As a general industry convention, hail smaller than about half an inch (marble-sized) rarely damages an asphalt shingle roof, while hail from roughly one to one and a quarter inches (quarter to golf-ball range) is the size where functional damage becomes likely, and anything golf-ball-sized or larger should be assumed capable of real damage until an inspection says otherwise. Those are general bands, not a guarantee for your specific roof. Shingle age and how the hail hit (straight down versus wind-driven at an angle) can shift the outcome either direction at any given size.
Treat the table below as a starting point for how worried to be, not as a substitute for the ground and interior checks covered in what to do in the first 72 hours after hail.
Hail size and likely roof impact
| Hail size (approximate) | Common comparison | Typical effect on asphalt shingles |
|---|---|---|
| Under 0.5 inch | Pea to marble | Rarely damages shingles; can still dent very soft surfaces like AC fins or thin gutters. |
| 0.5 to 1 inch | Marble to nickel | Usually cosmetic at most on a healthy roof; can begin to matter on an aged or brittle roof. |
| 1 to 1.25 inches | Quarter | The range most often cited as the threshold where functional damage, bruising or cracking, becomes a real possibility. |
| 1.25 to 1.75 inches | Half-dollar to golf ball | Functional damage becomes more likely, and dented soft metal is typically obvious. |
| 2 inches and larger | Egg to baseball | High likelihood of real functional damage; the largest sizes can puncture or strip shingles outright. |
These bands reflect general convention repeated across roofing and insurance industry sources, not a fixed engineering standard or a legal threshold. Nothing here tells you what happened to your specific roof.
Why size alone does not settle it
A size chart answers "was this storm capable of doing damage," not "did it damage my roof." Two roofs hit by the exact same size hail on the exact same day can end up in very different places, because the shingle itself and the angle of impact matter as much as the hailstone.
This is also why "it was only pea-sized, so I'm fine" and "it was huge, so I definitely have a claim" are both incomplete conclusions. Size sets the odds. It does not replace an actual look at the roof, and it never replaces the functional-versus-cosmetic question, which is the distinction insurers actually pay on. See functional vs cosmetic hail damage for how that determination actually gets made.
The two variables that shift the threshold: shingle age and wind angle
Shingle age and condition. Asphalt shingles get more brittle as they age, particularly under sustained Texas heat. A roof that is fifteen or twenty years old can take real functional damage from hail that a five-year-old roof of the same shingle would shrug off at the same size, because older, more brittle material cracks more easily under the same impact. This is one reason the same storm can mean "repair" on one street and "replace" on the house next door with an older roof.
Wind-driven angle. Hail rarely falls perfectly straight down. Wind during a storm drives hail at an angle, which concentrates the impact on one slope of the roof (usually whatever side faces the wind) while leaving other slopes comparatively untouched. This is why damage is often uneven across a roof, and why an inspector checks multiple slopes rather than assuming one reading applies to the whole roof.
Small hail (marble to half-inch): usually not a shingle event
Hail in this range is common in Texas and most storms that produce it do not leave meaningful shingle damage on a roof in reasonable condition. It can still dent very soft materials, like thin aluminum gutters or an AC unit's fins, which is a useful, honest signal that hail of some real size fell, even if the shingles themselves are unaffected. If your ground check turns up dented soft metal after a small-hail event, it is still reasonable to take a look, particularly on an older roof.
Quarter to golf ball: the range that actually matters
This is the band where most functional hail damage claims in Texas actually originate. It is large enough to bruise or crack a healthy shingle and easily enough to damage a shingle that is already aged or brittle. If your storm produced hail in this range, a ground check for dented soft metal and a professional inspection are both reasonable next steps, regardless of what the shingles look like from the yard.
Golf ball and larger: assume real damage
At this size, the honest default is to assume the roof took real damage until an inspection tells you otherwise, not the reverse. Hail this large routinely dents gutters, vents, and AC units visibly, and functional shingle damage, sometimes severe, is common. The largest sizes can crack, puncture, or strip shingles outright, and can also damage the roof deck underneath in extreme cases. This size range is also where impact-resistant materials genuinely earn their premium; see our honest breakdown of Class 4 shingles for what that upgrade does and does not buy you in a storm this size.
What to do regardless of the size you saw
Size tells you how worried to be. It does not tell you what to do instead of the basics: check the interior of your house, check soft metal and shingles from the ground, photograph everything with a timestamp, and do not climb onto the roof yourself. The full order of operations is in what to do after hail damage hits your roof. If your ground check leaves you unsure what you are looking at, checking your roof for hail damage without climbing it covers what a ground-level read can and cannot actually tell you.
More on why this site sizes things honestly instead of steering you toward a sale is on the about page, and the full recommendation approach is in how we decide what gets recommended on this site.
FAQ
Does pea-sized hail ever damage a roof?
Rarely on a healthy asphalt roof, but it is not impossible, particularly on a roof that is already old or brittle. It is worth a quick ground check for dented soft metal even after a small-hail event, especially on an aging roof.
Is there an official size chart insurers use?
Not a single universal one. The size bands used across the industry are conventions, not a fixed legal or engineering standard, and different insurers and adjusters may weigh size somewhat differently alongside the actual condition of the roof.
My hail was smaller than golf ball but my roof is 18 years old. Should I still get it checked?
Yes. Age lowers the size needed to cause real functional damage, so an older roof deserves a look even from hail in the marginal one-inch range that might not concern a newer roof.
Does the direction the hail came from matter?
Yes. Wind-driven hail concentrates impact on the windward slope of the roof, which is why damage is often uneven, heavier on one side than another. An inspection should account for this rather than judging the whole roof from a single slope.