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To make a home more wildfire-resistant, reduce the places embers can collect or enter, use fire-resistant materials where practical, and clear combustible material nearest the house. Start with the first five feet around the structure, then address the roof, gutters, vents, windows, decks, and other vulnerable openings. These steps can improve a home’s chances, but they cannot guarantee it will survive a wildfire.
How wildfire reaches a home
Wildfire can threaten a building through windblown embers, direct flame contact, and radiant heat. That means home hardening is not just a matter of choosing a roof material: it combines reducing ignition vulnerabilities in the building envelope with managing combustible material around the structure. CAL FIRE describes home hardening as using construction features, building materials, and maintenance practices to increase resistance to ignition from those exposures. CAL FIRE’s Home Hardening guidance covers the building features, while its Defensible Space guidance covers nearby fuels.
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What is defensible space?
Defensible space is a buffer between a structure and surrounding areas that can help slow or halt fire and provide a safer area for firefighters. CAL FIRE identifies the first five feet around a home as the most important zone for reducing the chance that embers ignite nearby material and spread fire to the building. This is California guidance, not a universal rule for every jurisdiction: local codes, amendments, property conditions, and fire authority requirements matter. California’s Office of the State Fire Marshal notes that jurisdictions can amend the California Wildland-Urban Interface Code. Check local requirements before planning work.
Prioritize the first five feet
- Favor gravel, pavers, or concrete next to the home instead of combustible bark or mulch.
- Remove dead plants, leaves, and other debris from the ground and from roofs, gutters, decks, porches, stairs, and areas beneath the home.
- Move firewood and lumber farther from the structure, and limit combustible items stored on decks.
- Clear vegetation and other combustible material immediately around windows.
After addressing the closest area, manage vegetation and combustible materials farther from the house in accordance with local requirements. The five-foot priority is a useful starting point, not a substitute for the rules that apply to your property.
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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.
How to reduce roof and gutter vulnerabilities
The roof is a large, exposed surface where embers and flame can start an ignition. Combustible roof coverings, gaps in the roof assembly, and accumulated leaves or vegetation all create vulnerabilities. CAL FIRE recommends routine debris removal, closing gaps, and choosing a Class A-rated roof covering when replacing a roof.
When replacing a roof
CAL FIRE names asphalt composition shingles, tile or cement shingles, and metal panels as examples of Class A-rated coverings. The appropriate choice depends on the rating of the complete roof assembly, local code eligibility, the building, durability needs, and cost. The guidance does not rank these materials by price or performance, so confirm that the specific roofing system—not just a material category—meets applicable local requirements.
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- HIGH-QUALITY ROOF CAP: Steel roof cap for use with bathroom ventilation fans to maximize the air and sound performance of your bath fan
- RELIABLE: Includes a built-in, backdraft damper and bird screen to provide a dependable roof cap you can rely on
- DURABLE: Constructed of steel with a black powder coat finish to ensure durability and lasting use
- EASY INSTALLATION: Roof cap is designed to fit with either a 3" or 4" round duct to provide a simple pitched roof installation
Keep roof edges and gutters clear
Remove leaves, dead vegetation, and other debris from the roof and gutters regularly. When replacement is due, CAL FIRE recommends noncombustible gutter covers and metal gutters. Covers do not remove the need for maintenance: debris can still accumulate on roofs and around roof edges.
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Are ember-resistant vents worth it?
Vents in attics and beneath floors can let embers into a building, and plastic vents are vulnerable. Replacing a vulnerable vent with a California State Fire Marshal-approved flame- and ember-resistant product listed in the WUI Products Handbook is one option. Another is covering the opening with noncombustible, corrosion-resistant metal mesh with openings between 1/16 and 1/8 inch, as CAL FIRE recommends. A generic screen should not be assumed to provide the same protection or approval status as a listed vent.
Rank #3
- WATER PROOF – Tested to Miami-Dade TAS 100(A) standards, the SNOWVENTCO Intake Vent is engineered for high-velocity, wind-driven rain resistance in the most extreme weather. It features flexible polypropylene construction and an extra-wide flange to form a dependable, leak-proof seal. A built-in water deflector redirects rainwater flowing down the roof, while the stainless steel filter blocks rain—even in hurricane conditions up to 110 MPH—keeping your attic dry and protected.
- SNOW PROOF – Independently tested to block over 99.99% of snow and particle infiltration in 110 MPH blizzard conditions. A built-in stainless steel filter acts as a snow guard, and the arched vent design channels snow and rain away from the opening to prevent buildup and maintain airflow.
- HAIL RESISTANT – Built to withstand impact, the SNOWVENTCO Intake Vent features a crack-resistant polypropylene shell that’s twice the thickness of standard vents. Reinforced with a 304-grade stainless steel filter, it offers durable protection against hail and flying debris.
- HEAT RESISTANT – Tested for high-heat performance, the SNOWVENTCO Intake Vent maintains its strength even after prolonged exposure. Rated to a self-ignition temperature of 833°F, its UV-stabilized polypropylene resists fading, warping, and sun damage—while the built-in stainless steel filter helps block embers, offering added peace of mind in fire-prone areas.
- WIND RESISTANT – Designed for high-wind areas, the vent’s low-profile, aerodynamic shape reduces wind stress. A built-in stainless steel filter blocks particulate infiltration at wind speeds up to 110 MPH while maintaining consistent airflow.
| Option | What to check | Airflow and installation |
|---|---|---|
| Listed ember-resistant replacement vent | Confirm the product is approved and listed in the WUI Products Handbook and is suitable for the existing opening. | Have a qualified professional verify compatibility with required ventilation and local code. |
| Noncombustible metal mesh retrofit | Use corrosion-resistant metal mesh with openings between 1/16 and 1/8 inch; a generic screen is not automatically equivalent to a listed vent. | Mesh modifications may reduce airflow. Check local ventilation requirements with the building official and use a licensed contractor. |
Keep debris away from vents and seal openings around vent blocking. CAL FIRE and Ready for Wildfire both caution that vent modifications can affect airflow. Do not cover or alter vents without checking the ventilation requirements that apply to the building.
Which windows are better for wildfire exposure?
Radiant heat can break windows before flames reach a house, and single-pane and large windows are particularly vulnerable. CAL FIRE recommends dual-pane windows with at least one tempered-glass layer, and noncombustible frames where feasible. It also says metal mesh screens can improve window performance under radiant heat.
Rank #4
- AIRFLOW: Cor-A-Vent Ridge Vent V-600 provides 20 sq. in. of NFA per linear foot and can be used for nearly every pitch from 3/12 to 16/14
- SIZING: Comes in 11 in. and 8 1/2 in. widths and is available in the standard V-600 version or the Enhanced Snow Screen V-600E version that allows air out of your attic, but prevents weather from getting in
- VERSATILE: Designed to be used with shingle, cedar shake, metal, and tile roofs
- EASY TO INSTALL: This ridge vent is sold by the bundle of 12 pieces each measuring 4 ft. long. Each bundle also comes packaged with 2 1/2" roofing nails and end plugs making it easy to install.
CAL FIRE states that tempered glass is “about four times more resistant to breaking during a wildfire” than ordinary glass. The agency’s page does not give a publication year or identify the underlying study, so treat this as CAL FIRE’s stated comparison—not as a quantified guarantee that a window or home will survive. Window size, glazing, framing, and nearby exposure all matter; the guidance does not establish one universally best window product.
Plan upgrades around the home’s weakest points
- Walk the property. Note combustible material within five feet, debris on roofs and gutters, exposed vents, vulnerable windows, and combustible items on decks or under the home.
- Address maintenance first. Clear debris and dead vegetation, move stored firewood and lumber farther away, and remove combustible items nearest the structure.
- Identify code-sensitive work. Before changing vents, roofing, or windows, ask the local building or fire official what rules and ventilation requirements apply.
- Choose upgrades for the actual assembly. For roof replacement, verify the Class A rating of the roof system. For vents, verify listing and airflow compatibility. For windows, consider glazing, framing, size, and exposure together.
- Use qualified help where needed. Hire a licensed contractor for vent modifications and other work that could affect code compliance or building performance.
- Keep up maintenance. Recheck the roof, gutters, vents, decks, and near-home area for new debris or combustible buildup.
California state guidance is a practical reference, but it does not replace local code review. The California Office of the State Fire Marshal’s Building in the Wildland information explains the state WUI-code context and the possibility of local amendments.
Quick Recap
Best Value
- 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.
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