How Long Does an Asphalt Shingle Roof Really Last in Illinois Weather?

Living in Illinois means enduring a climate that throws almost everything at your home. From blistering, humid summers to the brutal freeze-thaw cycles of winter, your roof takes a beating year-round. If you are a homeowner in the suburbs of Chicago, you might be wondering if your asphalt shingle roof will actually last as long as the warranty claimed.

Generally, you can expect a standard 3-tab asphalt shingle roof to last around 15 to 20 years. Higher-quality architectural shingles typically last 25 to 30 years. However, local weather conditions and homeowner maintenance often dictate the actual timeline.

At Berg Home Improvements, we have served Illinois homeowners for over 50 years. We’re here to share how local weather can impact roofing materials and what you can do to protect your investment.

What Factors Impact an Asphalt Roof’s Lifespan?

Material quality and environment play significant roles in determining a roof’s lifespan. Asphalt shingles are durable, but they are not invincible.

• Material Quality: Architectural shingles are thicker and more resilient than traditional 3-tab shingles. While 3-tab options are often more affordable, they generally have a shorter lifespan of up to 20 years compared to the 30-year expectancy of architectural styles.
• Installation Quality: Great materials can still be ineffective if not correctly installed. The right installation process can help a roof reach its full expected lifespan.
• Thermal Shock: Illinois weather is famous for rapid temperature swings. When a roof heats up during the day and freezes at night, the shingles expand and contract, causing cracks and reducing the roof’s ability to shed water.
• UV Exposure: Even in winter, the sun degrades the asphalt oils that keep shingles flexible. Once they dry out, they become brittle and prone to breakage.

On top of these, the level of maintenance applied will also impact how long the roof lasts.

How Much Does Ice Damage Impact a Roof?

Winter in the Midwest brings a specific threat to roofs known as ice dams. This occurs when heat escapes from the home into the attic, warming the roof deck and melting the snow on top.

As the water runs down to the colder eaves, it refreezes. This creates a dam made of ice that prevents proper drainage. Backed-up water can then seep under the shingles, leading to roof leaks, soaked insulation and interior drywall damage. Repeated ice damming significantly shortens the life of the roof edges and gutters.

How Can Attic Ventilation Impact a Roof’s Longevity?

Many homeowners overlook their attics, but they are critical for roof health. Proper ventilation regulates the temperature of both the home’s interior and the roof.

• Summer Protection: Without airflow, attic temperatures can skyrocket. This extreme heat is like an oven that “cooks” the shingles from the bottom up, leading to blistering and premature aging.
• Winter Protection: Balanced ventilation keeps the roof deck cooler, which prevents the snow from melting unevenly and forming those destructive ice dams.
• Moisture Control: Daily activities like cooking and showering generate moisture. If this humid air gets trapped in the attic, it can rot the roof decking and curl the shingles.

An attic with the right ventilation for temperature and moisture control can help extend a roof’s life.

What Are Typical Signs of Aging for an Asphalt Shingle Roof?

You do not always need a ladder to spot trouble. Often, you can see signs of failure right from your driveway. If your roof is approaching that 20-year mark, look for these indicators:

• Granule Loss: If you see “bald spots” on your shingles or find excessive granules in your gutters, the protective coating is wearing off.
• Cracking: Thermal shock often leads to visible surface cracks.
• Dark Streaks: While often cosmetic algae, dark streaks can be a sign of shingles holding moisture against the roof surface.

Once you notice one or more of these signs, it’s likely time to consider a roof replacement.

Preserve Your Home With a High-Quality Roof

Your roof is a critical defense against the often-harsh Illinois weather. Whether you need a simple repair or a full replacement, you need a contractor you can trust to provide transparent quotes and no hidden costs.

If your roof is showing signs of wear and aging, now is the time to act. Contact Berg Home Improvements today for a free roofing estimate.