R337 Materials and Construction Methods for Exterior Wildfire Exposure — 2025 California Residential Code
California Residential Code (Title 24, Part 2.5) · 2025 edition · updated 2026-09-26 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Residential Code (Title 24, Part 2.5) § R337 · Effective January 1, 2026 · Official source: Building Standards Commission
User note: Provisions for materials and construction methods for exterior wildfire exposure are now located in Part 7, California Wild- land-Urban Interface Code. See Section R102.8, Wildland-Urban Interface.
The provisions of Part 7, California Wildland-Urban Interface Code shall apply to buildings and structures built in the wildland-urban interface (WUI).
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