How to Identify Hail Damage on a Roof (Inspector's Field Guide)

If a storm just rolled through and you're standing in your yard wondering whether your roof took a hit, you're in the right place. This guide walks you through what real hail damage actually looks like, what gets mistaken for it, and how to document what you find so a claim holds up.

To identify hail damage on a roof, you're looking for three things on asphalt shingles: a bruise (a soft, dented spot where the reinforcing mat underneath has fractured — it feels soft, like a bruise on an apple), a puncture, or granule loss severe enough to expose the black asphalt underneath. Damage is random with no straight-line pattern, and the impact marks are usually dark and fresh-looking. Functional hail damage to standard shingles generally starts around 1-inch hail for three-tab shingles and 1¼-inch for laminated (architectural) shingles. Check your gutters, downspouts, and air-conditioner fins first — those soft-metal surfaces show hail impacts before the roof does, and you can inspect them safely from the ground.

One thing up front: do not climb onto your roof to check. The National Roofing Contractors Association is direct about this — inspect from the ground, and bring in a professional to walk the roof. Most of what you need to build a case is visible without a ladder. Here's the full process.

Quick reference: the 8-step hail check

1. Confirm a storm actually happened. Look up the date and your location in NOAA's Storm Events Database to confirm hail fell near you and at what size.
2. Start with collateral evidence on the ground. Walk the perimeter and check gutters, downspouts, A/C condenser fins, soft-metal flashing, siding, window screens, and fences for fresh dents and dings.
3. Look for spatter marks. Fresh, light-colored splotches on oxidized metal and painted surfaces tell you hail hit, how big it was, and which direction it came from.
4. Check the gutters and downspout outlets for granules. A pile of granules washed out at the bottom of a downspout is a clue — but granules alone aren't proof of hail.
5. Know your hail-size threshold. Three-tab shingles take functional damage around 1 inch; laminated shingles around 1¼ inches. Smaller hail usually leaves marks, not functional damage — with an important new caveat below.
6. Get a professional on the roof. A trained roofer or engineer does the tactile bruise check, identifies mat fractures and punctures, and runs test squares. This is where the actual roof-surface diagnosis happens.
7. Document with the test-square method. A 10-by-10-foot square on each slope, every shingle examined and the damage counted, extrapolated across the roof.
8. Photograph everything with a size reference. Collateral evidence, close-ups of bruises and fractures with a coin in frame, and wide shots of each slope. Tie it all to the storm date.

Before you look: what hail actually does to a roof

Hail damage is not "the roof looks beat up." It's a specific set of physical changes to the material, and knowing the difference between those changes and ordinary wear is the whole game. Adjusters deny claims every day because what the homeowner saw was weathering, blistering, or foot traffic — not hail. Knowing what you're actually looking for protects you from both failure modes: missing real damage, and chasing damage that isn't there.

The industry standard comes from Haag Engineering, whose hail-assessment protocol has been used across the inspection, engineering, and insurance worlds since the early 1960s. Haag defines hail-caused damage to an asphalt shingle as "a bruise (fracture of the reinforcing mat), puncture, or displacement of granules sufficient to expose underlying bitumen." That's the definition your adjuster's engineer is working from, so it's the one you should be working from too.

Three mechanisms, in plain terms:

• Bruising. A hailstone strikes hard enough to fracture the fiberglass or organic mat inside the shingle, even if the surface granules stay put. It registers as an indentation with a fractured mat underneath — Travelers describes the feel as "soft to the touch, like the bruise on an apple." You find these by touch, not sight — which is exactly why a rooftop inspection matters.
• Granule displacement. The impact knocks granules off the surface. When this happens with a bruise underneath, it's classic hail damage. Per Haag's definition, granule displacement is damage when it's "sufficient to expose underlying bitumen" — at that point the shingle can lose remaining service life.
• Puncture or fracture. The hailstone cracks through the mat or punches through the shingle entirely. Larger or harder hail, or older brittle shingles.

The pattern matters as much as the individual hits. Travelers' homeowner guidance describes genuine asphalt-shingle hail damage as "random damage with no discernable pattern," with "hail hits that are black in color," "loss of granules, which may expose the roof felt," asphalt or mat that appears shiny," and "hail hits that are soft to the touch, like the bruise on an apple." Random and scattered across the field of the roof — not lined up, not concentrated in walking paths, not following the grain. (More on why a directional pattern on the roof field is actually a misidentification red flag in the red-flags section below.)

What it looks like on other roofing materials

Most homes in hail country are asphalt shingle, but the diagnosis differs by material:

• Wood shingles and shakes. Hail splits or punctures expose fresh, unweathered wood — bright brown or orange, with sharp edges, often with small broken-away pieces along the opening. Travelers lists the signs as "a split in the shingle that is brown/orange in color," "a split that has sharp corners and edges," and "impact marks or dents along the splits." Normal weather cracks, by contrast, follow the wood grain and are grayed and aged.
• Tile and slate. Hail produces clean, circular chips or cracks with fresh, bright break edges that stand out against the aged surrounding surface. (Tile- and slate-specific assessment is less thoroughly documented in primary engineering sources than asphalt and wood — treat any tile diagnosis as a job for a specialist.)
• Metal roofing and metal components. Hail shows up as circular dents. On a metal roof these are often cosmetic — metal rarely loses its waterproofing from hail alone unless the stones are very large. The single most useful forensic rule here, from InterNACHI: "Hail does not scratch or crease metal." Genuine hail dents show force that "came from above." Scratches, creases, and dents concentrated in one spot point to handling or mechanical damage, not hail.

Hail-size thresholds: when damage actually starts

Not every hailstorm damages a roof. Haag's thresholds for functional damage to standard (non-impact-resistant) shingles:

• Three-tab shingles: 1 inch or greater.
• Laminated / architectural shingles: 1¼ inches or greater.

IIBEC, the professional body for building-envelope consultants, corroborates the laminated threshold directly: "non-impact-resistant laminated shingles can be damaged by hard hailstones measuring at least 1¼ inches in diameter." Note the word hard. Hailstone hardness and density — not just diameter — drive whether a stone damages or merely marks a roof. A soft, slushy stone ("sloshball" hail) of the same diameter may leave only a spatter mark.

Treat these numbers as the general standard, not hard cutoffs — because in practice an adjuster scopes a roof off what they actually see, and that cuts both ways. When there's heavy collateral damage across multiple elevations and slopes, three-tab and laminated roofs do get replaced on hail as small as 0.75 inch; with strong collateral evidence, questionable shingle blemishes tend to resolve in the homeowner's favor. Conversely, a weather report showing 1.5-inch hail — even at your exact address — doesn't guarantee a claim. A report can help an adjuster justify a borderline call, but it can't substitute for damage that isn't visibly there. When 1.5-inch hail genuinely strikes a property, though, it reliably leaves asphalt-shingle damage that warrants repair or replacement.

To translate hail size into something you can actually picture, NOAA's Storm Prediction Center publishes the standard object reference:

The National Weather Service treats 1-inch (quarter-size) hail as the threshold for a "severe" thunderstorm. That happens to line up with the three-tab damage threshold, which makes it a convenient anchor — but the severe-storm threshold is a meteorological definition, not a roofing-damage standard. A quarter-size storm can be severe and still leave a laminated roof untouched.

The new wrinkle: small hail may matter more than we thought

For decades the working rule was that hail smaller than 1 inch rarely causes functional damage. A 2025 peer-reviewed study in Frontiers in Materials (Meisenzahl, Giammanco, and Hedayati of IBHS) complicates that. Testing sub-severe ice stones of 0.7 inch and 1.0 inch, the researchers found that cumulative granule loss from a series of sub-severe impacts exceeded the total granule loss from a single 2-inch hailstone. Naturally weathered specimens showed a 47% average performance decline versus new product.

Most consequential for anyone thinking about future claims: shingles exposed to both natural weathering and sub-severe impacts were, in the authors' words, "approximately ten times more susceptible to future damage from subsequent severe hail events." The practical takeaway isn't that small hail will get a claim approved today — it generally won't on its own. It's that repeated small-hail seasons quietly degrade your roof and set it up for a bigger loss later. Worth knowing, worth documenting, not worth over-claiming.

What to look for: the diagnostic indicators

This is the core of the inspection. Each indicator below tells you something different. None of them alone proves hail; together they build a case. The first several you can check yourself from the ground. The last two require a professional on the roof.

Indicator 1: Collateral evidence on soft metal (ground-level)

What to do: Before you look at a single shingle, walk the perimeter of the house and inspect the soft-metal and painted surfaces — gutters, downspouts, the aluminum fins on your A/C condenser, metal flashing, siding, window screens and wraps, fences, and any painted metal. These are usually the first surfaces to show hail impact.

Why it matters: Soft metals dent more easily than your roof, so they register hail that the shingles may have shrugged off — and they tell you the storm's size, hardness, and direction. Haag inspects exactly these surfaces before going up: utility and junction boxes, fences, gutters, downspouts, decks, and air-conditioner condenser fins to establish hailfall "size, hardness, frequency, and directionality." Forensic field guidance notes that the direction of the dents on these surfaces points back toward where the hail came from, and window-well covers in particular can give a good read on hail diameter.

What to document: Photograph every dented surface with a coin or ruler in the frame for scale. Note which side of the house took the most hits — that tells you the storm's direction and helps a roofer predict which roof slopes are worst.

Common mistake: Assuming the A/C unit is fine because the roof "looks okay" from the ground. The condenser fins are one of the most sensitive hail indicators on the property. If they're freshly dented, the roof very likely took hail too.

Indicator 2: Spatter marks (ground-level)

What to do: Look for fresh, light-colored splotches on oxidized metal, painted surfaces, and any dirty or weathered surface around the house. These are spatter marks — spots where a hailstone cleaned away the oxidation, dust, and grime.

Why it matters: Spatter is one of the best directional and sizing clues you have, and you don't need a ladder for it. InterNACHI explains that softer hailstones act "more like 'sloshballs' than hailstones... they remove oxidation, dust, dirt, and microbial growth from whatever they hit." Two things spatter tells you: "The long axis of the spatter mark will align with the direction from which the hail came," and spatter width gives "a rough indication of the hailstone's size for hail smaller than 2 inches."

What to document: Photograph spatter while it's fresh, with scale. Spatter is temporary — over time it "will re-oxidize, become re-covered by particulates, and will blend in with the surrounding surface." If you wait weeks, this evidence fades.

Common mistake: Treating spatter as damage. It isn't. Spatter on oxidized metal or wood does not itself constitute damage — it's evidence that hail fell, not proof the roof is compromised. Don't build your claim on spatter alone.

Indicator 3: Granules in the gutters and at downspouts (ground-level)

What to do: Check inside the gutters and at the base of each downspout for accumulated granules — the sandy, colored grit that coats shingles.

Why it matters: A hailstorm can knock loose granules that wash down into the gutters, so a sudden pile after a storm is a clue. But this is the weakest standalone indicator on the list.

What to document: Photograph granule accumulation, especially if it's noticeably heavier after the storm than before.

Common mistake: Granule loss is also caused by normal weathering, aging, and water flow — and it's typically heaviest at downspout outlets and on weather-facing slopes regardless of hail. Granules in the gutter are consistent with hail but don't prove it. Without a corresponding bruise or fracture on the shingle, granule loss is just as likely to be ordinary wear. Use it as supporting evidence, never as the centerpiece.

Indicator 4: Fresh vs. old damage (ground-level and rooftop)

What to do: For any damage you find, assess whether it looks fresh or weathered. This matters because a claim ties to a specific storm, and an adjuster will ask whether the damage matches that storm's date.

Why it matters: Haag's comparative surface analysis distinguishes "recent and non-recent hail," letting inspectors judge whether damaging hail fell recently or long ago. Fresh and old damage look different:

• Fresh damage: exposed asphalt or mat appears shiny and black, unweathered; wood splits expose bright brown/orange wood with sharp edges; spatter marks are clean and high-contrast against dirty surroundings.
• Old damage: exposed asphalt has dulled and oxidized and re-collected dirt; wood splits have grayed; spatter has faded and blended in.

What to document: Note the appearance, but don't assert a precise age. Precise dating of hail from appearance alone is a contested forensic exercise. Instead, anchor the damage to a verifiable storm date using NOAA's Storm Events Database (see Indicator 6). "Fresh-looking damage plus a confirmed hailstorm on this date" is a far stronger position than guessing an age off the roof.

Common mistake: Claiming fresh damage from an old storm, or vice versa. If your damage looks weathered but you're filing on last week's storm, expect the adjuster to push back — and have your NOAA storm history ready.

Indicator 5: The tactile bruise check (rooftop — professional)

What to do: This is where a trained roofer or engineer earns their keep. On the roof, they press and feel each shingle for the soft spots that signal a fractured mat — the "soft like an apple" bruise that you cannot see, only feel.

Why it matters: Bruising is the defining signature of functional hail damage to asphalt, and it is frequently invisible from the surface. A shingle with all its granules intact can still be functionally damaged underneath. This tactile check is the single most important step in distinguishing real hail damage from cosmetic marks — and it's the step you can't safely do yourself.

What to document: The inspector marks and photographs each bruise, ideally with a circle or chalk and a size reference, showing the soft indentation.

Common mistake (for the homeowner): Trying to do this yourself. NRCA is unambiguous: "Homeowners and business owners should only perform a roof system inspection from ground level. The risk of falling is too great without the proper safety systems in place," and it advises homeowners to "immediately contact a local roofing professional... and never climb up on a roof to do it themselves." Beyond the fall risk, untrained foot traffic creates scuff marks that an adjuster can later cite as "homeowner-caused damage."

Indicator 6: Mat fractures, punctures, and the storm anchor (rooftop + records)

What to do: The professional identifies fractures through the mat and outright punctures — the more severe end of the damage spectrum — and confirms they read as fresh. In parallel, you pull the storm record: search NOAA's NCEI Storm Events Database by your state, area, and date range to confirm a hail event near you and its reported size.

Why it matters: Fractures and punctures are unambiguous functional damage. And tying them to a documented storm closes the loop an adjuster needs: physical damage plus a verifiable weather event on a specific date. The Storm Events Database covers January 1950 through February 2026 (as of this writing) and is searchable by location, date, and narrative text.

What to document: Close-ups of fractures and punctures with scale, plus a printout or screenshot of the NOAA storm record for your date and location.

Common mistake: Filing without anchoring to a storm date. "My roof has damage" is weaker than "my roof has fresh hail damage and NOAA confirms 1.5-inch hail at my location on this date."

Indicator 7: The test-square count (rooftop — professional, documentation backbone)

What to do: This is Haag's documentation method and the backbone of a defensible claim. On each directional slope of the roof (a minimum of one test area per direction — north, south, east, west), the inspector marks a 10-by-10-foot square — 100 square feet, one "roofing square."

Why it matters: It turns "there's some damage up there" into a measured, extrapolatable count an adjuster can work with. Within the square, the method is to "examine every shingle, shake, or tile within that square closely," hand-manipulating each to check for "creases, breaks, soft spots, and bruising," then "record and differentiate the types of marks or physical damage found within that test square." The damage is then extrapolated across the roof by "multiplying the number of damaged shingles per square by the roofing squares for each direction."

What to document: Photographs of each marked test square, the per-square damage counts, and the per-slope extrapolation. Place squares away from overhanging trees and high-foot-traffic areas, which contaminate the count.

A note on "impacts per square" thresholds: You'll see roofing and adjusting sources cite a benchmark of roughly 8 functional impacts per 100 square feet as the line for a functional-damage determination, attributed to IBHS. Treat this with caution. We could not confirm that specific figure on an IBHS primary source — it circulates in secondary roofing and adjuster content but is not an independently verified, published standard. Don't anchor your claim to a hard "8 hits" number as if it were settled industry doctrine. The defensible position is the documented test-square count itself plus the inspector's functional-damage findings, not a contested threshold.

Indicator 8: Functional vs. cosmetic — and why it doesn't decide your coverage

What to do: Understand the distinction the engineering world draws, and understand its limit. Haag, citing CASMA, separates:

• Aesthetic / cosmetic damage: "small regions of missing granules caused by hail" with minimal impact on roof life.
• Functional damage: "significant granule loss easily visible from the ground, large areas of asphalt becoming exposed," or shingle fractures visible through the back of the shingle.

Why it matters — and the critical caveat: Here's the part that trips up homeowners and even some contractors. The engineering definitions of "functional" and "cosmetic" do not necessarily map onto how your insurance policy uses those words. An engineer's job is to describe what the hail did and did not do. Whether that triggers coverage depends on your policy language — and many policies now carry explicit cosmetic-damage exclusions or endorsements. So do not assume "functional = covered, cosmetic = excluded" as a universal rule. Read your policy, or have someone read it with you, for a cosmetic-damage exclusion before you assume how the determination cuts.

A practical detail worth knowing: when a policy uses "cosmetic damage" language, it's usually written to apply to metal or aluminum items specifically, and the policy will say so. The operative test an adjuster is trained to apply — even though the policy doesn't spell it out — is whether the storm damage has compromised the roof's ability to shed water. A hail ding to a metal roof or metal component that can still do its job is cosmetic, and excluded under a cosmetic exclusion. But if hail dents a metal panel at the seam and opens a small gap where rain could get in behind the panels, that's no longer cosmetic — normal coverage applies.

What to document: The physical findings (what the hail did), described neutrally. Let the physical record speak; don't pre-argue the coverage question on the roof.

Common mistake: Arguing "this is functional damage so you have to pay." Coverage is a policy question, not purely an engineering one. Frame your claim around the documented physical damage, and address the policy language separately.

Decision framework: what to do with what you found

Use this to decide your next move based on what your ground inspection turned up.

If you found multiple fresh dents on gutters, downspouts, and A/C fins, plus a confirmed NOAA hailstorm of 1 inch or larger: This is the strong-signal case. Bring in a professional roofer or HAAG-certified inspector to walk the roof and run test squares before you file, so you go into the claim with documentation rather than a hunch. A rooftop inspection plus a storm anchor is the foundation of a clean claim.

If you found scattered collateral evidence but the hail was reported under 1 inch: Functional roof damage is less likely on standard shingles, but it's not zero — and the sub-severe research above means cumulative effects are real over multiple seasons. A professional inspection still makes sense, but set expectations: a single sub-1-inch storm rarely yields an approvable functional-damage claim on its own. Document what you have, keep the records, and watch the roof over time.

If you found granule loss in the gutters but no dents anywhere on the collateral surfaces: Be skeptical that it's hail. Granule loss without corresponding impact evidence is more consistent with weathering. Get an inspection if the roof is older or you're unsure, but don't assume hail.

If you found nothing on the ground but a contractor knocked on your door insisting your roof is "totaled": Slow down. Get an independent inspection from someone you found, not someone who found you. See the red flags section below.

Across all cases: Document before you call your insurer. Photos with scale, the NOAA storm record, and a professional inspection report put you in a far stronger position than a phone call describing damage you haven't documented.

Red flags: what's NOT hail damage, and who's trying to fool you

Two categories here: physical conditions that get mistaken for hail, and people who'll exploit the confusion.

Conditions that imitate hail damage

Blistering — the number-one false positive. Blisters are pockmarks in the shingle caused by trapped gases or moisture in the asphalt, often from heat and poor attic ventilation, and they typically show up early in a shingle's life. InterNACHI draws the line cleanly: in genuine hail damage "granules remain in the hailstrike," while blisters show "loss of asphalt, sometimes to the extent that you can see the mat... Blisters look like pockmarks and are characterized by a loss of asphalt." Their bottom line: "a blister does not resemble hail damage." The tell is the granules — present in a hailstrike, gone in a blister — and the absence of a mat bruise underneath a blister.

Normal aging and weathering. Travelers explicitly lists as not hail damage: normal brittleness from "exposure to inclement weather and sunlight," plus "blistering, cracking, granule loss, flaking and algae," and "manufacturing defects and mechanical imperfections." Uniform, gradual granule loss is aging, not hail.

Bird droppings. Envista notes that "missing granules along a ridge due to long-term exposure to bird droppings" is commonly mistaken for hail. The acidic droppings strip granules in a line along the ridge — a pattern, not the random scatter of hail.

Foot traffic and mechanical damage. Scuffs and scrapes concentrated along walking paths, around rooftop equipment, or anywhere someone handled the material. On metal, this shows as scratches and creases — and remember, "hail does not scratch or crease metal." Concentrated, directional, scraped-not-bruised damage points to handling, not hail.

A directional pattern on the field of the roof. This one's subtle. The collateral evidence around your house is directional (it tells you which way the storm moved). But hail damage on the field of the roof itself is random and scattered. If "damage" lines up in rows, follows the shingle courses, or concentrates in a path, that's a manufacturing, installation, or foot-traffic signature — not hail.

People who exploit the confusion

Storm chasers. After any significant hail event, out-of-town contractors descend on the neighborhood. NRCA's caution is worth quoting: be wary of "unprofessional contractors who may approach," and "if it sounds too good to be true, it probably is." A contractor who finds you, pressures you to sign immediately, offers to "waive your deductible," or insists your roof is totaled before any real inspection is a red flag stack. Price, NRCA notes, "is only one criterion — professionalism and quality workmanship also must be considered."

The sign-before-inspection move. Any contractor who wants your signature on a contract or an assignment of benefits before a genuine inspection is working an angle. The inspection comes first. You decide second.

The manufacturer angle. Shingle manufacturers publish their own positions on what counts as hail damage versus a warranty-excluded condition, and those positions can be narrower than an independent engineer's. If a manufacturer document gets cited against your claim, treat it as one party's position — a manufacturer claim, not neutral engineering — and weigh it against an independent inspection.

Frequently asked questions

What does hail damage look like on a roof? On asphalt shingles, it's random dark hits with no straight-line pattern: bruises (soft spots where the mat fractured underneath), punctures, and granule loss that exposes black asphalt. Fresh hits look shiny and black. On wood, it's splits showing bright, sharp-edged unweathered wood. On metal, circular dents — never scratches or creases.

Can I tell if I have hail damage without getting on the roof? You can build a strong preliminary case from the ground — dented gutters, downspouts, and A/C fins; spatter marks; granules at downspouts; and a confirmed NOAA storm. What you can't do from the ground is the tactile bruise check and test-square count that confirm functional roof-surface damage. That part needs a professional on the roof. Don't climb up yourself; NRCA advises ground-level inspection only.

How big does hail have to be to damage a roof? For standard shingles, functional damage generally begins around 1 inch for three-tab and 1¼ inches for laminated/architectural shingles — and the stone's hardness matters, not just its diameter. A soft stone may only leave a spatter mark. Recent IBHS-led research also found that repeated sub-1-inch hail causes cumulative granule loss and accelerated aging over time, even though a single small-hail event rarely produces an approvable claim on its own.

What's the difference between cosmetic and functional hail damage? Engineering definitions (via Haag/CASMA): cosmetic is small regions of missing granules with minimal effect on roof life; functional is significant granule loss with large exposed-asphalt areas or fractures through the mat. Critical caveat: these engineering definitions don't necessarily match how your policy uses the words. Many policies have cosmetic-damage exclusions. Coverage is a policy question, not purely an engineering one.

How do I tell hail damage from blistering? Granules. In a hailstrike the granules stay in the impact; in a blister the asphalt is lost and granules are gone, often exposing the mat. InterNACHI puts it plainly: "a blister does not resemble hail damage." Blisters also lack the soft mat bruise underneath that a hailstrike leaves.

Are granules in my gutter proof of hail damage? No. Granule accumulation is consistent with hail but is also a normal result of weathering and water flow, and it's typically heaviest at downspout outlets regardless of hail. Without a corresponding bruise or fracture on the shingle, granule loss alone is more likely ordinary wear. Treat it as supporting evidence, not proof.

How can I tell if hail damage is fresh or old? Fresh damage shows shiny black exposed asphalt, bright sharp-edged wood splits, and clean high-contrast spatter. Old damage has dulled and re-dirtied, wood splits have grayed, and spatter has faded into the surface. But don't assert a precise date from appearance — anchor the damage to a verified storm date in NOAA's Storm Events Database instead.

What is the test-square method? Haag's documentation standard: mark a 10-by-10-foot square (100 sq ft) on each directional slope, examine and hand-check every shingle in the square for creases, breaks, soft spots, and bruising, record the damage, then extrapolate across the roof by multiplying damaged shingles per square by the number of squares per slope. It converts a roof inspection into a measured, defensible count.

Is there a set number of hits per square that proves a claim? You'll see a "roughly 8 impacts per 100 square feet" figure cited and attributed to IBHS, but we could not verify that as a published IBHS standard — industry sources cite it, but it could not be independently confirmed. Don't treat it as settled doctrine. The strong documentation is the test-square count and the inspector's functional-damage findings, not a contested threshold number.

Do impact-resistant (Class 4) shingles get hail damage? Yes — they're more resistant, not hail-proof. IBHS rates impact-resistant shingles on an Excellent/Good/Marginal/Poor scale across dents, tears, and granule loss; in 2025, of 23 products tested, 18 rated Good, 5 Marginal, and none Excellent. They still dent and lose granules, and the sub-severe hail research found that impact-resistant shingles were not meaningfully spared from cumulative granule loss caused by repeated small hail.

Should I file a claim for every hailstorm? No. A storm that leaves only spatter marks, only granule loss without bruising, or only sub-1-inch hail rarely yields functional roof damage on standard shingles. Filing claims that get denied or that are below your deductible can work against you. Document, get a professional read, and file when you have fresh functional damage anchored to a confirmed storm.

Who should inspect my roof — a roofer or an engineer? For most residential hail claims, a qualified roofer or a HAAG-certified storm-damage inspector can do the rooftop assessment and test squares. A forensic engineer comes in for disputed claims, large losses, or when the cause of damage itself is contested. HAAG certification is a recognized credential signaling specialized hail-assessment training.

Methodology note

This guide is built on the primary engineering and research sources that the inspection and insurance industries actually use to assess hail damage. The technical core — the bruise/fracture/granule definition, the 1-inch and 1¼-inch thresholds, the functional-versus-cosmetic framework, the collateral-evidence approach, and the test-square documentation method — comes from Haag Engineering, whose hail-assessment protocol has been the industry reference since the early 1960s, with corroboration from IIBEC. Hail-size references come from NOAA's Storm Prediction Center and National Weather Service, and storm verification from the NOAA NCEI Storm Events Database. The sub-severe hail findings come from a 2025 peer-reviewed study in Frontiers in Materials by IBHS researchers, with IBHS lab research providing the impact-resistant-shingle context. Homeowner-facing "what to look for" specifics draw on Travelers' consumer guidance, InterNACHI inspection standards, Envista Forensics, and NRCA safety guidance, used to corroborate the primary engineering sources.

Two deliberate limits. First, this guide does not present the frequently-cited "8 functional impacts per 100 square feet" figure as an established standard, because it could not be confirmed on an IBHS primary source — it's flagged in the text as an unverified industry rule of thumb. Second, contractor marketing blogs, law-firm and public-adjuster marketing sites, and SEO aggregator content were excluded; they are the dominant source pollution in this niche and were not used to support any claim. This guidance is written from the policyholder's side and has been reviewed by Derek Tomasone, a Florida-licensed property insurance adjuster. Published May 2026; updated as engineering and research sources change.