Asphalt Shingle Cracking and Splitting: The Difference

Asphalt shingles are widely used in waterproofing walls and roofs. But when they get damaged, they may expose your roof sheathing to moisture, which may lead to more complications. As such, it is important to immediately address the damage with professional roof replacement services contractors to prevent further issues. 

Cracks and splits are the most typical problems that can be found on asphalt shingles. But how can you detect the differences between the two?

Cracking

To ensure that the shingles are flexible and waterproof, volatile organic chemicals (VOCs) are added to the asphalt mix. Since VOCs have a low boiling point, the shingle shrinks and cracks the asphalt because of constant exposure to heat. This may also lead to craze cracks or random cracks. 

Additionally, with organic or fiberglass shingles, craze-cracking is a sign of aging. If the roof is somewhat new, however, cracking might suggest the use of a weak mat or low-quality shingles. 

Splitting

As temperatures change, shingles tend to expand and contract. Shingles expand under warm weather, causing the joints to decrease in size. By comparison, they also shrivel up due to cold temperatures, and the joints between them become larger. Due to this, the shingles that connect the underlying joints shrink as well, which makes the bridging shingles even more stressed as all the bonded-shingle assemblies shrink. Thus, thermal splitting occurs. 

All the stress weakens the function of adhesive strips, causing the shingles to split, which increases leakage and lowers wind resistance. Splitting can appear diagonally or randomly throughout the roof. 

For tough and resistant roofs, local homeowners trust Renovation Team for the most successful outcomes for their new roofing system. Get in touch with us. Call us today at (636) 939-1061, or fill out our contact form to set an appointment. We offer services in St. Louis, Chesterfield and surrounding areas.