Thermal Splitting Roof Shingles

What is the cause of thermal splitting cracks in fiberglass based asphalt roof shingles.

Thermal splitting roof shingles.

Thermal splitting typically happens where shingles bridge the joints in the underlying layer of shingles. Just because shingles are thermal cracked dosen t give the insurance company a get out of jail free card. Shingle splitting due to temperature related expansion and contraction is called thermal splitting. A variety of factors lead to this problem including thermal cycling and the adhesive that holds each shingle in place.

Splitting over shingle joints. Thermal splitting is common in low quality asphalt shingles. Thermal splitting is due to the contraction and expansion the shingle experiences as a result of changing temperatures. Meanwhile they shrink in cold temperature and the joints between them become larger.

This damage would lower the defense of your home by allowing water to leak into your roof. On the other hand cracking is caused by more gradual wear and tear with thermal expansion creating smaller tears at a time so the cracks are more shallow. They can be crease by wind damage at the same time. There are no industry standards that specify the minimum bond strength of shingle adhesive strips.

Changes in temperature cause the material components of the shingles to warp then split apart. Regardless of what you call it this tearing is caused by thermal expansion of the material. This usually happens where the roof shingles connect to the joints in the underlying layer of shingles. Reason behind thermal splitting in asphalt shingles.

It is characterized by thin large cracks between asphalt shingles. These conditions create stresses between the two assemblies that if extreme enough can result in shingle splitting or buckling. It may also form a diagonal pattern up the roof following the stair up pattern of the offset joints made during installation. Shingles expand in warm temperatures which cause the joints between them to decrease in size.

It s possible that shingles made by some manufacturers do not meet the astm standards for tear resistance. Whether you have conventional 3 tab shingles or laminated asphalt shingles you may have to deal with thermal damage like this if your home is exposed to extreme temperature swings. Splitting thermal splitting occurs due to changes in temperature that cause shingles to expand and contract. Even where shingles meet the standards it s possible that the standards themselves were defective.

Splitting happens when thermal expansion causes the different layers of a shingle to literally pull themselves apart from each other because one of the layers is secured by a fastener.