The downward curving of the butt portion of the shingle. This creates a hump along the leading edge and a widening of the cutout. The bulge thus created is susceptible to substantial damage by wind action, hail and ice. Clawing is part of the normal aging process of shingles and is a sign of long service.

In need of a new Roof? Let the IRS help with the cost via Section 179.

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