Hail size and damage are directly correlated — but knowing exactly what size hail damages your roof, siding, gutters, and windows helps you respond appropriately after every storm. Minnesota ranks among the top states for hail frequency, and our severe thunderstorm season from April through September produces hail events ranging from pea-sized to softball-sized. At Weatherguard Construction, we've assessed hail damage from storms of every magnitude across Stillwater, Woodbury, Minneapolis, and the entire Twin Cities metro for over 25 years.

Hail Size Reference Chart

Understanding hail size by comparison to common objects helps you gauge potential damage:

| Size | Diameter | Common Comparison | |---|---|---| | Pea | 1/4 inch | Small green pea | | Marble | 1/2 inch | Standard marble | | Dime | 3/4 inch | U.S. dime coin | | Penny | 3/4 inch | U.S. penny coin | | Nickel | 7/8 inch | U.S. nickel coin | | Quarter | 1 inch | U.S. quarter coin | | Half Dollar | 1.25 inches | U.S. half dollar | | Golf Ball | 1.75 inches | Standard golf ball | | Tennis Ball | 2.5 inches | Standard tennis ball | | Baseball | 2.75 inches | Standard baseball | | Softball | 4+ inches | Standard softball |

Hail Size and Roof Damage

Pea to Marble Size (1/4 to 1/2 inch)

  • Roof damage: Generally minimal. May cause slight granule displacement on aged shingles but rarely warrants an insurance claim
  • Other damage: Unlikely to damage siding, gutters, or windows
  • Action needed: No immediate action; monitor for cumulative effects over multiple storms

Dime to Nickel Size (3/4 to 7/8 inch)

  • Roof damage: Can cause cosmetic damage to shingles including granule loss and minor bruising. Older or deteriorated shingles may sustain functional damage
  • Siding damage: May dent aluminum siding; vinyl may show minor impact marks
  • Gutter damage: Possible denting of standard aluminum gutters
  • Action needed: Inspect your roof from the ground. If shingles show visible damage, schedule an inspection

Quarter Size (1 inch) — The Threshold

One-inch diameter hail is the critical threshold where most exterior components begin sustaining significant damage:

  • Roof damage: Shingle bruising, granule loss exposing the fiberglass mat, potential cracking. This is typically the minimum size that produces insurance-claimable roof damage
  • Siding damage: Noticeable denting in aluminum; cracking possible in vinyl and fiber cement siding
  • Gutter damage: Clear denting pattern in aluminum gutters
  • Window damage: Possible screen damage; unlikely to crack glass
  • Action needed: Schedule a professional roof inspection immediately. File an insurance claim if damage is confirmed

Golf Ball Size (1.75 inches)

  • Roof damage: Significant shingle damage including cracking, splitting, and puncturing. Most roofs sustain damage warranting full replacement
  • Siding damage: Cracking and shattering of vinyl siding; denting and chipping of fiber cement; denting of aluminum
  • Gutter damage: Severe denting and potential deformation of aluminum gutters
  • Window damage: Screen destruction; possible glass cracking, especially in single-pane windows
  • Action needed: File insurance claim immediately. Contact Weatherguard Construction for emergency assessment

Tennis Ball to Baseball Size (2.5 to 2.75 inches)

  • Roof damage: Catastrophic — penetration through shingles and possibly decking. Emergency tarping required
  • Siding damage: Shattering of vinyl; significant damage to all siding types
  • Gutter damage: Crushing and destruction of gutters and downspouts
  • Window damage: Glass breakage likely; frame damage probable
  • Action needed: Emergency response required. Call Weatherguard Construction at (651) 439-4320 immediately

Softball Size (4+ inches)

  • All components: Catastrophic damage. Roof penetration, siding destruction, window breakage, structural damage possible
  • Action needed: Treat as emergency. Ensure family safety, evacuate if structural integrity is compromised

Factors Beyond Hail Size

Hail size alone doesn't determine damage severity. Other factors include:

  • Wind speed — Wind-driven hail impacts at higher velocity, causing more damage per stone
  • Hail density — Dense, solid hailstones cause more damage than spongy, layered stones
  • Angle of impact — Steep-angle impacts are more damaging than glancing blows
  • Roof pitch and orientation — Steeper pitches may deflect some impact; the storm-facing side sustains more damage
  • Material age and condition — Older, weathered materials sustain more damage from the same size hail
  • Duration of the storm — Sustained hail causes cumulative damage even at smaller sizes

What to Do After a Hailstorm

  1. Check weather reports for reported hail sizes in your area
  2. Inspect your property from the ground, looking for visible damage to all exterior components
  3. If hail was 1 inch or larger, schedule a free professional inspection with Weatherguard Construction
  4. Document any damage with photographs before weather or cleanup alters the evidence
  5. File an insurance claim if your contractor confirms actionable damage
  6. Don't delay — weather evidence (hailstones, ground marks) disappears quickly

We serve homeowners in St. Paul, Eagan, Bloomington, and across Minnesota — plus Schaumburg, IL and Centennial, CO.

Frequently Asked Questions

What is the minimum hail size that damages a roof?

Quarter-sized hail (1 inch diameter) is generally the threshold for significant roof damage on standard asphalt shingles. However, aged or deteriorated shingles can be damaged by smaller hail. If your roof is more than 15 years old, even nickel-sized hail may cause claimable damage.

Can small hail cause cumulative roof damage over time?

Yes, repeated exposure to smaller hail (marble to dime size) accelerates shingle degradation by stripping protective granules. Over multiple seasons, this cumulative granule loss reduces your roof's lifespan and weather resistance, even if no single event causes catastrophic damage.

Should I file an insurance claim for every hailstorm?

File a claim when a professional inspection confirms actionable damage — typically from hail 1 inch or larger. Filing claims for minor events with no real damage can affect your claims history. Weatherguard Construction provides free inspections to help you determine whether a claim is warranted.

How can I make my roof more hail-resistant?

Consider Class 4 impact-resistant shingles (rated to withstand 2-inch hail) during your next roof replacement. Many insurance companies offer premium discounts for impact-resistant roofing. Weatherguard Construction installs impact-resistant shingle options from Owens Corning and other leading manufacturers.