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Roofing Care Basics: What Can Cause Roof Blisters?
Roofing Care Basics: What Can Cause Roof Blisters? | Universal Roofing & Exteriors

Roofing Care Basics: What Can Cause Roof Blisters?

Asphalt shingles are one of the most popular roofing options available. That being said, they are not without their downsides. Today, our roofing and drywall repair experts talk about a common asphalt roofing issue: roof blisters.

What Are Roof Blisters?

Roof blisters show up as unsightly bumps on the surface of the roof’s shingles. In some cases, blisters manifest as groups of small bumps, while in other cases they appear as large bumps. Large roof blisters will usually be missing the top part, exposing a hollow area that can trap water and speed up the deterioration of the shingle.


Excessive moisture is partially responsible for the formation of blisters. Water that gets trapped between small seams in the shingle’s top layer tends to expand after the temperature rises, pushing the surface up and forming the infamous bumps. Getting high-quality shingles from a reputable roofing and drywall contractor will help decrease the likelihood of blistering.

Poor Ventilation

The moisture alone isn’t enough to cause blisters to form. Gaps that the water can seep into are caused by something else: poor ventilation. With poor ventilation, different temperatures from the top and bottom of the shingle cause it to expand and contract unevenly, pulling the shingle layers apart.

Blisters as a Warning

Blisters can be treated as a warning that the shingles are too old or weak, making them vulnerable to more serious problems. This means it’s the perfect time to get new shingles for your roof.

Learn more about proper roof care from the roofing and drywall painting experts at Universal Roofing & Exteriors, the leading home improvement company in Fishers, Zionsville and other areas northside of Indianapolis, IN. Call us at (317) 257-0779 or fill out this contact form to request a free quote.

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    No matter what kind of Indianapolis roofing project you need done, we at Universal Roofing & Exteriors can help you to achieve it. Whether you want your roof to be repaired or to be replaced completely, we can do it for you. We can send a contractor to examine your existing roof and let you know what needs to be done. Once their assessment is complete, they can give you various options on how to proceed. Once the roofing project gets started, our assigned contractor will make sure that it gets completed as efficiently and quickly as possible.

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