Wui Window Requirements

The listing of Wildland Urban Interface (WUI) Approved Products was created to provide a directory of WUI products in compliance with Chapter 7A of the California Building Code and Chapter R337 of the California Residential Code. The list of approved products is provided in the Building Materials Listing (BML) under the following Categories: 8110. rnational Wildland Urban Interface Code.

The purpose of this guide is to provide an overview of the building construction requirements of the new Wildland Urban Interface (WUI) Code requirements, summarize the County's interpretations and approvals, identify changes over the previous edition, and to provide referen. WINDOW REQUIREMENTS to meet Wildland Urban Interface Codes (WUIBS) Windows are considered one of the most vulnerable components of a structure when exposed to fire. Heat and/or impact from the burning embers can cause the glass to shatter, allowing entry into the building.

Note: WUI compliance requirements and applicable FHSZ are subject to emergency regulations by the state. The new 2025 California Wildland-Urban Interface Code, Title 24, Part 7 is already published and will be effective January 1, 2026 along with any additional emergency regulations incorporated by the state. Are there exceptions to WUI.

The Wildland Urban Interface (WUI) Code helps ensure businesses and residences in and around wildland areas mitigate wildfire risk because it's not a matter of "if" that happens, but "when". Building and structures located within designated WUI areas are subject to requirements for site, infrastructure and structure hardening. Permitted Building Construction in the Wildland Urban Interface (WUI) or State Responsibility Area (SRA) requires all structures to be built according to specific codes.

Wildland Urban Interface (WUI) Compliance Homeowner Checklist 2022 CBC CHAPTER 7A and CRC SECTION R337 The purpose of this code is to assist in protection of life and property by increasing the ability of the building to resist fire intrusions. New construction shall comply with the Wildland Urban Interface requirements. Wildland-Urban Interface (WUI) Checklist The Wildland-Urban Interface (WUI) Fire Area is defined per Section R337 in the 2019 California Residential Code (CRC) as a geographical area identified by the state as a "Fire Hazard Severity Zone" in accordance with the Public Resources Code Sections 4201 through 4204 and Government Code Sections 51175 through 51189, or other areas designated by.

To best assist them in determining if a product meets the code requirements, the State Fire Marshal's BML Program is accepting applications for materials that meet the new code. These materials will be listed on the SFM BML website and the Wildland Urban Interface Building Codes page of the Wildland Hazards and Building Codes website section. Exterior windows, window walls and glazed doors, windows within exterior doors, and skylights shall be tempered glass, multilayered glazed panels, glass block or have a fire protection rating of not less than 20 minutes.