Does Attic Insulation Affect Shingle Blistering

See attic condensation cause cure and roof ice dam leaks.

Does attic insulation affect shingle blistering.

Attic ventilation has less effect on shingle temperature than shingle color or orientation. Second air temperature and wind movement over and under the roof affect the temperature. The cooler a roof is the less radiant heat it emits. An overheated attic combined with moisture can cause a number of problems including damage to roof decking and roofing shingles which can become distorted and deteriorate prematurely.

See martin s comment below as well as the paper i wrote the article about attic ventilation does help mitigate ice dams in cold climates but doesn t help much in hot climates. Does spray foam attic insulation void your shingle warranty from your manufacturer. Acute temperatures in uninsulated ventilated attics impact comfort and energy efficiency in living spaces below. Spray foam insulation effect on a shingle roof.

The company has said that rash blistering will not affect the intended performance or life of the shingles and that the shingle warranty will not be affected. Heat that s absorbed in the attic can also radiate into the living space causing air conditioners fans refrigerators and other appliances to work harder. Atlas roofing does not classify blistering as a manufacturing defect. Roof slope pitch or angle has the least influence on roof deck temperatures.

Well the answer to that is yes and no depending on what shingle you have on your roof you may or may not have warranty on your shingles. If your home has an attic or overhead crawl space heat rising up from below can cause blisters and cracks in asphalt roofing shingles. This is not significant enough to cause any damage to shingles. A discrepancy between attic and roof temperatures caused by lack of insulation on the attic floor creates the conditions that yield blisters.

Attic ventilation reduces the average temperature of a roof deck shingle by only 0 5 degrees celsius 0 9 degrees fahrenheit. The roof absorbs radiant heat from the sun but air flow either wind or attic ventilation has a cooling effect on the roof and helps bring down the overall temperature.