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What Causes Thermal Splitting in Asphalt Shingles?

What Causes Thermal Splitting in Asphalt Shingles?

Asphalt shingles are the ubiquitous residential roofing choice for the majority of homeowners across the country, and this popularity means that the problems and issues that plague roofing shingles in general and asphalt shingles in particular are well-documented. Thermal splitting is one such problem, and while it is somewhat uncommon, it’s still something all homeowners should be aware of and prepare for.

What Causes Thermal Splitting in Asphalt Shingles?

In this post, Mascon Inc. discusses what causes thermal splitting, and how it affects asphalt shingles.

Thermal Splitting and Cracking

The term thermal splitting or cracking is a bit of a misnomer as, in most cases, the result of thermal splitting is a tearing of the shingles. Regardless of what you call it, this tearing is caused by thermal expansion of the material. When temperatures soar, asphalt shingles expand; when the temperature inevitably goes back down again, the material contracts, which is what causes tearing.

Normally, asphalt shingles are immune to this effect, as advances in technology have made it so. If thermal expansion is having an negative effect on your roofing system, this is a good indicator that the asphalt shingles installed on your roof are defective or of low quality.

What It Looks Like 

Thermal splitting looks very different from shingle cracking. Thermally split shingles aren’t randomly strewn out across the roof surface. Rather, they’re usually located close to each other on a particular section of the roof. The tears can run vertically or horizontally, and usually have a straight or a slightly jagged line that cuts between a shingle panel.

Our GAF Shingles

Thermal splitting doesn’t look good when seen from the curb, and makes the roof more susceptible to weather damage. When it’s time to install a new roof on your home, we recommend choosing the best quality roofing materials to prevent this problem from occurring.

Mascon Inc. is a GAF Master Erlite® roofing contractor that offers premium quality 3-tab and architectural asphalt shingles. GAF’s roofs are made of long-lasting materials built to withstand the unique weather patterns of Austin, and thus will never experience thermal splitting.

Call us today at (512) 376-5096 to learn more about our services. We are a local roofing contractor in Austin, TX.