment between the first shingle layer and the second shingle layer,
wherein the second attachment is in the common bond area,
wherein the second attachment comprises a second indentation in the first shingle layer,
wherein the roofing shingle has a back and a top opposite the back,
wherein the first indentation and the second indentation are in the back,
wherein the roofing shingle, when tested by a standardized shingle bundle handling test at 120 degrees Fahrenheit, has either
less than 3 cracks through to the top, or
less than 3 surface cracks in the back.
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