The main types of roof damage fall into nine categories: hail, wind, water and leaks, snow and ice, tree and impact, moss and algae, structural aging, animal and pest activity, and flashing failure. Every type belongs to one of two buckets that decide your repair path and your insurance odds: sudden storm damage or gradual wear. Repair bills run from $150 to $700 for missing or damaged shingles up to $900 to $6,000 for a tree impact, per Fixr’s roof repair cost guide (updated January 21, 2026).
By The Roofing Brief Team. Last reviewed: October 2026.
What are the main types of roof damage?
The main types of roof damage are hail, wind, water intrusion, snow and ice, tree and impact, biological growth, structural aging, pest activity, and flashing failure. Insurers group them differently: the Insurance Information Institute says homeowners policies typically cover roof damage from a covered peril “such as wind, hail, or falling trees,” while wear, rot, and neglect are typically excluded. The table below maps each type to its telltale look, Fixr’s 2026 repair range, and its usual coverage status.
| Damage type | Main cause | What it looks like | Typical repair cost (Fixr, Jan 2026) | Usually insured? |
|---|---|---|---|---|
| Hail | Impact from hailstones | Round bruises, cracked mats, granule loss, metal dents | $700 to $4,000 | Yes, sudden event |
| Wind | Uplift from high wind | Creased, lifted, or missing shingles | $250 to $6,500 (wind or hurricane); $150 to $700 for missing or damaged shingles | Yes, sudden event |
| Water and leaks | Failed seal, flashing, or aging | Ceiling stains, damp decking, drips | $350 to $1,500 | Depends on source |
| Snow and ice | Ice dams, load, freeze-thaw | Edge icicles, interior leaks, sagging | $400 to $1,500 ice dam removal, more inside | Sometimes |
| Tree and impact | Falling limbs or debris | Punctures, crushed decking, broken tiles | $900 to $6,000 | Yes, sudden event |
| Moss and algae | Shade, moisture, organic growth | Black streaks, green mats lifting shingles | Not in Fixr’s table; quote-based cleaning | No, maintenance |
| Structural aging | UV, age, moisture over time | Curling, bald spots, decking rot, sagging | $800 to $5,000 sagging roof; $150 to $1,000 decking by roof part | No, wear and tear |
| Animal and pest | Rodents, raccoons, birds, insects | Chewed edges, nests, torn vents | Not in Fixr’s table; $500 to $6,000 if soffit and fascia need rebuilding | Rarely |
| Flashing failure | Corrosion, lifted metal, bad install | Rust, gaps at walls, chimneys, valleys | $200 to $600 | Depends on cause |
The split that matters most sits in the last column. A carrier pays for a peril that struck on a date, not for a roof that wore out, and the Insurance Information Institute notes that most insurers require a roof over 20 years old to pass an inspection before writing a policy. That distinction runs through every type below, and it is why our 2026 Severe Weather Roof Damage Report tracks hail and wind claims state by state.
Hail damage
Hail damage shows up as round, dark bruises where granules are knocked loose, cracked or fractured shingle mats, and dents on metal panels, vents, and gutters. The National Weather Service treats hail of 1 inch (quarter size) or larger as severe, per its hail threat definitions, a useful size threshold for checking a roof after a storm. The bruise feels soft, like a fresh apple, because the mat underneath has fractured.
Granule loss is the lasting harm: bare asphalt bakes under UV and ages fast. Metal roofs rarely leak from hail, but functional denting and coating fractures can still support a claim, and Fixr puts hail repairs at $700 to $4,000. See hail damage to roof shingles for a close look at what adjusters mark and miss.
Wind damage
Wind damage appears as creased, lifted, torn, or completely missing shingles, usually starting at edges, ridges, and rakes where uplift is strongest. The National Weather Service’s base severe thunderstorm warning threshold is 58 mph winds, per NWS Chicago. Shingle wind ratings under ASTM D7158 were originally tied to basic wind speeds of 90 mph (Class D), 120 mph (Class G), and 150 mph (Class H); under ASCE 7-10 ultimate design wind speeds the same classes now read 115, 150, and 190 mph, per Professional Roofing (Mark S. Graham, September 2018). An aged or never-sealed strip can fail well below its label.
A creased shingle that flapped and set back down still counts as damage: the seal is broken and it will leak or blow off in the next storm. Look for a horizontal crease line and exposed nail heads on the course below; Fixr prices missing or damaged shingle repairs at $150 to $700. Our guide to wind damage to roof shingles covers how to separate a fresh tear from old mechanical wear.
Water damage and leaks
Water damage is the downstream result of most other roof problems, not usually a first cause on its own. It reads as brown ceiling stains, a musty attic, damp or spongy decking, and active drips during rain, and Fixr puts a traced roof leak repair at $350 to $1,500. The entry point is often far from the interior stain because water travels along rafters and sheathing before it drops.
Chronic moisture rots the deck, corrodes fasteners, and grows mold inside the assembly. Because the root cause can be a sudden event (a wind-torn shingle) or slow wear (a cracked pipe boot), water damage lands in either insurance bucket depending on what the adjuster traces it back to; the Insurance Information Institute ties coverage to the cause of loss, not the stain.
Snow and ice damage
Snow and ice damage comes from three mechanisms: dead load from deep accumulation, freeze-thaw cracking of materials, and ice dams at the eaves. An ice dam forms when heat escaping the attic melts snow up-slope, and the runoff refreezes over the cold overhang, backing water up under the shingles. Fixr prices ice dam removal at $400 to $1,500.
- Ice dams: Water pushes under shingles and leaks into soffits and ceilings.
- Load: One foot of fresh snow weighs 3 pounds per square foot when light and dry and up to 21 pounds per square foot when wet and heavy, and 1 foot of ice weighs about 57 pounds per square foot, per FEMA P-957 (January 2013).
- Freeze-thaw: Water in small cracks expands as it freezes and widens them.
The IRC (section R905.1.2, per the 2021 code text) requires an ice barrier where there is a history of ice forming along the eaves: either two layers of underlayment cemented together or a self-adhering polymer-modified bitumen sheet, from the eave to at least 24 inches inside the exterior wall line, and at least 36 inches along the slope on roofs of 8:12 or steeper. Roofs missing that membrane leak first.
Tree, debris, and impact damage
Tree and impact damage ranges from cosmetic abrasion to a limb through the deck, and Fixr’s range for a tree impact runs $900 to $6,000. A branch resting on shingles scours granules every time it moves in the wind, while a falling limb can puncture the sheathing, crush trusses, and break tiles. Even small debris that dams a valley or clogs a gutter forces water sideways under the field.
A fallen tree is a sudden accidental event, and the Insurance Information Institute lists falling trees among the typical covered perils, though removing the tree itself may have separate limits. For more, see our guide to tree damage to a roof and the tree removal limits. Document the position before anything is moved. Impact damage is one type where a full structural check for rotted or broken roof decking is worth the cost before shingles go back on.
Moss, algae, and biological growth
Biological damage is a maintenance problem, not a peril. Black streaks are algae; the Asphalt Roofing Manufacturers Association (ARMA) names Gloeocapsa magma as “probably the most prevalent” species and treats the streaks as discoloration. Moss is the structural threat: thick green mats hold water against the surface, lift shingle edges, and let moisture wick under the course, which speeds rot in shaded, humid, north-facing slopes.
Insurers treat moss and algae as owner neglect, so cleaning and any resulting rot come out of pocket. ARMA says “DO NOT use a power washer or any type of brush or broom” on algae and recommends a cleaning solution left to dwell 15 to 20 minutes before a gentle rinse, mixed per the shingle maker’s directions. For the streak version specifically, see how to clean and prevent algae streaks on a roof.
Structural aging and material wear
Structural aging is the slow failure every roof reaches: shingles curl, cup, and lose granules, sealants dry out, and the deck softens. This is the type insurers exclude as wear and tear, because it is expected, not accidental, and CAPE Analytics reports that roofs it rates Poor or Severe see a 75 percent higher wind and hail claim frequency than roofs rated Good or Excellent. Bald patches, widespread curling, and exposed fiberglass mat mean the roof is near the end of its service life.
The parts that rot from below matter as much as the shingles: fascia, soffit, and plywood decking decay under chronic moisture and undermine everything above them. Fixr prices a sagging roof repair at $800 to $5,000 and soffit and fascia work at $500 to $6,000. A sagging ridge or a deck that flexes underfoot is a structural signal, not a surface one, and it usually points to full replacement rather than a patch.
Animal and pest damage
Animal damage comes from raccoons that tear back shingles and nest in insulation, squirrels and rats that gnaw fascia and wiring, birds that block ridge and box vents, and wood-boring insects in the deck. The entry hole is often small, but the interior nesting and the leak it opens are not, and soffit and fascia rebuilding alone runs $500 to $6,000 in Fixr’s 2026 data. Droppings in the attic and scratching sounds are early tells.
Most policies treat animal damage as a maintenance or exclusion issue, and it is not among the Insurance Information Institute’s examples of typical covered perils (wind, hail, falling trees), so it rarely pays out. Sealing gaps at the ridge, soffit, and vent penetrations with rigid metal, not foam, is the durable fix, since animals chew straight through foam. Ask the contractor to list every sealed opening on the invoice.
Flashing failure
Flashing failure is a leading source of roof leaks even when the shingles look fine, and Fixr prices flashing repairs at $200 to $600. Flashing is the metal that seals joints at chimneys, walls, valleys, skylights, and pipe penetrations. It fails from corrosion, lifted or unsealed laps, thermal movement, and poor original installation that relied on caulk instead of proper overlap.
The IRC sets minimums that make a bad install easy to spot: sidewall base flashing must be at least 4 inches high and 4 inches wide (R905.2.8.3), and an open metal valley lining at least 24 inches wide (R905.2.8.2). Rust streaks, a visible gap where the roof meets a wall, and stains directly below a chimney point to flashing, not the field shingles.
Storm damage versus normal wear: the insurance line
The practical difference between storm damage and normal wear is timing and cause: a peril that struck on a specific date versus deterioration that accrued over years. Insurers pay for the first and exclude the second, and the Insurance Information Institute’s examples of covered roof perils are wind, hail, and falling trees. Moss, curling, granule loss from age, and rot are wear.
| Signal | Points to storm damage | Points to normal wear |
|---|---|---|
| Onset | After a dated event | Gradual over years |
| Pattern | Directional, on the storm-facing slope | Uniform across the whole roof |
| Shingle look | Fresh crease, bright fracture, soft bruise | Brittle, curled, faded, bald |
| Coverage | Usually claimable | Usually excluded |
| If you see… | Likely damage type | First step |
|---|---|---|
| Soft round bruises after a storm with hail of 1 in or larger reported | Hail | Photograph, check NWS storm reports for the date, call the insurer |
| Creased or missing tabs on the windward slope after a 58 mph or stronger wind event | Wind | Tarp, document, file within the policy’s reporting window |
| Icicles plus ceiling stains along exterior walls in winter | Ice dam | Check for an R905.1.2 ice barrier at the eaves before reroofing |
| Rust or a gap where the roof meets a wall or chimney | Flashing failure | Measure the step flashing against the 4 in by 4 in minimum |
| Uniform curling, bald spots, roof over 20 years old | Structural aging | Budget for replacement; expect an inspection before insurance renewal |
| Black streaks only, no lifted edges | Algae | Low-pressure clean per ARMA; no claim |
Carriers also pay on either actual cash value (depreciated) or replacement cost value, which changes the payout even when a claim is approved, and the Insurance Information Institute notes some policies limit older roofs to actual cash value. Whether a specific loss qualifies depends on the policy wording, the state, and the age of the roof, so read the perils and exclusions before you file. For the full breakdown, see whether homeowners insurance covers roof damage, and start with the fundamentals in our roofing learning hub.
Frequently asked questions
What are the most common types of roof damage?
The most common types are wind and hail damage, followed by water intrusion and leaks. Wind lifts, creases, and removes shingles, hail bruises and cracks them, and water damage follows once the surface is breached. Fixr’s 2026 repair ranges run $700 to $4,000 for hail, $250 to $6,500 for wind or hurricane damage, and $350 to $1,500 for a leak, while moss, granule loss, and decking rot are wear problems homeowners pay for themselves.
What is the difference between storm damage and normal roof wear?
Storm damage is sudden and accidental, caused by a dated event such as hail of 1 inch or larger or winds of 58 mph or more, the National Weather Service’s severe thresholds, and it usually appears in a directional pattern on the storm-facing slope. Normal wear is gradual, uniform across the whole roof, and shows as brittle, curled, faded, or bald shingles. Insurers cover the first type and exclude the second as wear and tear.
What types of roof damage does homeowners insurance cover?
Most policies cover sudden, accidental perils; the Insurance Information Institute names wind, hail, and falling trees. Policies typically exclude wear and tear, age, rot, poor maintenance, moss, and pest damage. Coverage and payout depend on the policy, the state, the roof’s age, and whether the claim is settled on actual cash value or replacement cost value, so review your perils and exclusions before filing.
What does hail damage look like on a roof?
Hail damage looks like round, dark spots where granules are knocked off, cracked or fractured shingle mats, and dents on metal panels, vents, and gutters. A hail bruise feels soft when pressed because the mat beneath has fractured. The National Weather Service classes hail of 1 inch (quarter size) or larger as severe, which is a useful threshold for checking a roof after a storm.
How much does it cost to repair roof damage?
Fixr’s January 2026 data puts missing or damaged shingle repairs at $150 to $700, flashing at $200 to $600, a roof leak at $350 to $1,500, ice dam removal at $400 to $1,500, hail at $700 to $4,000, and a tree impact at $900 to $6,000. Costs depend on the damage type, roof pitch and material, and how much of the deck is involved. Widespread storm damage often makes full replacement the better long-term choice.
Can moss damage a roof?
Yes. Moss holds moisture against the roof surface, lifts shingle edges, and lets water wick under the course, which accelerates rot on shaded, humid slopes. Algae streaks are mostly cosmetic, but moss is a structural threat. ARMA warns against power washers and brushes on asphalt shingles, so use a low-pressure cleaning solution with a 15 to 20 minute dwell time. Insurers treat moss as maintenance, not a covered peril.