Cracks and splits in asphalt shingles tend to look the same, which is the reason why these terms are often used interchangeably. However, a crack appears on the asphalt layer of the shingle, while a split fractures the entire shingle. Either way, these forms of roofing damage are a result of different weather elements that constantly batter residential roofing systems. Read on to learn how you can tell the two apart:
Shingle splitting is caused by constant temperature fluctuations, also known as thermal cycling. As the outdoor climate shifts from hot to cold and vice versa, the roofing material experiences expansion and contraction. As it expands, the joints between them decrease in size. The opposite happens when it shrinks under cold weather.
The subsequent stress decreases the adhesive strips underneath the shingles, causing the roofing material to split. It can occur in a diagonal pattern following a stair-step method used to install the shingles. However, it is not uncommon for roofers to find splits on random roof sections during their inspections.
Shingle cracking, meanwhile, is caused by the gradual loss of volatiles in the asphalt mix of the roofing material. These are chemicals with a low boiling point and are responsible for the waterproofing capabilities and flexibility of the asphalt shingles. These, however, dissipate with long-term moisture exposure and aging, resulting in the eventual drying and cracking of the material.
Heat can also expedite the process, leading to random cracks in the shingles’ weathered surface. This is also known as craze-cracking. It can also happen in newly installed residential roofs, which is an indication that the shingles used were of low quality.
Regular maintenance allows you to spot imperfections on the roof surface before your asphalt shingles deteriorate further. For this, you need a reliable roofing company like Howard Roofing & Home Improvements that can address small issues before they grow worse. Trust our team of professional roofers to ensure your roof’s weather performance and durability.
Call (636) 296-1057 or fill out our contact form to request a free quote. We serve homeowners in and around St. Louis, MO.