FireApproved

California / Siding

Siding in California

Statewide California requires CWUIC 2025.

The rule

Adopted “Noncombustible materials.”

California noncombustible wall. The 2025 California Wildland-Urban Interface Code includes noncombustible materials as an exterior-wall and exterior-wall-covering path.

Products matching California’s adopted requirements

Adopted Product matches below are limited to siding and trace to the named requirement.

Additional products matching the model-code floor

Model code Product matches below are limited to siding and trace to the named requirement.

No sourced siding product in this directory yet matches the model-code floor.

Additional products matching the voluntary program

Voluntary program Product matches below are limited to siding and trace to the named requirement.

No sourced siding product in this directory yet matches the voluntary program.

Every sourced row for this part of the house

  • Adopted California noncombustible wall — The 2025 California Wildland-Urban Interface Code includes noncombustible materials as an exterior-wall and exterior-wall-covering path.
  • Adopted California one-hour exterior wall — The 2025 California Wildland-Urban Interface Code includes one-hour fire-resistance-rated construction on the exterior side as an exterior-wall path.
  • Adopted California SFM 12-7A-1 wall — The 2025 California Wildland-Urban Interface Code includes exterior-wall assemblies meeting SFM Standard 12-7A-1 performance criteria.
  • Model code 2018 IWUIC Class 1–2 noncombustible wall — The unamended 2018 IWUIC includes approved noncombustible material as an exterior-wall path in Class 1 and Class 2 construction.
  • Model code 2021 IWUIC Class 1–2 noncombustible wall — The unamended 2021 IWUIC includes approved noncombustible material as an exterior-wall path in Class 1 and Class 2 construction.
  • Model code IWUIC Class 1–2 noncombustible wall — The unamended 2024 IWUIC model code includes approved noncombustible material as an exterior-wall path in Class 1 and Class 2 construction.
  • Model code IWUIC Class 1 wall-base protection — The unamended 2024 IWUIC model code specifies a six-inch vertical metal or noncombustible wall-base detail at ground, deck, and roof intersections for Class 1 construction.
  • Voluntary program IBHS Base six-inch wall-base protection — The current IBHS Base standard specifies at least six vertical inches of noncombustible material at the base of exterior walls.