Ember Mesh
Implementing fine wire mesh around vulnerable interfaces such as decks and vents is a critical mitigation strategy for structures located in wildfire-prone regions. Wind-driven embers are a primary vector for igniting homes during a wildfire, capable of traveling significant distances and lodging in small gaps or directly entering attic and crawl spaces through unprotected openings. By effectively blocking these burning particles while still allowing necessary airflow, ember mesh prevents ignition at these key entry points, which are particularly susceptible due to their design or function. Consequently, this simple yet essential measure significantly reduces the overall ignition risk to the structure, substantially enhancing its resilience against the destructive forces of wildfires.
Our Services
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The Basics
Ember mesh represents a critical component in wildfire mitigation strategies for protecting structures. Recognizing that wind-borne embers are a primary ignition source during wildfires, this fine-gauge screening, often constructed from metal alloys, serves as a physical barrier. It is specifically designed to cover vulnerable exterior openings such as vents, eaves, and crawl spaces, effectively preventing hot embers from entering.
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Cal Fire
CAL FIRE recommends using non-combustible, corrosion-resistant metal mesh with openings between 1/16 and 1/8 inch (1.6 and 3.2 mm) to cover attic and underfloor vents to prevent embers from entering homes during wildfires. This helps protect homes from ember ignitions, a primary cause of structural loss during wildfires.
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Being Proactive
Embers are a primary cause of home ignition in wildfires: Up to 90% of homes lost during wildfires are ignited by windblown embers, according to Wildfire Defense Mesh. These small, burning pieces can travel long distances and ignite flammable materials that accumulate around and within homes. In many wildfire-prone regions, building codes, such as Chapter 7A of the California Building Code, mandate the use of ember-resistant materials.
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Ember mesh acts as a barrier: It's specifically designed with small aperture openings (typically 1/8 inch or less) to block embers from entering vulnerable areas like vents, attics, crawl spaces, and under decks.
Wildfire Defense Mesh, Originally created in 2009 to help protect against bushfires in the harsh Australian climate, our Wildfire Defense Mesh 98 is proven to be at least 98% effective at blocking dangerous embers that cause ignition. Now, Wildfire Defense Mesh is available in the US.
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Aperture: 0.0657” / 1.67mm
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Wire Diameter: 0.0177” / 26 SWG / 0.45 mm
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Finish: Black Powder Coat Finish
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Weave Type: Plain Weave
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Approx Weight: 0.245 lbs/ft2 / 1.2kg/m2
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Approx % open area: 62%
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Stainless Steel Grade: 304
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Flame and Ember Resistant Vent
Chapter 7A, 706A2
Wildfire Defense Mesh meets the requirements of the CBC, Chapter 7A 706A.2 when tested to ASTM E2886 (Vertically Installed)
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Off Ridge and Ridge Vents
Chapter 7A, 706A2.1
Wildfire Defense Mesh meets the requirements of the CBC, Chapter 7A 706A.2 – Off Ridge and Ridge Vents
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FireZone Exteriors is a leading provider of comprehensive exterior fire defense products and applications designed to safeguard homes and structures from the devastating effects of wildfires. Implementing comprehensive exterior fire protection measures is a critical component of safeguarding residential structures against wildfire and structural ignition. This involves the strategic selection and application of materials designed to resist ignition and slow fire spread, such as Class A rated roofing materials, non-combustible siding options (like fiber cement or stucco), and fire-resistant decking. Employing intumescent coatings or fire-retardant treatments on vulnerable surfaces can further enhance protection by creating a barrier that expands upon exposure to heat, significantly minimizing the risk of ember intrusion and preventing the rapid vertical spread of flames. Consequently, integrating these specialized products into exterior construction and maintenance provides an essential layer of defense, significantly enhancing the structure's resilience against fire threats.
We source and use wildfire protection information from the following agencies
