Extreme Blistered Roof Shingles

Shingles is a viral infection that causes a painful rash.

Extreme blistered roof shingles.

In fact it s rare for leaks to develop in open areas of uninterrupted shingles even on older roofs. Items that penetrate the roof are by far the most common source of leaks. Blisters are typically small steep sided craters measuring a quarter inch 6mm or less in diameter with no granules visible in the crater. Item 10076 model 671428.

Blistering shingles are a common problem with asphalt shingles. In the photo shown here some blister tops have lost granules and are beginning to expose the shingle interior substrate. Blistering is an asphalt shingle roofing problem that is often mistaken for hail damage and is one of the most common issues residential roofing contractors are called to fix especially during the summer. Although shingles can occur anywhere on your body it most often appears as a single stripe of blisters that wraps around either the left or the right side of your torso.

There are two main reasons that asphalt shingles blister. Typically asphalt shingles only blister where the exposure conditions on the roof include one or more of the following. The first thing to look for is any roof penetrations. Blistering only occurs in asphalt roof shinglesas it is a byproduct of manufacturing or installation.

Our photo left shows blisters on an atlas brand asphalt shingle roof in georgia. Poor or inefficient ventilation causing the shingles to reach excessive temperatures over 60 c. Blisters in shingles or rash blisters are a cosmetic defect in the opinion of some roofing manufacturers and an indicator of reduced shingle life in the opinion of some building professionals. As the air heats up the shingles the trapped moisture heats and can cause blisters to rise up on the shingle.

While undergoing the lamination process moisture can be trapped between layers. Shingles is caused by the varicella zoster virus the same virus that causes chickenpox. In at least some cases blistered asphalt shingles are more easily converted to pitted shingles by foot traffic hail and in some cases during the course of aging but before the end of the shingle warranty period. Penetrations can include plumbing and roof vents chimneys dormers or anything else that projects through the roof.

Loss of gravel granules or another surfacing membrane deterioration blisters in seams which have reduced lap coverage blisters that have breaks that can. If the shingles on a roof have trapped moisture they are highly likely to start blistering. The roofing company co takes a look at what causes asphalt shingles to blister and what can be done to prevent it.