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The Difference Between Shingle Cracking and Splitting


Josh Knese • September 28, 2022

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Cracks and splits are common forms of asphalt shingle damage. But while these two are used interchangeably in some cases, they are two different types of roofing issues. Cracking is a surface-level issue while splitting refers to the material getting fractured. 

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Why Do Asphalt Shingles Crack?

Asphalt shingles contain volatiles, which are chemical compounds that keep shingles flexible and waterproof. Over time, shingles can lose these volatiles, causing the material to dry, shrink and crack. Long-term exposure to heat can speed up this process, resulting in the random formation of cracks on the surface of the shingles. Cracks are typically a symptom of aging. But if the roof is fairly new and showing cracks, it often means that the asphalt shingles used were of substandard quality.

Why Do Asphalt Shingles Split?

Changing temperatures cause asphalt shingles to expand and contract. As this cycle continues, thermal stress can occur, leading to the splitting of shingles. Another possible cause of asphalt shingle splits involves the strength of adhesives used to secure the shingles down. If the adhesion of the shingles onto the felt paper and sheathing is insufficient, shingles become less resistant to wind shear. As soon as the shingles are exposed to strong winds, splits and tears may form.

How Do You Prevent Asphalt Shingle Damage?

It is important to have your asphalt shingle roof inspected and serviced on a regular basis to make sure it is in good condition. At the first sign of cracks or splits, call a certified roofer to perform repairs needed to protect your home from weather conditions.

Let our roofing specialists at Exterior Building Solutions handle all your roofing needs, from routine inspections to repairs and replacements. Give us a call at (314) 470-8783, or fill out our convenient online form to get in touch with us today.

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