Top 3 Reasons Your Asphalt Shingles Blister On Your Roof

Worn out asphalt shingles on a roof

Protect The Roof Of Your Home

With Expert Roof Installation

Your home goes through a lot. From sweltering humidity and heat in the summer to frigid cold and snow in the winter, your home protects you from the worst of New England weather. But if there’s one piece of your home that takes the brunt of the adversity, it’s your roof.

Expert roof installation and maintenance are essential to keeping your family and home safe. As such, roofers are often called to survey and repair damage caused by the state’s extreme conditions. And one of the most common types of roof damage we see is blistering asphalt shingles.

The constant onslaught of harsh weather and exposure to the elements can impact the integrity of your asphalt roof. Luckily, this common phenomenon is both avoidable and fixable should it occur.

Let’s look at the most common reasons your asphalt shingles might blister and what you can do about it.

How to Spot Asphalt Roof Blisters On Your Home

Most asphalt shingle roofs will blister over time. It’s one of the many ways asphalt shingles break down and will eventually need replacing. That said, not all blisters are created equal. Some might be large and easily visible, while others might be small and only noticeable upon close inspection.

Here are a couple of things to look for when inspecting your roof for blisters:

Changes In Color Or Texture

Blistering asphalt will often change in appearance. The granules might become loose, and the asphalt itself might change color.

Visible Bumps

You might also see small, raised bumps on the surface of your shingles. These blisters have already popped, and the asphalt is beginning to separate from the backing.

Cracks Or Splits

If the blister is large, you might also see cracks or splits in the asphalt.

Small blisters are standard and not necessarily cause for alarm. But if you see multiple large blisters, cracks, or splits in your shingles, it’s time to call a roofing professional. These could be signs of more severe damage, and you’ll want to have a professional take a look as soon as possible.

The Main Cause Of Asphalt Roof

Blistering On Homes

If you’ve ever seen bumps and uneven spots on your roof, you’ve probably wondered how they got there. In the roofing industry, these are called blisters.

At their core, roof blisters are caused by one thing: moisture.

Moisture is the enemy of your home’s materials. You want to keep water out of your home at all costs. But when it comes to your roof’s exterior, it’s impossible to avoid altogether. After all, rain and snow are a part of life in this area.

However, rain, snow, and moisture should stay on the surface. A roof blister is a sign that moisture has penetrated the protective layer of your home. Over time, water builds up under the shingles and breaks down the asphalt.

Asphalt blisters are a slow process. To safeguard against damage to your roof, you should have routine visits and inspections by an expert roofer. Their expert insight and tools can spot potential risks before they turn into costly repairs.

Why Do So Many Asphalt Blisters Happen In The Summer?

When moisture finds its way under your shingles – or inside the asphalt material – problems occur. This moisture expands with rising summer temperatures and pushes the shingle’s surface out – creating a blister.

Asphalt blisters can also happen when shingles are installed over a damp substrate. If the deck is not dry, it will hold moisture and heat up – causing the asphalt to separate from the backing.

You might see tiny bumps on your roof’s surface when this happens. These are called fish eyes because they look like the scales on a fish. While not as severe as other types of blisters, they indicate that your roof is at risk for further damage.

3 Common Reasons Your Shingles Have Blisters

And How To Avoid Them

1. Improper Installation

One of the most common causes of blistering is improper installation. If your roof isn’t installed correctly, it’s more likely to develop blisters over time.

There are a few different ways this can happen:

Use Of Incompatible Materials

When installing a new roof, ensure all materials are compatible. Shingles, tar, and other roofing adhesives should all be consistent to avoid any issues down the road.

Lack Of Ventilation

For your roof to properly ventilate, there must be an opening under the shingles. This allows heat and moisture to escape rather than becoming trapped and causing problems.

Nailing Too Close To The Edge

When nailing shingles into place, leave a bit of space around the edges. If they’re too close to the edge, they can begin to curl and blister over time.

To avoid this, hire a reputable roofing company for your installation. They should be able to install your roof without any issues.

2. Poor Maintenance Schedule

Another common cause of blistering is poor maintenance. If you don’t regularly inspect and clean your roof, you will likely develop problems over time. Be sure to have a professional roofer inspect your roof at least once a year.

An expert roofer can spot potential issues and help you care for them before they become significant problems.

3. Poor Quality Materials

If you use poor-quality materials when installing or repairing your roof, it’s more likely to develop blisters. This is because low-quality materials are more susceptible to moisture and heat damage. Be sure to use high-quality materials whenever possible to avoid any issues down the road.

Our team at Jancewicz & Son only uses CertainTeed Asphalt shingles. CertainTeed is a leading manufacturer of roofing materials, and their products are known for their durability and quality.

The Dangers Of Roof Blisters If Left Untreated

Roof blisters might seem like a minor problem.

Aesthetically, if they are small enough, they might go unnoticed by the average homeowner. But if left untreated, they can turn into a serious issue.

One of the biggest dangers of roof blisters is that they can lead to leaks. If the blister pops or breaks open, it exposes the underlying materials to moisture and rain. This can cause severe damage to your roof and lead to leaks.

Another danger of roof blisters is that they can cause your shingles to lift. As the blister expands, it puts pressure on the surrounding shingles. This can cause them to lift up and eventually come off entirely. One damaged shingle can quickly turn into an entire section of your roof needing replacement.

If you notice any blisters on your roof, be sure to have a professional roofer take a look. They can determine the best course of action to avoid further damage.

Work With Professional Roofers That Know

What Your Home Needs

If you’re looking for a reputable roofing company in New England, look no further than Jancewicz & Son. We’ve been in business for over 35 years and have installed thousands of roofs for homeowners in the area.

Contact us today to get started on the right path for asphalt blister protection!

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