Illinois weather doesn't play fair. One year brings heavy snow and ice, the next brings hail, high winds, and summer storms that leave roofs battered. Homeowners are paying closer attention to how their roofs are built, and asphalt shingle installation is at the center of that conversation.
Asphalt shingles remain the most popular roofing material in the state, thanks to their affordability, durability, and wide range of styles. But even the best shingles fail when they're installed poorly. Here's what Illinois homeowners should know before starting a roofing project.
Why Asphalt Shingles Still Dominate Illinois Roofs?
Asphalt shingles strike a balance few materials can match:
- Cost-effective: Lower upfront costs than metal, slate, or tile.
- Versatile: Available in dozens of colors and architectural styles to suit any home.
- Weather-tested: Modern shingles are engineered to handle temperature swings, rain, and snow.
- Repair-friendly: Damaged sections can often be replaced without redoing the whole roof.
For most Illinois homes, asphalt is the practical choice, as long as the installation is done right.
Trending Now: Impact-Resistant and Energy-Efficient Shingles
Two trends are shaping asphalt roofing right now.
1. Impact-resistant shingles. With hail and severe storms a regular concern across the Midwest, many homeowners are choosing shingles rated to withstand impact. Some insurers also offer discounts for them, so ask your provider.
2. Cool-roof and energy-efficient options. Reflective granules in newer shingles help reduce heat absorption, which can ease the load on your air conditioning during hot, humid Illinois summers.
Both upgrades only perform as designed when the shingles are installed correctly, which brings us to the process itself.
What Proper Asphalt Shingle Installation Looks Like?
A quality installation is more than nailing shingles to a roof. A professional crew should follow these steps:
- Inspect the roof deck. Rotted or damaged decking must be repaired or replaced before anything else.
- Install drip edge and underlayment. Underlayment adds a secondary moisture barrier, and drip edge directs water away from the fascia.
- Add ice and water shield. In Illinois this matters. Ice dams are common in winter, and a waterproof membrane along eaves and valleys helps prevent leaks.
- Lay shingles with correct alignment and nailing. Proper nail placement and count, following manufacturer specifications, is critical for wind resistance.
- Ensure proper ventilation. Balanced attic ventilation extends shingle life and helps prevent moisture buildup and ice dams.
- Flash and seal around penetrations. Chimneys, vents, and skylights are the most common leak points when flashing is done poorly.
- Clean up and final inspection. A good crew removes debris, checks for stray nails, and walks you through the finished work.
Common Installation Mistakes to Avoid
Cutting corners shows up later as leaks, blown-off shingles, and shortened roof life. Watch for:
- Shingles installed over damaged decking.
- Too few nails, or nails driven too high or too low.
- Skipped underlayment or ice barrier.
- Poor attic ventilation.
- Mismatched or improperly installed flashing.
Many manufacturers tie their warranties to correct installation, so a shortcut can cost you coverage as well.
How to Choose an Asphalt Roofing Contractor in Illinois?
The contractor you hire matters as much as the shingles you pick. When comparing an asphalt roofing contractor in Illinois, look for:
- Proper licensing and insurance. Ask for proof of liability and workers' compensation coverage, and check local licensing requirements.
- Local experience. Contractors who work in Illinois understand local building codes, weather patterns, and what holds up here.
- Manufacturer certifications. Certified installers can often offer stronger warranty options.
- Written, itemized estimates. Compare materials, labor, timelines, and warranty terms, not just the bottom line.
- Reviews and references. Look for consistent feedback on communication, cleanliness, and follow-through.
- A clear warranty. Ask about both material coverage and workmanship coverage.
Be cautious of door-to-door storm chasers who show up after severe weather, demand large upfront payments, or pressure you to sign immediately.
When Is the Best Time for Roof Installation in Illinois?
Spring and fall are generally ideal. Moderate temperatures help shingles seal properly, and weather windows are more predictable. Summer works too, though extreme heat can make shingles harder to handle. Winter installation is possible but trickier, since cold can prevent the adhesive strips from sealing until warmer weather arrives. If you notice leaks, missing shingles, or granules collecting in your gutters, don't wait for the perfect season. Early repairs prevent costlier damage.
The Bottom Line
A strong roof starts with the right materials and, even more, the right installation. With Illinois's unpredictable weather, investing in quality asphalt shingle installation by an experienced local professional protects your home, your energy bills, and your peace of mind for decades.
Planning a new roof or replacement? Start by requesting a free inspection and a detailed estimate from a trusted asphalt roofing contractor in Illinois, and ask plenty of questions. A good contractor will welcome them.