Shingle Blisters: What They Are and Why They Happen

Scheduled inspections are important in identifying issues that may compromise your asphalt shingle roof. Now that temperatures are on the rise this summer, watch out for patches of color missing on the rooftop. These could be a result of roof blisters.

Shingle Blisters: What They Are and Why They Happen

In today’s post, the roof replacement pros of Oberg Roofing & Remodeling Inc. discuss blisters and the reasons why they happen.

Why They Happen

Blisters are a product of the constant exposure of asphalt shingle roofs to the harsh elements. These are areas of these roofing systems in which granules have been removed due to the chemical reaction within the shingles. Trapped moisture, as well as poor ventilation and installation, are some of the reasons why they happen.

As moisture within the shingles heat up during warm weather, bubbles begin to form on the outer layer where the granules are. They then collapse once a drop in temperature occurs at night. Eventually, the continuous expansion and contraction will rub out the loosened granules, leading to the exposure of the shingles’ matting.

Is It a Red Flag?

Blisters on shingles may still retain their granules, which means they won’t cause a problem for the roof or for its longevity. While it is possible not to pursue roof replacement in this situation, failure to address this may lead to these blisters popping.

When this happens, the granules dislodge from the surface, leaving the asphalt shingle unprotected from the elements. More and more granules are shed and with the roof continuously subjected to natural weathering, the areas with popped blisters can lead to leaks and other forms of roof damage.

What You Need to Remember

Preventing roof blisters is possible through expert installation—if you are looking to replace your existing roof—and periodic maintenance. As soon as you find some noticeable marks on the surface of your asphalt shingles, reach out to Oberg Roofing & Remodeling for inspection. Our highly trained roofers come prepared and equipped to address this form of roof damage.

We also work on installing steel roofs and perform exterior and interior home improvement. Call us at (651) 300-0688 or (320) 204-2303. You may also fill out our contact form to request a free estimate. We serve Sauk Rapid, MN.

Share Blog Post


Leave a Reply

Your email address will not be published. Required fields are marked *

Request a Free Inspection