Inspecting Metal Roofs for Hail: Dents vs Functional Damage

Metal roofs are the fastest-growing residential segment: 12 percent of new installs in 2026, up from 5 percent in 2015. They also drive the most contested hail claims because insurance carriers routinely deny cosmetic damage and pay only for functional failure. This is the playbook for inspecting standing-seam, stone-coated metal, and exposed-fastener panels after a hailstorm, and for winning the carrier argument.

The three metal systems

Standing seam

Vertical ribs running eave to ridge, panels 12 to 18 inches wide, concealed fastening. Typically 24-gauge steel or .032 aluminum. Service life 40 to 70 years. Premium system.

Stone-coated metal

Steel panels with granular coating resembling shingle, tile, or shake. Brands include DECRA, Boral Steel, Gerard, Unified Steel. Installed with exposed or concealed fasteners depending on product. Service life 40 to 50 years.

Exposed-fastener panel (R-panel, 5V-crimp, corrugated)

Flat or ribbed steel panels with screws through the face. Lower-cost metal, often on barns, agricultural, and budget residential. Service life 25 to 40 years.

The cosmetic vs functional argument

Every carrier has a clause in the homeowner policy about cosmetic damage on metal roofs. Most carriers since 2015 have pushed aggressively on the cosmetic exclusion, meaning a denting on a metal panel that does not compromise weatherproofing is ruled "cosmetic" and excluded from coverage.

The key phrase is functional damage. This is your argument:

• Hail has dented panels to the point of compromising paint system, which voids the manufacturer warranty
• Dents have cracked the Kynar 500 or SMP finish, leading to future corrosion
• Dents at seam locations have compromised weatherproof geometry
• Fastener heads are damaged, compromising seal and future leak risk

Cosmetic is a loss of appearance. Functional is a loss of performance. Your job is to document functional on every claim.

The dent assessment threshold

Industry tests (NAIMA, Metal Construction Association) have established:

Panel gaugeHail size for dentHail size for functional damage 29-gauge steel1.0 inch1.25 inch 26-gauge steel1.25 inch1.5 inch 24-gauge steel1.5 inch1.75 inch .032 aluminum1.25 inch1.5 inch Stone-coated steel1.0 inch (granule loss)1.25 inch

If the storm report shows 1.75-inch hail and you are inspecting 24-gauge standing seam, you have a functional damage argument. If the storm report shows 1-inch and you are inspecting 24-gauge, you have a hard case.

The inspection walk on metal

Metal is slippery. Use rubber-soled soft shoes (New Balance 574 or similar) and never canvas shoes. On standing seam, walk in the flat pans between ribs, never on the ribs themselves (ribs dent under your weight, ruining the panel).

1. Ground-level binocular sweep first, photograph every elevation
2. Climb to the ridge and work down, never up
3. Walk each panel pan, looking for dents, paint cracks, seam damage
4. At each dent, use a chalk circle and photograph with dime for scale
5. Probe dent depth with a rubber-tipped gauge (pins can scratch the finish, do not use metal probes)

Photo sequence adjusters accept

1. Overview of the slope
2. Chalk-circled dents within a 10 by 10 test square
3. Close-up of individual dent with dime for scale
4. Close-up showing paint cracking or finish failure inside the dent
5. Collateral damage on soft metal: gutters, window screens, turbine vents, downspouts

The collateral damage photos are critical. Dented aluminum gutters, crushed vent caps, and smashed A/C fins prove hail size and energy. An adjuster can argue the roof dents are pre-existing. They cannot argue your aluminum downspout was dented in 1998.

Stone-coated metal: granule loss is your friend

Stone-coated panels have the granules adhered with an acrylic overglaze. Hail strikes cause granule loss that is visibly documentable. Granule loss is a warranty-voiding condition because the granules are the UV shield for the underlying steel.

• Photograph granule loss patterns from 2 feet out
• Sweep granules from the flat pan into a ziploc bag for evidence
• Document gutter accumulation of granules
• Show the darkened acrylic layer exposed where granules were removed

Carrier resistance and how to win

State Farm, Allstate, and Farmers are the most aggressive on metal cosmetic denials in 2026. Liberty Mutual and Travelers are slightly softer. USAA tends to pay when documentation is clean.

Winning tactics:

1. Manufacturer warranty letter: get the manufacturer to confirm in writing that dents void the finish warranty. This turns cosmetic into functional.
2. Engineer letter: a licensed engineer's statement that dents compromise long-term weatherproofing is worth $350 and often unlocks a claim.
3. Partial roof replacement: push for replacement of damaged slopes only, which is easier to approve than full-roof.
4. Code upgrade argument: if partial replacement cannot match existing finish, full replacement becomes necessary under state match requirements.

The match argument on metal

Unlike shingles, metal finishes often cannot be matched after 3 to 5 years of sun fade. If the carrier approves partial replacement of 2 slopes on a 6-slope roof, the replacement panels will visually mismatch the remaining 4. Most states have a "matching" statute or insurance commissioner ruling that requires full replacement when partial cannot match.

Research your state's specific rule (Colorado, Minnesota, Oklahoma, and Texas all have favorable match language) and cite it in your supplement.

Metal roof supplement line items

• Panel replacement: $9 to $18 per square foot material, $4 to $8 labor
• Trim replacement at eave, rake, hip, ridge: $12 to $22 per linear foot
• Fastener and washer replacement: $85 to $150 per 100 square feet
• Underlayment: $42 to $68 per square
• Ice and water shield at eaves and valleys: $78 to $115 per square

For supplement strategy, see supplementing underpaid scopes. For documentation technique, read multi-slope roof inspection tactics.

Tools for metal inspection

• Rubber-tipped depth gauge: $32
• Soft-soled roof shoes: $80 to $120
• Chalk in a color that contrasts with the panel color (white chalk on dark roofs, blue on light)
• RoofKnockers inspection app with a metal roof template that auto-populates the functional damage argument language

FAQ

Can I walk a standing seam with a 12/12 pitch?

With a harness and proper rubber-soled shoes, yes. Without, no. Metal gets slick with morning dew even in dry weather.

What if the carrier refuses to acknowledge functional damage?

Get an engineer's letter and request re-inspection. If still denied, escalate to the state insurance commissioner and consider an appraisal clause invocation.

How do I price a metal roof supplement?

Pull Xactimate line items for the specific panel type, gauge, and finish. Include tear-off, disposal, underlayment, ice and water shield, and new fasteners. Do not forget trim and accessories which are often 15 percent of the material cost.