Shingle Blisters Roof

Since each course consists of two layers of shingles blisters will not evolve into leaks but they may cause premature deterioration of the appearance of the roof if they re large and widespread.

Shingle blisters roof. The shingles are composed of different layers of material. During the manufacturing process moisture gets trapped within the shingle itself. Although the atlas view is reassuring based on field observation and experience and visible in beginning stages in the photo of an atlas roof shingle above we ve seen early granule loss at the blister site. In some cases moisture can get trapped within the shingles during the manufacturing process.

Typically asphalt shingles only blister where the exposure conditions on the roof include one or more of the following. Also if a roof does not have proper ventilation shingles can blister because of intense heat. Moisture in the shingle material occasionally moisture can become trapped within the layers of asphalt shingles as they are being manufactured. Blisters are typically small steep sided craters measuring a quarter inch 6mm or less in diameter with no granules visible in the crater.

Hinkle roofing your local roofing contractor discusses what causes asphalt shingles to blister and what you can do about it. Asphalt shingles can blister as a result of trapped moisture in the shingles. Shingle blistering as a roof defect. What are blistering roof shingles.

The cluster of blisters that form with shingles fill with fluid pop then start to ooze. A roof that is experiencing many small bubbles is said to have shingle rash like skin blisters these are also filled with either water or gas that originates from one of two places. While on some roofs blistered shingles may last at least as long as the shingle warranty period in other cases especially if the blistered roof is exposed to mechanical damage being walked on for example or other challenging exposure conditions the blisters may play a role in roof wear and roof life as we elaborate below. So at least on some roof shingles rash blisters may indeed be an indication of a reduced life.

Eventually the affected areas crust over and heal like the rash shown here. Blistering normally happens on asphalt roofs. If the shingles on a roof have trapped moisture they are likely to start blistering when the sun heats the roof. Blister on the left hail damage on the right.

Blistering only occurs in asphalt roof shingles as it is a byproduct of manufacturing or installation. The roofing company co takes a look at what causes asphalt shingles to blister and what can be done to prevent it.