This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

One of the most common problems that shows up on asphalt roofs is the occurrence of roof blisters. Fortunately, this problem is manageable if you understand how it shows up in the first place. Read on as our team of residential and commercial roofing experts explains the nature of roof blisters and what causes them.

What Causes Roof Blisters?

The Bumps in Your Shingles

Roof blisters can easily be identified by their appearance. In most cases, they look like small groups of raised bumps on a shingle’s surface. In extreme cases, the bumps are big and easily seen even from far away. Blisters usually appear in multiple shingles at once.

How a Blisters are Formed

Roof blisters are part of a two-step process that can take several months or even years to complete. First, the shingles are subjected to wear and tear caused by uneven temperature changes on its top and bottom layer, causing them to expand and contract at different rates and creating small seams. Roof repair experts say that high-quality shingles are more resistant to this kind of wear and tear.

Once the seams are there, moisture from rain, snowmelt or general humiditys find its way into these seams and stay there. When the climate gets warmer, the heat causes the moisture to evaporate and expand, literally pushing the top layer up and forming the familiar bumpy texture.

An Early Warning

Fortunately, roof blistering is not a serious roofing issue. What’s more important is that the factors that cause blistering in the first place can also pose a bigger threat to your home. Once you see blisters on your asphalt shingles, contact a residential roof replacement contractor to have your roof’s insulation checked and the damaged shingles replaced ASAP.

Know more about common roof problems from our team of experts. Sully-Jones Roofing is the leading roofing contractor in La Mesa, CA. Call us at (619) 312-4018 today!