What Are the Signs You Need Storm Damage Roof Repair?

Missing or wind-lifted shingles after high winds expose the underlayment and the roof deck, and uplift concentrates at roof edges, rakes, and corners where wind damage starts, per IBHS wind research. That edge-first pattern is the clearest field signature of wind damage.

The age of the roof explains why edges fail first: the share of partially unsealed field shingles rises from under 1% on roofs 0–6 years old to over 79% on roofs 14–20 years old, per the IBHS in-situ shingle study. Once a tab unseals, wind works underneath it and lifts the course, so the high-suction zones at corners and rakes peel before the protected field does, consistent with ASCE 7 component-and-cladding wind coefficients that place the strongest uplift at those perimeter zones.

Circular bruises and granule loss on the shingle surface indicate hail impact, because functional hail damage begins at roughly 1.0 inch on aged 3-tab shingles and 1.25 inches on most asphalt products, per an American Meteorological Society hail-threshold study. Hail leaves a random pattern, distinct from the directional marks of wind-borne debris.

Dents on metal gutters, downspouts, and vent caps mark hail strikes on the softer metal accessories, the field benchmark for hail being roughly 8 functional impacts per 100 square feet, per IBHS insurer-protocol guidance. These metal dents often read more clearly than the shingle bruises and help confirm the storm hit the roof.

Granule accumulation at downspout discharge exceeding normal levels indicates a storm stripped the shingle UV layer, and granule loss exceeding 30% of the surface is the common rule-of-thumb for beyond repair, per GAF. Fresh granules in the gutter trough after a single storm separate impact loss from the slow shedding of an aging roof.

New ceiling or wall stains appearing after a storm that spread or darken after rainfall indicate an active leak through a storm-opened detail, per GAF and This Old House inspection guidance. A stain that grows with each rain confirms water is still entering, not a dried historic mark.

Rusted, lifted, or bent flashing displaced from chimneys, walls, skylights, and valleys ranks as the most common leak source, because flashing seals the transitions that roughly 90–95% of leaks trace back to, an industry estimate attributed to the NRCA. Storm-displaced flashing is a priority repair, since the metal at those transitions does the sealing the shingle field cannot.

A sound storm assessment proceeds from the ground and the attic, not the roof surface, because storm-weakened materials and wet surfaces are fall hazards, per OSHA fall-protection guidance. Binoculars from the ground and an attic check for daylight or wet decking catch most signs without a ladder.

Separating storm-caused damage from pre-existing wear governs whether a claim is covered, per Insurance Information Institute claims guidance. Hail leaves random-pattern circular bruises, wind damage concentrates at edges, rakes, and corners, and debris leaves directional punctures, while uniform deterioration across the whole roof reads as wear rather than a storm. New Jersey averages roughly 25–30 thunderstorms a year that produce summer hail and at least one coastal storm annually, with nor'easters striking most often October through April, per NOAA.