Asphalt shingle roofing systems are prone to a few problems including cracking and even getting completely blown off. Most of these problems are easy to spot and resolve. One problem that doesn’t get quite the same amount of attention is blistering.

There are a number of reasons why asphalt shingles blister. Today, we'd like to explain what makes this particular roofing material prone to this issue and what you can do to prevent it.

Heat & Moisture

Roofing manufacturers take care to make sure that their asphalt shingles remain free of moisture during the production process. However, sometimes minuscule amounts of water become trapped between the granules. During periods of direct sunlight, these water molecules expand and cause the shingle to blister.

Sometimes, moisture comes from the home itself. Poorly ventilated attics and crawl spaces are ideal places for water retention. Over time, vapor pressure can force the moisture through the roofing membrane and into the shingles themselves, resulting in blistering.

The Problem With Blisters

Blistering is not particularly harmful. Most of the time, these spots can be safely ignored as they make no difference to the performance of your roof. It’s only when they pop that they turn problematic. Popped blisters can dislodge the asphalt granules on your shingles, prompting granule loss.

Resolving the Issue

Keeping interior moisture levels under control is your best defense against common roofing problems including blistering. Ventilate your attic adequately to further lessen water vapor build-up. Finally, have a professional conduct a seasonal roof inspection to identify and diagnose potential trouble spots early on.

Protect your asphalt shingle roof with Roofing & More, Inc. We are your trusted local provider of high-quality home exterior products and top-notch services. Give us a call today at (703) 828-1620 or fill out our online contact form to request a free quote. We serve homeowners in Fairfax, as well as all neighboring areas in Northern Virginia.