Over 2 million California homes are in designated Very High Fire Hazard Severity Zones (VHFHSZ) — areas where the state has determined wildfire risk is severe enough to mandate enhanced building standards. For roofing, this means one thing: Class A fire-rated materials are legally required.
Is your home in a VHFHSZ? Check the CAL FIRE Fire Hazard Severity Zone viewer at osfm.fire.ca.gov/divisions/community-wildfire-preparedness-and-mitigation/fire-hazard-severity-zones/ using your address.
Class A fire-rated roofing options:
- Concrete tile: Inherently Class A, widely available, common in Southern CA. Does not ignite.
- Clay tile: Inherently Class A, premium option, excellent fire performance.
- Metal roofing (standing seam or metal shingles): Class A, excellent fire resistance, growing in popularity post-wildfire rebuilds.
- Class A composition shingles: Available from major manufacturers — must specifically carry Class A designation (not all composition shingles are Class A). Look for Owens Corning Duration, GAF Timberline HDZ, or equivalent Class A products.
- Class A-rated wood shake alternatives (synthetic): Available for properties with aesthetic requirements.
Beyond the roof covering: CA Building Code also addresses ember intrusion — vents, eave details, and deck materials must meet Wildland-Urban Interface (WUI) construction requirements in VHFHSZ. Your licensed C-39 contractor should be familiar with WUI requirements in your jurisdiction.
The January 2025 LA wildfires (Pacific Palisades, Altadena/Eaton Fire) destroyed thousands of homes with non-fire-resistant roofing and building envelopes. Post-fire rebuilds are incorporating fire-resistant materials at much higher rates as homeowners rebuild smarter.