What Size Hail Damages a Roof? A Wisconsin Homeowner Guide

Why there is no single hail size that damages every roof

Damage happens when the energy of the stone beats the toughness of what it hits. Hail size is only one input.

• Hail size and shape. A smooth 1-inch stone and a jagged, spiked 1-inch stone do not hit the same. Spiked hail concentrates force in a smaller area and does more harm.
• Hail density. Some stones are layered, clear, hard ice. Others are soft, slushy and full of air pockets. A soft 1.25-inch stone can be gentler than a hard 1-inch stone.
• Wind speed and angle. This is the big one in south-central Wisconsin. Straight-line wind driving hail sideways at 50-70 mph turns a marginal storm into a total loss, and it concentrates hits on one or two slopes instead of spreading them evenly.
• Age and type of shingle. A 3-tab shingle at year 18 has lost its oils, gone brittle and already shed granules. It bruises and cracks at sizes a fresh architectural shingle shrugs off.
• What the hail lands on. Your roof is the toughest surface on the house. Aluminum gutters, furnace and plumbing vent caps, range hood covers, window wraps, AC condenser fins and garage doors dent at much smaller sizes.

The size reference points, used honestly

Treat these as "worth checking," not as a verdict.

• Pea to dime (1/4 to 3/4 inch): usually not enough to hurt a sound asphalt roof. Can still dent soft metals and can bruise old, brittle shingles, especially with wind.
• Quarter (about 1 inch): the common starting point for asphalt shingle damage. Most carriers take a 1-inch report seriously.
• Half dollar to golf ball (1.25 to 1.75 inches): damage is likely on most roofs, including newer ones. Expect soft-metal denting, split shingles and mat fractures.
• Golf ball and up (1.75 inches+): widespread damage is probable. Siding, windows, wraps and vents typically get hit too.

Hail also does not fall evenly. We have worked one side of a street in Rock County where every roof needed replacing while the other side barely got scratched.

What hail damage actually looks like, surface by surface

Most of it is invisible from your driveway. That is the single biggest reason legitimate hail claims get missed in this part of the state.

Asphalt shingles

Three things, and mostly found by touch, which is why this part is our job and not yours:

• Bruising. A soft, spongy dent, like a bruise on an apple. The fiberglass mat underneath is fractured even when the surface looks fine.
• Fractured mat. A crack or star pattern through the asphalt and mat. This is the actual failure. Once the mat is broken, water has a path.
• Random circular granule loss. Dark, roughly round spots where protective granules were knocked off. "Random" matters. Straight lines and worn edges are foot traffic or aging, not hail.

Hail bruising rarely leaks the week of the storm. It leaks two winters later, after freeze-thaw cycles and ice have worked into the fracture and started rotting decking. That delay is what makes waiting expensive. If you want the visual walkthrough, we put one together here: how to spot hail damage on your roof.

Metal roofs and metal accessories

Panels dent, and the finish can fracture at the dent, which is where rust starts. On standing seam, sight down the panel with low sun behind you. Soft metals (gutters, aprons, vent caps, drip edge) show dents early and clearly.

Siding, gutters and vents

Vinyl siding cracks and holes rather than dents, and cold vinyl in an early or late-season storm is far more brittle. Aluminum and steel siding dents. Gutter and downspout dents are some of the best evidence you have, and so are AC condenser fins, which work like a hail gauge nobody thinks to read.

Soft-metal dents are your evidence. Document them from the ground.

Adjusters in Wisconsin lean hard on soft metals. Ice dents aluminum before it dents asphalt, so fresh dents on gutters and vent caps support the claim that your roof took real hits, and they help establish direction, which supports a wind-driven hail story. If you are trying to sort out which storm did what, here is the difference between wind damage and hail damage on an insurance claim.

Do this the day after, standing on the lawn:

• Photograph dented gutters, downspouts, vent caps, window wraps and the AC condenser with a coin for scale.
• Photograph any hailstones you still have next to a tape measure.
• Write down the date and time of the storm. The date of loss anchors the entire claim.
• Save interior photos of any stains or drips.

Then let someone who does this for a living get on the ladder. Call (608) 909-9109 for a free, no-pressure inspection. We will tell you honestly whether you have a claim, and put it in writing either way.

Two clocks are running, and they are not the same clock

Notice of loss. Your policy requires you to report damage promptly. Do not sit on it while you think it over. Reporting is not the same as filing a full claim, and it protects you.

Time limit to bring an action. Separately, Wisconsin law (Wis. Stat. § 631.83) limits how long you have to actually sue on a property policy, and for fire-based homeowner policies that window can run as short as 12 months from the inception of the loss. That is not something a declarations page spells out clearly. Call your agent and ask both questions out loud: how long do I have to report, and how long do I have to bring an action. We are roofers, not attorneys, and on this one you want the answer from your carrier in writing.

There is also a practical proof window. After a couple of Wisconsin winters, hail granule loss and age-related granule loss start to look alike to an adjuster, and three more storms have rolled through since. Valid claims get denied on causation all the time simply because nobody documented the date.

While you are in the policy, check two numbers:

• ACV vs RCV. Actual cash value pays depreciated value. Replacement cost value pays the full cost to replace, usually in two checks, with the balance released after the work is completed and documented.
• Your wind and hail deductible. An increasing number of carriers writing in Wisconsin now attach a separate percentage-of-dwelling wind/hail deductible instead of a flat dollar amount. Check whether yours does. On a $400,000 dwelling, a 2% deductible is $8,000, which changes the math on a marginal claim completely.

Will filing a hail claim raise my premium?

This is the fear that stops most people from picking up the phone, so let us deal with it straight. A weather claim is generally treated differently than an at-fault liability claim, and hail is a regional event, meaning it affects a whole rating territory rather than just your address. Carriers do watch claim frequency, though, and a pattern of claims can affect renewal.

Here is the reasonable order of operations: get the roof inspected first, at no cost, then ask your agent how your specific carrier treats a single weather claim, then decide. Knowing you have $14,000 of hail damage and choosing not to file is a decision. Not knowing is just risk.

What if the adjuster denies the claim or only approves one slope?

You are not finished. This is normal and it has a path.

• Reinspection. You can request the adjuster come back out, ideally with your contractor present.
• Supplement. Missed items, code-required upgrades (ice-and-water shield, drip edge, ventilation) and hidden decking rot found at tear-off get submitted as a supplement after approval.
• Second opinion. You can ask for a different adjuster or an engineer's report, though be aware engineer reports cut both ways.
• Appraisal. Many policies include an appraisal clause for disputes over amount, not coverage.
• OCI complaint. Wisconsin's Office of the Commissioner of Insurance takes homeowner complaints about claim handling.

On single-slope approvals. If only the south and west slopes were hit, a carrier may pay for only those slopes. That creates a matching problem, because a 12-year-old shingle does not match a new one, even in the same color and product line. Some policies address matching, some do not. This is exactly why we meet your adjuster on the roof: to argue scope with photos and chalk marks while the decision is still being made, not after the check is cut.

Repair vs full replacement. Scattered damage on a newer roof can sometimes be repaired honestly, and we will say so. But spot-patching a roof with 40 bruises per test square is throwing good money away, because the mat is fractured across the whole slope and it will fail early anyway.

What this costs, and how long it takes

Most homeowners on an RCV claim pay their deductible plus any upgrades they choose. That is it. For scale, a typical single-family asphalt shingle roof replacement in south-central Wisconsin often lands somewhere in the $10,000-$20,000 range depending on square footage, pitch, number of tear-off layers, and complexity (valleys, dormers, chimneys). Steeper, bigger or multi-layer roofs run higher. That is a ballpark for planning, not a quote.

Timeline, honestly: inspection within days, adjuster meeting usually a week or two out depending on how slammed carriers are after a regional storm, then material ordering and scheduling. The tear-off and install on an average house is typically one to two days. If something is open and actively leaking, we tarp it first. That is what our 24-hour emergency response is for, and emergency mitigation is generally a covered part of the claim.

Two beliefs that cost Wisconsin homeowners real money

"My roof is new, so it can't be hail damaged." New shingles are more flexible, not armored. Hail at 1.5 inches and up fractures new mats regularly, and a brand new roof with hidden bruising will fail a decade early while you assume you are covered by warranty. Manufacturer warranties do not cover hail.

"My neighbor got denied, so I'll get denied." And its twin, "my neighbor got a new roof, so I automatically get one." Neither is true. Different roof age, different shingle grade, different slope orientation, different carrier, different adjuster, and hail swaths are narrow. Your roof gets judged on its own evidence.

Be careful who knocks on your door after a storm

After a big hail event around Madison, Janesville, Stoughton, Monroe or Verona, out-of-state crews arrive fast. Some are fine. Many are gone by spring.

Warning signs worth taking seriously:

• Pressure to sign on the spot, especially a contingency agreement that locks you in before anyone knows whether you have damage.
• Anyone offering to "cover," "waive" or "eat" your deductible. That means the contractor is misrepresenting the true cost of the job to your insurer, and that exposes you, not just them. Wisconsin's general fraud provisions (Wis. Stat. ch. 943) are not something you want attached to your name over a $2,000 deductible.
• No local address, no local phone, no local references.
• Claims of damage without ever getting on the roof.

Verifiable checks you can make on anyone, including us: ask for their Wisconsin DSPS dwelling contractor qualifier and contractor credentials, ask for manufacturer certification (we are GAF Master Elite certified, which you can confirm through GAF directly), and ask for local addresses of recent jobs you can drive by.

Reducing your risk next time: Class 4 impact-rated shingles

If you are replacing anyway, ask about Class 4 impact-rated shingles. Class 4 is the top rating under UL 2218, a test where a 2-inch steel ball is dropped on the shingle twice in the same spot. To earn Class 4, the mat cannot crack.

They are not hail-proof, and very large stones can still mark them. But they hold up dramatically better in the size range we actually see here. Ask your agent whether your carrier files an impact-resistant roof credit. Where one exists, credits commonly run a few percent of the dwelling premium, so treat it as a partial offset rather than a guaranteed payback.

If you want the full storm-hardened approach (sealed decking, enhanced nailing patterns, ring-shank fasteners), look at FORTIFIED roofing methods. Those details matter as much as the shingle, because in wind-driven hail, roofs usually fail at the fasteners and edges first.

The practical takeaway

If hail in your neighborhood was quarter size or larger, get the roof looked at. If it was smaller but your roof is 15+ years old, or the wind was howling, get it looked at anyway. And if you found dents in your gutters or vent caps, you already have enough reason to make the call.

Get a straight answer before the clock runs out

We have been working on roofs, siding and gutters in south-central Wisconsin since 1979, and we know the difference between hail bruising and a roof that is simply old. We will tell you which one you have.

Here is exactly what happens when you call. We set a time, we get on the roof so you do not have to, we chalk and photograph hits inside test squares, we check your soft metals, siding and windows, and we hand you documentation you can use with your carrier. If you have a claim, we meet your insurance adjuster on-site through our hail and storm damage restoration work so the scope gets documented properly instead of underwritten from a driveway. If you do not have a claim, we say so, and you owe nothing.

No cost to find out. Nothing to sign. Nobody sitting in your kitchen pressuring you.

Call (608) 909-9109 or request your free inspection here.