What Size Hail Damages a Roof? The Threshold Guide

"How big was the hail?" is the first question every insurance adjuster asks. The size of the hailstones determines what kind of damage to expect, whether your roof likely sustained actionable harm, and whether a claim is worth filing.

Here's a size-by-size breakdown of what each hail category does to the most common roofing materials in the Fort Wayne market.

Pea-Sized Hail (1/4 inch diameter)

This is the smallest hail that's noticeable during a storm — it sounds like sand hitting the windows. Despite the noise, pea-sized hail causes no damage to any residential roofing material. Shingles, metal, tile, and flat roofing all handle this size without effect.

You won't file a claim, you don't need an inspection, and your roof is fine. This is Fort Wayne's most common hail size and most storms produce nothing larger.

Marble-Sized Hail (1/2 inch)

Marble-sized stones begin affecting the softest surfaces. Aluminum window screens may dent or tear. Car paint can chip if stones are wind-driven at high velocity. Delicate plants and flowers may sustain damage.

For roofing materials, marble-sized hail is still below the damage threshold for both shingles and metal. You may notice minor granule displacement on older, already-weathered shingles, but this is negligible and not claim-worthy.

Quarter to Nickel-Sized (3/4 to 1 inch)

This is the critical threshold for asphalt shingles. At 3/4 inch, hailstones begin causing granule displacement that's detectable during a professional inspection. At 1 inch, the impacts are forceful enough to bruise the shingle mat, creating damage that's invisible from the surface but compromises the shingle's structural integrity.

After a storm producing 1-inch hail in Fort Wayne, expect to see dented gutters and downspouts, nicked window frames and siding, and granule accumulation in gutters heavier than normal weathering produces.

For metal roofing, 1-inch hail generally produces no visible effect on 24-gauge or 26-gauge residential panels. Thinner 29-gauge corrugated panels may show minor denting.

This is the size where filing an insurance claim starts making sense for shingle roofs. Get a professional inspection.

Golf Ball-Sized (1.5 inches)

This is serious hail. Golf ball-sized stones hit with enough force to crack asphalt shingles, create severe granule displacement, and cause significant mat damage across the entire exposed roof surface. After golf ball hail, most shingle roofs in the impact zone need full replacement.

Metal roofs show cosmetic denting at this size — visible depressions in smooth standing seam panels. The dents are aesthetic, not functional. Stone-coated metal typically handles this size without visible effect.

Beyond the roof, golf ball hail damages vinyl siding (cracking or puncturing), dents car bodies and can crack windshields, damages outdoor AC units and other equipment, and breaks wood fence boards.

If Fort Wayne gets golf ball hail, file an insurance claim immediately and get a professional inspection.

Baseball-Sized (2.75 inches) and Larger

This is catastrophic hail. Shingle roofs sustain irreparable damage — punctured mats, missing sections, immediate water intrusion. Metal roofs show heavy denting and possible panel deformation. Even stone-coated products may show surface damage.

Baseball-sized hail is rare in Fort Wayne — perhaps once a decade — but when it hits, it overwhelms the local roofing industry with demand and attracts storm chasers from across the country.

After this severity, every building in the impact zone needs professional assessment. Don't wait for someone to knock on your door — proactively contact your insurance company and a trusted local contractor.

The Wind Factor

Hail size alone doesn't tell the full story. Wind speed during the storm amplifies damage significantly. A 1-inch hailstone falling vertically from a non-windy storm impacts your roof at roughly 50 mph (terminal velocity). The same stone driven by 60 mph wind impacts at a combined velocity that dramatically increases the damage potential.

Wind also concentrates damage on one side of the house — the side facing the wind direction during the storm. When an inspector finds heavy damage on the west-facing slope and minimal damage on the east-facing slope, wind-driven hail is the explanation.

What to Do at Each Threshold

Under 3/4 inch: No action needed. Your roof is fine.

3/4 to 1 inch: Get a professional inspection within a week. Document conditions with photos. If the inspector finds significant damage, file a claim.

Over 1 inch: File an insurance claim immediately. Get a professional inspection. Document everything — your property and surrounding properties showing damage.

Over 1.5 inches: File a claim, get an emergency assessment, and be cautious about contractors who show up at your door. Follow our storm chaser protection guide.

For the complete post-hail action plan, read our hail damage guide. Get a free assessment or call (260) 255-4551.