Southern California's fierce Santa Ana windstorms regularly bring gusting winds exceeding 50 to 70 mph across Lakewood and Los Angeles County. Following a major weather event, homeowners frequently wonder whether damaged shingles are covered under property insurance or if the roof simply reached the end of its natural lifespan. Understanding the difference between sudden wind damage and normal wear and tear is essential when filing a claim.
Physical Characteristics of Wind Damage
Wind damage is classified by insurance adjusters as a direct, sudden, and accidental physical loss caused by aerodynamic uplift pressure and turbulent turbulence:
- Horizontal Tab Creasing: When wind breaks the thermo-adhesive seal strip binding shingle courses together, shingles flutter upward. This creates a distinct horizontal fracture or crease across the top of the shingle tab where ceramic granules dislodge in a straight line.
- Torn or Blown-Off Shingle Sections: Entire shingle tabs ripped cleanly from their fasteners, leaving exposed underlayment or exposed nail heads visible from the ground.
- Dislodged Ridge and Hip Caps: High ridge lines experience the highest suction uplift forces during windstorms. Torn or missing cap shingles are prime indicators of storm damage.
- Uplifted Perimeter Flashing: Drip edges along rakes and eaves that have been bent upward or peeled back by turbulent vortex winds.
| Damage Type | Wind Damage (Insurance Covered) | Wear and Tear (Maintenance / Non-Covered) |
|---|---|---|
| Shingle Adhesion | Cleanly unsealed shingle tabs with localized creasing | Gradual seal strip failure across entire south-facing roof plane |
| Granule Loss | Concentrated granule gouges along flex crease lines | Even, widespread erosion across all shingles exposing fiberglass mat |
| Curling & Cupping | Not present unless combined with wind uplift | Widespread concave or convex curling from chronic attic heat |
| Tile Displacement | Shattered tiles from wind-blown tree debris or shifted hips | Hairline thermal expansion cracks and weathered mortar caps |
Physical Indicators of Normal Wear and Tear
As asphalt shingles age under intense Southern California UV sunlight, volatile oils within the asphalt evaporate, causing natural aging signs:
- Thermal Blistering: Moisture trapped during manufacturing forms tiny volatile steam blisters in hot attics, popping to reveal tiny circular pits with intact asphalt rings.
- Widespread Granule Erosion: Natural wash-off of protective ceramic granules due to decades of rainfall and UV exposure, leaving the shiny fiberglass backing exposed.
- Craze Cracking: Random, spiderweb-like hairline surface fissures caused by decades of diurnal temperature swings (thermal expansion and contraction).
ASTM Wind Resistance Standards (Class D, F, H)
Under ASTM D7158 and ASTM D3161 laboratory wind testing protocols, shingles receive standardized wind ratings. Class F shingles withstand continuous 110 mph winds, whereas Class H products resist gusts up to 150 mph. Older Lakewood homes with aged 3-tab shingles (rated only to 60 mph) are especially susceptible to tab blow-off during strong Santa Ana windstorms.
Navigating the Insurance Claim Process
Under California Insurance Regulations, adjusters look for verified storm evidence on official National Weather Service storm dates. If legitimate wind creasing or tab tearing exists, policies generally cover full localized repairs or full slope replacement if matching shingles are unavailable. Contact a licensed contractor for an emergency roof assessment to document all damage thoroughly.
Documenting Storm Damage for Your Insurance Claim
If a severe storm passes through Lakewood, photograph all visible debris and fallen shingles on your lawn before cleaning them up. Avoid climbing onto steep wet roofs; instead, contact a certified technician for emergency roof repair and professional photo documentation to submit to your insurance carrier.