Extreme Blistered Roof Shingles

There are two main reasons that asphalt shingles blister.

Extreme blistered roof shingles. While undergoing the lamination process moisture can be trapped between layers. The shingles are composed of different layers of material. Blistering only occurs in asphalt roof shinglesas it is a byproduct of manufacturing or installation. Items that penetrate the roof are by far the most common source of leaks.

Poor or inefficient ventilation causing the shingles to reach excessive temperatures over 60 c. Typically asphalt shingles only blister where the exposure conditions on the roof include one or more of the following. Blisters are typically small steep sided craters measuring a quarter inch 6mm or less in diameter with no granules visible in the crater. Penetrations can include plumbing and roof vents chimneys dormers or anything else that projects through the roof.

Blistering shingles are a common problem with asphalt shingles. The roofing company co takes a look at what causes asphalt shingles to blister and what can be done to prevent it. Loss of gravel granules or another surfacing membrane deterioration blisters in seams which have reduced lap coverage blisters that have breaks that can. The first thing to look for is any roof penetrations.

Shingles is a viral infection that causes a painful rash. Item 10076 model 671428. In the photo shown here some blister tops have lost granules and are beginning to expose the shingle interior substrate. 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.

Owens corning oakridge 32 8 sq ft estate gray laminated architectural roof shingles. 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. 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.

Our photo left shows blisters on an atlas brand asphalt shingle roof in georgia. In fact it s rare for leaks to develop in open areas of uninterrupted shingles even on older roofs. Blisters or blister rash can be identified by inconsistent bubbles rising up from inside the shingle.