How Big Does Hail Need to Be to Damage a Roof?
Last updated October 26, 2026
The short answer
What Size Hail Causes Damage
Hail starts to threaten roofs at about 1 inch in diameter, roughly the size of a quarter. At that size, the impact can bruise asphalt shingles, cracking the mat beneath the surface even if the shingle looks fine from the ground. Larger hail, 1.5 inches or more, can punch holes or break the seal between shingles, allowing water to seep into the decking below.
The actual damage depends on several factors. A new, impact-resistant shingle may shrug off hail that would tear an older, brittle one. Wind can push hail sideways, making it hit at a steeper angle, which increases the force. Hail that falls straight down is less dangerous than hail driven by a strong gust.
- Quarter-sized hail (1 inch) can bruise asphalt shingles
- Golf ball sized hail (1.75 inches) often cracks or dents shingles
- Baseball sized hail (2.75 inches) can punch through roofing materials
- Hail smaller than a pea usually causes little to no damage
- Age and condition of the roof matter as much as hail size
How to Spot Hail Damage
After a hailstorm, check your roof from the ground first. Look for missing shingles, dented gutters, or granules collecting in the downspouts or on the ground. On asphalt shingles, hail damage often appears as dark, round bruises that feel soft or spongy when you press on them. On metal roofs, look for small dents or scratches where the hail struck.
For a closer look, you might need to get on a ladder, but that is risky. If you are not comfortable, take photos from different angles and call a professional for an inspection. The pros have the training to spot subtle damage that you might miss. They can also check the flashing, vents, and skylights, which are common weak points.
Why Hail Damage Matters
Hail damage is not just cosmetic. When shingles are bruised or cracked, they lose their ability to shed water. Over time, moisture can seep into the roof deck, causing rot, mold, and eventually leaks inside your home. Even small hail damage can shorten the life of your roof by several years, so it is worth addressing early.
The longer you wait, the worse the problem becomes. A small bruise can expand with temperature changes and rain, turning into a full leak. If you notice water stains on your ceiling or walls after a hailstorm, that is a clear sign that water has already penetrated the roof. Acting quickly can save you from more extensive repairs.
What to Do After a Storm
Start by documenting the date, time, and size of the hail you experienced. Take photos of any visible damage to your roof, gutters, or yard debris. This information will be useful if you file a claim with your insurance company. Policies vary, and your insurer decides what is covered.
Next, consider a professional inspection. The pros can assess the condition of your roof and identify any hidden damage. If they find hail damage, they can recommend repairs or a full replacement depending on the extent. If you live in Oakland, a local inspection can help you understand the specific risks to your home, though you should always check your own roof first.
Roof Damage and Water Cleanup
If hail has already caused a leak, you have a water damage problem on your hands. Water can soak into insulation, drywall, and wood framing within hours, leading to mold growth and structural issues. The longer the water sits, the more extensive the damage and the higher the cost to fix it.
A water damage inspection can help you understand the full scope of the problem. The pros will check for hidden moisture in walls and ceilings using moisture meters and thermal imaging. They can also help with roof leak water damage cleanup, which involves drying, sanitizing, and repairing affected areas. If you have a leak, do not wait to address it.
- Call a plumber if the leak is near a pipe, not the roof
- Turn off electricity in affected areas if water is near outlets
- Move furniture and valuables away from the leak
- Place buckets under drips to catch water and reduce damage
- Take photos of the water damage for your records
Need help right now?
Phones are answered 24/7 for Oakland and nearby communities.
Call Now (510) 318-3798Frequently asked questions
Can pea-sized hail damage a roof?
Pea-sized hail, about 0.25 inches, rarely causes significant damage to a well-maintained roof. It might knock off a few granules from asphalt shingles, but that is usually cosmetic. However, if your roof is old or already damaged, even small hail can worsen existing weak spots.
How can I tell if my roof is damaged without climbing up?
Look for signs from the ground: missing or displaced shingles, dented gutters, or piles of granules in your yard. Check your attic for daylight coming through the roof or water stains. If you see any of these, call a professional for a closer inspection.
Does homeowners insurance cover hail damage to a roof?
Most standard homeowners policies cover hail damage, but deductibles and coverage limits vary. You will need to file a claim and have an adjuster assess the damage. Policies vary, and your insurer decides what is covered. Check your policy documents or contact your insurance company for specifics.