Protecting a home from wildfire embers during construction takes coordinated decisions about the roof, vents, eaves, windows, doors and attached features—not a single product. Embers can arrive ahead of a fire front and enter through small openings or ignite combustible details. Plan the whole building with qualified construction professionals, confirm local code and product requirements with the building official, and address nearby fuels as well as the structure.
Start with the site, hazard and local requirements
Before choosing materials, identify the project’s wildfire exposure, locally adopted building-code edition, whether the site falls within a wildland–urban interface (WUI) area, and any requirements imposed by the local fire authority. Product approvals and construction rules vary by jurisdiction; the guidance cited here does not establish one universal code requirement.
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NIST’s construction guidance catalogs 40 ember vulnerabilities and associated hardening actions. It says implementation should be by qualified people following applicable codes, standards and industry practice. CAL FIRE likewise advises consulting the local building official and a licensed contractor before making vent changes. NIST’s instruction is concise: “All structures and property should be fully protected from embers.”
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Embers can travel beyond the immediate fire front. CAL FIRE says they can ignite homes up to a mile away; treat that as general guidance, not a project-specific risk estimate or a guaranteed travel limit. CAL FIRE’s home-hardening guidance is a useful starting point, but local officials must confirm what applies to the project.
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- Flame-Resistant Aluminum Vent Mesh - Phifer Ember Screen features a proprietary flame-resistant coating over durable aluminum, adding a critical layer of fire protection for your home's ventilation points. This ember resistant mesh is engineered to block dangerous airborne embers from entering through vents, eaves, roof-assembly gaps, and under-decking areas - a key component of any home fire protection system.
- Maximum Airflow, Minimum Ember Penetration - This mesh vent cover is tightly woven to block more embers than traditional aluminum vent mesh while still allowing essential airflow into your home. As a fire screen mesh, it provides proven flame and ember intrusion resistance under rigorous ASTM testing. For homeowners serious about fire safety, it's a simple upgrade with significant impact.
- Code-Compliant Vent Screen Home Hardening Protection - Ember Screen aluminum vent mesh is compliant with California Building Code Chapter 7A for ember-resistant venting in new construction and old builds. This fire hardening outdoor vent cover fits easily into new builds and retrofits as part of a complete home wildfire protection system, with a discreet installation that blends into any home design. Reliable wildfire protection for homes in WUI zones.
- Versatile Vent Screens for Air Vent Applications - This fire prevention vent screen is ideal for safeguarding critical ventilation pathways including soffit vents, gable vents, ridge vents, gutter covers, eaves, and under-decking areas. The corrosion-resistant aluminum vent mesh cover delivers lasting home fire safety while maintaining the airflow your home needs. Available in black, 6" width, 100' roll length.
- Durable, Corrosion-Resistant & Made in the U.S.A. - This fire safety for home mesh is built from corrosion-resistant aluminum with a flame-resistant coating for long-term performance outdoors. A critical component of a broader fire protection or fire suppression system, Phifer Ember Screen is proudly made in the U.S.A. with over 70 years of screening expertise. Reliable wildfire protection and home fire protection without compromise.
Specify the roof as a complete assembly
Choose a fire-rated roof covering accepted for the location, then resolve the interfaces where embers can lodge or enter. Include roof edges and flashing, skylights, dormers, penetrations, and gaps beneath tiles or shingles in the plans and specifications. CAL FIRE recommends fire-rated roof materials and closing roof gaps; NIST’s vulnerability catalogue separately identifies roof flashing, skylight interfaces and roof coverings with openings.
Detail the chosen assembly so that transitions and penetrations are compatible with its fire performance and the applicable code. Plan for future inspection and removal of debris from the roof and gutters. A gutter cover does not remove the need to check and clear accumulated debris.
Protect vents without compromising required airflow
Start with a complete inventory of openings: attic, ridge, off-ridge, gable and under-eave vents, as well as crawl-space, dryer and makeup-air openings. Different vent types and locations create different vulnerabilities, so do not treat a single screen detail as a solution for every opening.
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- Stainless steel mesh 1/16 in. openings (black powder coated)
- Helps resist wind-driven embers during wildfire events
- Keeps rodents and pests out
- Durable, corrosion-resistant construction
- Easy to cut and fasten for custom installations
CAL FIRE describes corrosion-resistant metal mesh with openings from 1/16 inch to 1/8 inch and recommends considering California State Fire Marshal-approved ember- and flame-resistant vents. It also warns that vent modifications may reduce airflow. Before specifying mesh or a replacement vent, have the project team verify the required net free ventilation, the approval applicable to that opening and the installation detail with the local official and a qualified contractor. Do not cover or reduce vent area based only on a general mesh recommendation.
| Vent decision | What to verify |
|---|---|
| Corrosion-resistant metal mesh | Whether the mesh opening range CAL FIRE describes is appropriate for the specific opening, and whether the screened assembly still provides required net free ventilation. |
| Authority-approved ember- and flame-resistant vent | Approval for the project’s jurisdiction and intended opening; ventilation capacity; installation requirements; corrosion resistance; and maintenance access. |
A listing or approval is not a guarantee of identical performance under every fire exposure. In NIST’s 2025 experimental series, tested eave vents performed differently under very large exposures. Treat those findings as evidence about the tested products and conditions, not as a blanket ranking of all vents.
Close vulnerable eave details—and understand test limits
Where appropriate for the design and local requirements, box in vulnerable open eaves with suitable ignition-resistant or noncombustible construction. Detail blocking and penetrations so gaps are closed with compatible materials. Account for the relationship between the roof and wall, including horizontal and vertical under-eave vents.
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- Stainless steel mesh 1/16 in. openings (black powder coated)
- Resist wind-driven embers during wildfire events
- Keeps rodents and pests out
- Durable, corrosion-resistant construction
- Easy to cut and fasten for custom installations
NIST Technical Note 2341, published June 18, 2025, reports one experimental series involving three commercially available fire-resistant eave vents. The vents were tested at 1.5 MW to 2.5 MW, compared with 300 kW specified by existing test methods. Under those unusually large exposures, the tested intumescent-coated baffle vents performed better than the tested intumescent-coated honeycomb-core vents. The tested honeycomb-core vents permitted flame penetration, particularly when the eave ignited. In the tested setup, eave ignition was associated with flame jetting and sustained heat flux; higher fuel packing density in tested sheds produced more focused flame jetting and increased the likelihood of eave ignition.
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These results concern specific vents and experimental conditions; they do not establish how every listed product will perform in every building or wildfire. Use applicable approvals, assembly details and local code review when selecting a vent rather than extrapolating from a single test series.
Specify windows, doors and wall materials together
CAL FIRE recommends dual-pane windows with at least one tempered pane, screens on operable windows, limiting large windows facing vegetation, and avoiding flammable siding in favor of materials such as stucco or fiber cement. NIST’s catalogue also identifies single- and double-pane windows, exterior doors, sliding and screen doors, and garage doors as vulnerabilities.
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- Flame-Resistant Stainless Steel Screen Mesh - Phifer Ember Screen features a proprietary flame-resistant coating that goes beyond standard metal screening, adding a critical layer of fire protection for your home. This ember resistant mesh is engineered to block dangerous airborne embers from entering through windows, doors, and patio enclosures, and perimeter fencing during wildfire events - a key component of any home fire protection or fire suppression system.
- Dual-Purpose Insect and Ember Protection - Ember Screen stainless steel mesh combines everyday insect screening with wildfire ember defense in one product. This fire screen mesh keeps insects out year-round while providing proven flame and ember intrusion resistance under rigorous ASTM testing. For homeowners serious about fire safety, it's a simple upgrade with significant impact. Unlike bulky fire barriers that block your view, this home fire safety screen maintains outward visibility.
- Perimeter Fencing for First Line of Fire Defense - Ember Screen stainless steel mesh is an ideal fire screen for perimeter fencing applications, adding a flame-resistant barrier between your property and approaching wildfires. This ember resistant mesh installs over existing fence lines to help block airborne embers before they reach your home, creating a critical first line of wildfire protection for homes in WUI zones.
- Meets CAL FIRE Home Hardening Recommendations - EmberScreen is an essential part of a complete fire hardening home wildfire protection system, developed to support CAL FIRE's recommendations for reducing fire vulnerabilities. This wildfire protection for homes solution fits easily into new builds and retrofits, with a discreet, low-profile installation that blends into any home design.
- Durable, Corrosion-Resistant & Made in the U.S.A. - This fire safety for home mesh is built from corrosion-resistant stainless steel with a flame-resistant coating for long-term performance outdoors. A critical component of a broader fire prevention and fire protection system, Phifer Ember Screen is proudly made in the U.S.A. with over 70 years of screening expertise. Reliable wildfire protection without compromise.
Specify compatible, code-compliant assemblies for the actual openings and exposures. Include frames, glazing, screens, door types and wall transitions in the design review; a screen alone does not address every route an ember or flame can exploit.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Include decks, fences and other attachments in the design
Attached features can create a path from nearby fuel to the building. CAL FIRE recommends ignition-resistant deck materials and removing flammable material beneath decks. It also recommends a noncombustible transition where a fence connects to the home. NIST identifies deck-to-wall intersections, spaces between deck boards, combustible deck materials, attached fences, stairs, retaining walls and pergolas as vulnerabilities.
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- DUAL-PURPOSE PROTECTION – Tightly woven mesh helps block embers and animals while maintaining clear outward visibility.
- DESIGNED FOR VERTICAL OPENINGS – Ideal for windows, doors, and patio enclosures where airflow, comfort, and visibility matter alongside ember protection.
- DURABLE, FLAME RESISTANT CONSTRUCTION – Features a flame-resistant coating over corrosion-resistant stainless steel or aluminum mesh for long-term outdoor performance.
- CODE-TESTED PERFORMANCE – Tested to meet ASTM E2886 ember intrusion resistance standards and ASTM E84/UL 723 flame spread requirements.
- VERSATILE & EASY TO INSTALL – Available in black with 36”, 48”, and 60” widths and 25’ or 50’ roll lengths, suitable for both new construction and retrofit applications.
Coordinate the specification and construction review
Use the plans, product submittals and field review to make sure individual decisions work together. NIST’s construction catalogue is a useful checklist across building elements; CAL FIRE’s guidance covers practical measures for roofs, vents, windows, decks, walls and eaves.
- Confirm the applicable code edition, WUI designation, fire-authority rules and product approvals with the local building official.
- Show roof interfaces, penetrations, eaves and wall transitions in construction details rather than relying on a general material note.
- Document how each screened or replacement vent meets both approval requirements and required ventilation for its intended location.
- Review doors, windows, decks, fences and other attachments as connected parts of the building’s ember-exposure pathways.
- Set out a maintenance plan for roof and gutter debris and for keeping combustible material away from vulnerable building edges.
No single product or construction measure makes a home fireproof. The available sources do not establish a universal percentage reduction in ignition risk from any one measure, so avoid treating a product claim or isolated detail as a quantified guarantee.
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