Understanding the Freeze-Thaw Effect on Roofs

A common winter cycle occurs when there is moisture in the air and temperatures go below freezing, then above it, then back to below freezing again. The drastic swing in temperatures from comfortable outdoor temps to those well below freezing is associated with what is called the “freeze-thaw cycle.” 

The process of freezing and thawing can be destructive to your property, particularly your roof. The good news is that you can prepare for temperature swings and minimize damage to your home. Read on to learn how to spot damage from the freeze-thaw cycle and protect your roof this winter. 

How the Freeze-Thaw Cycle Can Damage Roofs and Lead to Costly Repairs

When above-freezing temperatures occur followed by heavy snow, ice, and below-freezing temperatures, and the cycle repeats—it can wreak havoc on your home exterior—particularly your roof. 

Understanding the Freeze-Thaw Cycle

Water and moisture are always in the air, and unfortunately moisture makes its way into anything possible. As temperatures drop, the water starts to expand and puts pressure on whatever it made its way into. If that’s a basketball—no problem! There’s some “give” that will compensate for the freeze-thaw cycle. But when moisture makes its way into concrete or asphalt shingles—which aren’t designed with “give” in them—the freezing water can create cracks in the rigid object as it expands. Often, this cycle may occur many times per week, putting undue stress on your roof shingles and leading to lasting damage.

How to Spot Damage from the Freeze-Thaw Cycle 

What freeze-thaw cycle damage looks like: 

Ice Dams Form 

This is one of the first indications that your exterior is suffering harm from the freeze-thaw cycle. Ice dams occur when snow melts and runs down your roof, then refreezes near your eaves. After draining down your roof, the moisture can back up behind your shingles and create issues when it freezes.

Uneven Spaces Are Created Between Asphalt Shingles 

When asphalt shingles are installed, there is a uniformity about them. If the spaces between them suddenly look uneven, it’s likely due to the early negative effects of the freeze-thaw cycle.

Flashing Stops Sealing

Where two different surfaces meet on your roof, flashing covers the joint to prevent moisture intrusion. If ice dams form, they leave damaged flashing in their wake. This makes your home vulnerable to additional moisture problems because the areas where your roof meets various penetrations (roof vents, skylights, chimneys) are no longer sealed. 

Moisture Infiltrates Your Dwelling

Over time, the freeze-thaw cycle makes your home vulnerable to significant damage. It can cause water to collect in your attic and unhealthy mold to grow in your home. The effects of mold on your health can cause allergies and other health issues to escalate, and respiratory problems to heighten.

Your Roof Deteriorates Faster

A new roof is a significant investment, so prolonging the life of your current roof is a priority. The freeze-thaw cycle causes your roofing components to age faster, leaving you with costly repairs or early roof replacement.

Gutters May Become Compromised

The freeze-thaw cycle can cause gutters to become damaged and detached from your roof. When gutters are harmed, water may begin to pool around your house’s perimeter, and could damage your landscaping and flood your basement. 

Tips to Protect Your Roof in a Colder Climate

Remove Snow from Your Roof

Never climb on your roof to try to remove snow. And if you’re not in excellent physical condition, don’t remove snow from your roof yourself. Simply hire a professional to do it for you. 

If you are in good shape, purchase a roof rake and add a rubber extension to it for your protection. Work with another person, dress in layers, and take breaks throughout the process as you rake the snow off your roof down to one inch. The reason you leave an inch of snow on your roof is to ensure you don’t damage any roofing components. Taking the weight of heavy snow off your roof will lessen the possibility of damage. And removing the snow down to an inch will decrease the possibility of ice dams forming and causing greater harm. 

Ensure Adequate Ventilation

To maintain a healthy roof each winter, ensure your home can “breathe” properly. This means you’ll need soffit vents to bring fresh cool air into your attic, and a ridge vent to allow warm air to exit your attic each winter. 

Schedule Roof Inspections 

While it is important for you to inspect your roof from the safety of the ground every spring, fall, and after major storms, it’s also vital that you have it professionally inspected once or twice a year. The sooner roofing issues are spotted, the quicker (and less costly) they are repaired. 

Have an Ice and Water Shield Installed with Your Next Roof Replacement

An Ice and water shield gives you one more layer of protection from the elements. This waterproof membrane helps safeguard your roof from damaging ice dams, snow, and heavy rain. Its weather resistance will defend your home from harm and give you peace of mind that you’re well protected in the midst of the storms and freeze-thaw cycles that come your way. 

Shield Your Home with a Gorgeous New Roof Installed by Our Experienced Team

Don’t settle for a subpar roof that leaves your home vulnerable to costly leaks and damage. Get the gorgeous roof replacement you need installed by our experienced team. 

At Lutgen Companies, we are a GAF Master Elite Contractor. Only 2% of companies in America are awarded this status, so you can rest assured that your roof will be installed with precision. After your project is completed, we register all applicable warranties on behalf of the homeowner. This is not common in the industry, but we like to go the extra mile to ensure your lasting satisfaction with your exterior upgrades. Learn more about how our roofing services can add value to your home while safeguarding it from the elements.