Are My Shingles Defective?

Composition shingles are made up of 3 components: a reinforcing mat (either glass-fiber or organic paper), an asphalt or polymer-modified coating or saturation and a layer of granules (small rocks, most with ceramic coating to achieve a certain color).  Sometimes factory manufacturing problems occur such as: localized granule loss & spot defects, blisters and cupping & clawing.

Most shingle manufacturers have a 5 year warranty for defective material.  We can help facilitate a warranty claim, give us a call today at 308-532-3546!

Granule Loss & Spot Defects

Granule loss due to manufacturing anomalies exhibit in a distinctive pattern.  Shingles will lose granules naturally due to age, but the loss is uniform over the entire slope or roof.  A large area without granules indicates a manufacturing defect.  Spot defects are areas where granules were never bonded.  What might initially look like hail damage was actually a spot defect caused by material on a setting roller during the manufacturing process (the setting roller embeds granules into coating asphalt).  Sometimes spot defects occur at regular intervals and sometimes they do not.

Blisters

Blisters are caused when volatiles within the coating asphalt or moisture from the shingle mat vaporize when heated. Trapped vapors create bubble-like forms, or blisters, in the asphalt. As such, blisters are a function of asphalt quality and shingle temperature. Over time, blisters rupture and expose the underlying asphalt and reinforcement. Open blisters leave circular voids (missing granules and asphalt) in the surface of the shingle. Blisters do not fracture the shingle mat. Composition shingles are made of a reinforcement (called mat) and a water-proofing binder (asphalt or modified bitumen) with a surfacing of granules.  This is a manufacturing defect from the factory.

Cupping & Clawing

Cupping occurs when the top surface of the shingle shrinks relative to the bottom surface.  Clawing (downward) occurs when the bottom of the shingle shrinks relative to the top of the shingle.  There conditions are not caused by wind or hail.

Shingle Curling shingle cupping

Check out some more photos.  If you shingles are in fact defective, exploring the warranty from the manufacturer is a good route.  Most shingle manufacturers have a 5 year warranty for defective material.  We can help facilitate a warranty claim, give us a call today at 308-532-3546!

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