Every spring, supercell storms roll across northern Illinois and drop hail on Will County roofs. Some of it bounces off harmlessly. Some of it quietly shortens your roof's life by years. This guide explains how hail damages a roof, what to do in the first 48 hours, how the insurance process actually works, and how to spot the out-of-town crews that follow every storm.
How Hail Actually Damages a Roof
Hail does not have to punch holes to ruin shingles. The damage is usually subtler than that:
- Granule displacement. Hail knocks the protective granules off asphalt shingles, exposing the asphalt layer to UV. Sunlight then cooks the shingle, and it ages years in a matter of months.
- Bruising. A hailstone compresses the shingle mat and leaves a soft spot you can feel with your thumb. The surface can look fine while the mat underneath is fractured.
- Fractured fiberglass mats. With larger hail, the mat cracks outright and the shingle loses structural integrity at that point.
- Soft metal damage. Gutters, downspouts, vents, and flashing dent easily. Adjusters use these dents as confirmation that hail hit the property, because shingle bruising alone can be hard to photograph.
The frustrating part is that most of this is invisible from the ground. A roof can look perfectly fine from the driveway and still carry hundreds of bruised shingles.
Will County Hail Patterns: When to Worry
Hail season in northern Illinois peaks from April through June, when warm moist air collides with cold fronts sweeping down from the plains. Quarter-size hail, about one inch in diameter, is the widely used threshold where asphalt shingles start taking functional damage. Smaller hail can still strip granules and accelerate aging. If your neighborhood just took a storm with reported hail, assume your roof took it too and schedule an inspection. Most reputable inspections in Will County are free.
What to Do in the First 48 Hours After a Hailstorm
- Stay off the roof. Hail-weakened shingles are slippery, and a compromised deck may not hold weight. Inspect from the ground with binoculars if you want a first look.
- Document everything. Photograph dented gutters, downspouts, window screens, and patio furniture. Note the storm's date and time. Save local news reports or National Weather Service alerts for your area.
- Protect the interior. If water is coming in, use buckets and move belongings out of the way. A tarp over the damaged area is a reasonable temporary step. Keep receipts for anything you buy. Insurers typically reimburse emergency mitigation.
- Call for a professional inspection. A Joliet roofing contractor experienced with storm work documents damage the way adjusters need to see it, with photos, measurements, and test squares.
- Do not sign anything at the door. Storm-chasing crews knock within hours of hail. You need an inspection and information first, not a contract.
Repair or Replace After Hail?
It depends on how widespread the damage is and how old the roof is. Localized damage on a younger roof can often be repaired, for example one slope that took the brunt of the storm or a section around a valley. But shingle matching is a real problem. Manufacturers discontinue colors and product lines constantly, and a patch of new shingles that does not match makes the whole roof look tired and can hurt resale.
When bruising covers much of a slope, insurers will often approve replacing the entire slope so the roof keeps a uniform appearance and warranty. When the roof is already past 18 to 20 years, hail damage is usually the nudge that makes full replacement the smarter money. If the numbers point that way, our Joliet roof replacement cost guide breaks down what a new roof runs.
Filing a Hail Damage Insurance Claim, Step by Step
- Read your policy before you call. Know your deductible. In Illinois, wind and hail deductibles are commonly a flat amount or 1 to 2 percent of your dwelling coverage. Know whether you carry replacement cost value (RCV) or actual cash value (ACV). RCV pays to replace the roof. ACV pays depreciated value, which can leave a large gap on an older roof.
- Notify your insurer promptly. Policies require prompt notice of loss. In practice, that means filing within days of the storm, not months.
- Get an inspection, then meet the adjuster with your contractor present. This is the single most important step. A contractor who documents damage for a living makes sure nothing gets missed or minimized in the adjuster scope.
- Review the scope line by line. It should include tear-off, underlayment, ice-and-water shield, flashing, and ventilation, not just shingles. If the scope is thin, your contractor can submit a supplement with documentation.
- Understand recoverable depreciation. With RCV coverage, the insurer first pays the actual cash value, then releases the depreciation once the work is complete and invoiced. Keep every invoice.
- Choose your own contractor. Your insurer cannot force you to use their preferred vendor in Illinois. Pick a licensed local company you would hire even without an insurance claim involved.
Illinois Licensing and the Storm-Chaser Problem
Every hailstorm in Will County is followed by a second wave: out-of-town roofing crews knocking on doors. Some do decent work. Many do not, and when the warranty issue appears a year later, their phone number is dead.
Illinois law is on your side here. Under the Illinois Roofing Industry Licensing Act, anyone performing roofing work in the state must hold an Illinois roofing license. Verify it on the state website before signing anything.
Red flags to watch for:
- Out-of-state license plates and no local office or address
- High-pressure tactics, such as claiming the insurance window closes today
- Demands for large upfront deposits. Small deposits are normal. Half or more upfront is not.
- Offering to cover or waive your deductible. In Illinois that is insurance fraud, and it can void your claim.
- No proof of general liability or workers compensation insurance
A legitimate local company has a verifiable address, local references, and no problem with you checking their license. Homeowners in Frankfort, Mokena, Lockport, and Shorewood see these crews after every major storm. The rule is simple: verify first, sign later.
Why Winter Makes Hail Damage Worse
Hail damage and Illinois winters are a bad combination. Freeze-thaw cycles work moisture into every bruised shingle, prying the damage wider with each cycle. Granule loss from summer hail leaves asphalt exposed to UV all fall, and then ice dams exploit the weakened areas all winter. Small hail damage in June becomes a ceiling stain in February. That is why adjusters and contractors say the same thing: do not sit on hail damage through a Will County winter.