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Roof Blistering on Flat Roofs in Arizona

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Why it occurs and what you can do to prevent it

Reasons for roof blistering may vary, but weather changes can often be found as the main culprit.

For Arizona structures with flat roofing systems and annual storms, knowing why roof blisters occur, how to fix them, and preventing them on flat roofs is an important part of regular roof maintenance.

Roof blistering

This occurs when air or water is trapped within a flat roof membrane or built-up roof. Air or water fill up the gaps between the membrane system layers, resulting in bubble-like protrusions. Unless the bubbles burst, blisters can grow larger inside the membrane. Similar to a small bubble, the blister is typically filled with air or water. As the temperature outdoors continues to rise, the pressure in these patches forces the air or moisture to expand.

Preventing roof blistering

It all starts with having a proper, quality flat roof installation and a skilled roofer handling your maintenance afterwards. As early as possible, roof blisters must be remedied so they will not have the chance to enlarge or multiply. The best thing to do is schedule a seasonal maintenance visit with a professional. The number one rule for preventing roof blisters on flat roofs is to use dry materials in dry settings, which may not be possible with monsoon season. Be sure to give your roofing contractor enough time to fix your blisters in a dry setting.

Fixing roof blisters

This is a professional job, requiring a licensed contractor. Make sure to avoid touching the blisters, placing weight on them, or repairing without proper resources or training.

It is an easier, less costly repair by taking steps for preventing roof blisters from worsening or becoming other roof problems when burst open. It’s crucial to fix a roof blister as soon as possible. If left untreated for too long, they can create serious damage.

Any roof repair should always be done by a professional and American Roofing and Waterproofing can be trusted to get every job done effectively and with the best quality. With temperatures high in this summer season, blistering on flat roofs can be common and we want to assure all roofing work is done properly.

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Roof leak, storm damage, or urgent repair?

Our emergency roofing team is available around the clock for fast response across Arizona, California, Colorado and Texas.

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Client Stories

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"We had a great experience with American Roofing on our new home. From the beginning, their team was professional, knowledgeable, and easy to work with. They took the time to explain everything, showed up when t…"

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Jacob H

Google Review • Jul 2026
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"Andrew came out to help with a roof inspection after a wind gust shifted some things on my roof - he took care of everything and went above and beyond to help. Thank you!"

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Tim K.

Google Review • Jul 2026
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"I am in a large complex and Ronnie and Ishmael are currently doing the work. I am not qualified to have an opinion on anything but the quality of the two men. We often will offer opinions based on very little…"

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Rick W.

Yelp Review • Jun 2026
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"American Roofing did an excellent job re-foaming our roof. Malu was very knowledgeable and available every step of job. I highly recommend Malu and American Roofing for your roof repair needs."

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Danny Evans

Google Review • Jun 2026
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"We had a great experience with this roofing company. They did an amazing job from start to finish and truly stand out as one of the best in the roofing industry. Their team was professional, friendly, and compl…"

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Chandan Nataraja

Google Review • Jun 2026
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"Malu was fabulous, checked my roof, moved a few tiles and told me my roof looked in really good shape. Thx for such honesty !!"

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Jerry Zuba

Google Review • May 2026
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"We had some pigeons make a nest in our eave and they had managed to make some of our roof tiles slide. Malu not only fixed our roof but he also got the birds and nest down and told us how to prevent it from hap…"

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Tabitha Pasqualone

Google Review • May 2026
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"I am a former contractor and a building inspector. I got several estimates for our roof and ultimately chose American Roofing. Brad was very professional and provided an accurate amount of product and quality…"

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Rich & Laurie Lemcke

Google Review • Feb 2026
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"Shannon, Donna, and the whole team are amazing to work with! They’re always professional, friendly, and make the process for me easy from start to finish as well. It’s always a pleasure doing business with them…"

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aj bernardo

Google Review • Nov 2025
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"Mike and issac, installed my new roof 4 years ago and as part of the warranty they recently came out because I had water leaking into my garage after the heavy rain storms last week. Issac went up on the roof t…"

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Uncle Blade

Google Review • Oct 2025
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"I own a clothing store in Phoenix and September 27 my store was hit with the severe storms that attacked Phoenix. I walked in and the entire roof had gaping holes and rain had completely poured in and destroyed…"

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Cynthia Scott

Google Review • Sep 2025
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"Excellent and timely service! Ive had my new roof from them for 3 years and the workmanship was at a very high level! Recently, I had a leak in my roof cause from the whirly bird on my roof top blew off in a st…"

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Kevin Williams

Google Review • Sep 2025
Common Questions

Everything You Need to Know

Expert answers to your biggest roofing questions.

Absolutely. We are insurance claim specialists. We work directly with your insurance adjuster to ensure all damage is documented and covered. From the initial inspection to the final payout, we handle the paperwork so you don't have to.

We provide full roofing services across the entire Phoenix metro area, greater state of Arizona, California, Colorado and Texas. Not sure if we service your location call us at (602) 314-4650.

Yes. We back our work with industry-leading warranties on both materials and workmanship. Coverage varies by roof system and project type, so we'll walk you through exactly what your roof qualifies for — in writing — before any work begins.

We specialize in all major commercial systems, including TPO, PVC, EPDM, Built-Up (BUR), Modified Bitumen, and Metal Roofing. We also offer roof coating systems that can extend the life of your existing roof at a fraction of the replacement cost.

For emergency repairs, we offer 24/7 response. For roof replacements, our timeline depends on material availability and current schedule, but we typically can schedule inspections within 24-48 hours and begin work shortly after permit approval.

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ARCA
AMA
BBB
AACM
NAA
Certified Partner
BOMA Phoenix