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Fire Hardening

Building for Safety in the Wildland–Urban Interface

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At True Vantage Homes, every home we deliver is built with the latest Wildland-Urban Interface (WUI) and fire-hardening standards in mind. These codes protect your home against wind-borne embers, radiant heat, and direct flame contact — ensuring long-term resilience in wildfire-prone areas.

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 What “Fire Hardening” Means

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Fire hardening means designing and constructing your home to resist ignition from embers and radiant heat.
California’s WUI standards (Title 24 Part 2, Chapter 7A; Title 25 CCR Subchapter 2) work alongside HUD Code (24 CFR 3280) to ensure every factory-built home meets or exceeds state wildfire-resistance criteria.

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FIRE-RESISTANT CONSTRUCTION SYSTEMS​

Roof System

  • Class A fire-rated roofing materials only

  • Non-combustible coverings and metal flashings

  • Protected gutters and edges to prevent ember buildup

 

Exterior Walls

  • Siding of non-combustible or ignition-resistant materials such as fiber-cement, stucco, or metal

  • Sealed joints and caulked penetrations to block ember intrusion

 

Underfloor & Raised Foundations

  • Fully enclosed underfloor areas with ignition-resistant materials

  • Crawlspace openings screened with 1/8-inch metal mesh

 

Vents & Openings

  • Ember-resistant vents tested to ASTM E2886/E2912 or listed by the State Fire Marshal

  • No open soffit vents; all openings protected by fine metal screening

 

Windows & Doors

  • Dual-pane glass, with at least one tempered layer

  • Solid-core or metal-clad doors with fire-resistant thresholds and trim

 

Decks & Porches

  • Decking materials tested to SFM 12-7A-4A/B standards

  • Undersides enclosed or shielded; non-combustible flashing at wall intersections

 

Eaves, Fascia & Trim

  • Non-combustible or ignition-resistant materials throughout

Closed-soffit design minimizes ember entry

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CERTIFICATION AND COMPLIANCE

  • Manufacturer certification verifying WUI-compliant construction

  • DAPIA approval (Design Approval Primary Inspection Agency) for each component system

  • HCD and HUD labels confirming both federal and state compliance

  • Documentation included in every True Vantage installation package

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SITE AND INSTALLATION STANDARDS

  • Minimum 100-foot defensible space (or to property line)

  • No combustible debris or vegetation under or around the home

  • Anchoring and utility connections per Title 25 CCR §1336.5

  • All penetrations sealed against ember intrusion

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INSPECTION AND VERIFICATION

Before occupancy, every True Vantage home is:

  • Inspected by a state-approved installer

  • Verified through HCD Form 415/416 for installation compliance

  • Reviewed by local fire authorities (when required)

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CODE REFERENCES

  • 24 CFR 3280 – HUD Manufactured Home Construction and Safety Standards

  • Title 25 CCR, Chapter 3, Subchapter 2 – Ignition-Resistant Construction Systems

  • CBC Chapter 7A / CRC R337 – Exterior Wildfire Exposure Methods

  • HCD WUI Program – hcd.ca.gov/wildland-urban-interfaces

  • SFM WUI Product Handbook – Approved building components and assemblies

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Partner with True Vantage Homes

We make it easy to choose safety, resilience, and peace of mind.
True Vantage ensures your project meets California’s toughest wildfire codes — without compromising comfort or design.

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Contact us at info@truevantagehomes.com or (626) 217-2442 to discuss WUI-compliant Prefabricated/Modular/Factory-built homes.

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