Hail Damage on a Roof: What It Looks Like, What Size Hail Causes It, and What to Do

Updated October 2026. Reviewed by Chandler Steffy, President/Owner of Superstorm Roofing & Siding.

Key takeaways

• Hail damage is random. Normal wear follows patterns (whole slopes aging evenly). Hail leaves scattered hits.
• The National Weather Service treats 1-inch hail (quarter size) as severe. That is also where shingle damage becomes common.
• Roof age, wind, slope direction and shingle type matter as much as hail size.
• Bruised shingles can look fine from the yard and leak a year or more later.
• Your insurance policy sets your claim deadline and deductible. Check it before you file.

In this guide:

• What does hail damage look like on a roof?
• Hail damage vs. normal roof wear
• What size hail damages a roof? (hail size chart)
• Damaging hail in central Iowa in 2026
• How to check your home for hail damage after a storm
• Can a hail-damaged roof be repaired, or does it need replacing?
• What happens if you ignore hail damage?
• Is hail damage covered by insurance?
• Should you upgrade to impact-resistant shingles?
• Hail damage FAQ

What does hail damage look like on a roof?

On asphalt shingles, the most common roof type in Iowa, hail damage shows up in a few ways:

• Black or dark spots. Each impact knocks granules off and exposes the darker asphalt underneath.
• Bruises. The shingle feels soft or spongy where it was hit, even when the surface looks only slightly marked.
• Granule loss in a scattered pattern. Fresh granules collect in gutters and at the bottom of downspouts after a storm.
• Cracks, splits and torn edges. Larger hail and wind-driven hail can split shingles or tear the corners.
• Exposed or fractured fiberglass mat. The shingle’s reinforcing mat shows through or is broken at the point of impact. This is hard to spot without a close look.
• Damaged seal strip. Impacts and wind can break the bond that holds each shingle down, which leads to blow-offs later.

See more real examples, and how we document damage for insurance, on our hail damage roof repair page.

Hail damage vs. normal roof wear

Granule loss, dark spots and cracking also happen as shingles age, which is why homeowners and adjusters sometimes disagree. These are the differences an inspector looks for:

What size hail damages a roof? (hail size chart)

The National Weather Service considers hail 1 inch (quarter size) or larger to be severe. That is also the size where we commonly start finding damage on asphalt shingles. Smaller hail can still do damage when it’s driven by strong wind or hits an older, brittle roof.

Size comparisons from the National Weather Service hail size chart. Damage depends on wind, roof age, slope and shingle type, so treat this as a guide, not a guarantee.

Can small hail damage a roof?

Yes. Hail under 1 inch usually won’t break a newer shingle by itself, but it can knock loose granules, dent gutters and vents, and damage an older roof whose shingles have become brittle. Wind matters a lot. Hail driven sideways by 50 to 60 mph wind hits harder and at an angle, so even small stones can do real damage on the side of the house facing the storm.

What else affects how much damage hail does?

• Roof age. Shingles lose flexibility over time. A 15-year-old roof can be damaged by hail that a 3-year-old roof shrugs off.
• Wind speed and direction. The slopes facing the storm usually take the most hits.
• Shingle type. Impact-resistant shingles rated Class 3 or Class 4 under the UL 2218 test hold up better. A Class 4 shingle has to survive a 2-inch steel ball dropped 20 feet.
• Roof pitch. Low-slope roofs take hail more directly than steep ones.

Damaging hail in central Iowa in 2026

Central Iowa sits in one of the most active hail areas in the country, and 2026 was a busy year. A few of the larger reports in the National Weather Service Storm Prediction Center’s preliminary storm reports:

• April 15: 2.5-inch hail west of Toledo and near Glidden, 2-inch hail in Chariton, and 1.75-inch hail south of Nevada.
• July 20: Baseball-size (2.75-inch) hail northeast of Story City, plus 2-inch hail near Ellsworth and 1.75-inch hail north of Kamrar.
• September 8: 2.25-inch hail in Ankeny and 1.75-inch hail northwest of Bondurant.
• October 8: 1.75-inch hail south of Cumming and east of Redfield, and 1.25-inch hail west of Norwalk (see our October 8 hail guide for Norwalk and Cumming).

If your home was near any of these, have the roof checked even if nothing looks wrong from the ground. Hail-bruised shingles often don’t leak until a season or two later, and many insurance policies limit how long you have to file.

How to check your home for hail damage after a storm

Start on the ground. Don’t climb onto a wet or damaged roof.

1. Measure the hail if you can, or compare it to a coin or ball and take a photo with something for scale.
2. Check gutters and downspouts for fresh dents and for piles of granules at the bottom of downspouts.
3. Look at metal around the house: AC unit fins, mailbox, light fixtures and the garage door often show dents first.
4. Check the siding and window screens on the side of the house that faced the storm.
5. Look at the deck and outdoor furniture for spatter marks where hail knocked off dirt or paint.
6. Look up at the roof vents and flashing from the yard. Dents in roof metal almost always mean the shingles took hits too.
7. Take dated photos of everything you find. They help if you file a claim.

If you find dents in more than one place, schedule a professional inspection. Our post-storm checklist for Iowa homeowners walks through the next steps.

Can a hail-damaged roof be repaired, or does it need replacing?

It depends on how many shingles were damaged and how old the roof is. A few hits on a newer roof can often be repaired by replacing individual shingles. When damage is spread across multiple slopes, or the shingles are older and brittle, repairs usually don’t hold up and a full replacement is the better value. Matching is also a factor: older shingle colors and styles may no longer be made, so patches can stand out.

See our roof repair and roof replacement services, or learn about storm damage repair.

What happens if you ignore hail damage?

Bruised and cracked shingles let water reach the roof deck. Over time that can mean leaks, wood rot, mold in the attic and wet insulation. In Iowa winters, damaged shingles also make ice dams more likely to cause leaks. Waiting can also hurt you on the insurance side if your policy’s filing deadline passes.

Is hail damage covered by insurance?

Most standard homeowners policies cover sudden hail damage to a roof, but the details vary by policy:

• Deductible. Many policies have a separate wind/hail deductible, sometimes a percentage of the home’s insured value.
• Replacement cost vs. actual cash value. Some policies pay the full cost to replace the roof. Others subtract depreciation, which matters on older roofs.
• Filing deadline. The Iowa Insurance Division notes that policies usually require claims to be filed within a specific time frame. Check yours and don’t wait.

The Iowa Insurance Division also recommends being present when the adjuster inspects, pointing out all the damage, and getting estimates from at least two registered contractors. Under Iowa law, a contractor can’t advertise or promise to cover your insurance deductible. Learn more about how we help with insurance claims. We provide documentation and evaluation for homeowners working with their insurer. We are not public adjusters.

Should you upgrade to impact-resistant shingles?

If you’re replacing a hail-damaged roof in Iowa, impact-resistant shingles are worth pricing out. Class 4 shingles hold up to much larger hail than standard shingles, and some insurers offer a premium discount for them. Ask your agent what yours offers. Read Class 3 vs. Class 4 shingles: the real value and the fine print.

Hail damage FAQ

What does hail damage look like on a roof?

On asphalt shingles, hail damage looks like random dark spots where granules were knocked off, soft bruises that feel spongy when pressed, and cracks or torn edges. Dented gutters, vents and flashing are the easiest signs to see from the ground.

What size hail can damage a roof?

Hail 1 inch (quarter size) or larger commonly damages asphalt shingles, and the National Weather Service treats 1-inch hail as severe. Smaller hail can still damage older or brittle roofs, especially when strong wind drives it into the roof at an angle.

Can small hail damage a roof?

Yes. Hail under 1 inch usually won’t break newer shingles by itself, but it can loosen granules, dent gutters and vents, and damage older roofs. Wind-driven small hail does more damage on the side of the house that faced the storm.

How can I tell hail damage from normal wear?

Hail damage is random and scattered, often with dents in nearby metal and soft bruises in the shingles. Normal wear is even across a whole slope, usually worst on the sunniest side, with no impact marks or fresh dents.

Does homeowners insurance cover hail damage to a roof?

Most standard homeowners policies cover sudden hail damage, but deductibles, replacement cost versus actual cash value, and filing deadlines vary by policy. Check your policy and have the roof inspected and documented before you file.

How long do I have to file a hail damage claim in Iowa?

The deadline is set by your insurance policy, so check it directly. The Iowa Insurance Division notes policies usually require claims within a specific time frame, so have your roof inspected soon after a storm.

Can a hail-damaged roof be repaired instead of replaced?

Sometimes. A few damaged shingles on a newer roof can often be repaired. Widespread damage across several slopes, or damage on an older roof, usually makes full replacement the better long-term value.

Is a roof inspection after a hailstorm free?

At Superstorm Roofing & Siding, yes. Our hail damage inspections are free and include drone photos and a written report you keep, whether you hire us or not.