Fire Resistant Attic Vents

2007 cbc section 704a 2 attic ventilation.

Fire resistant attic vents.

The roof is the most vulnerable part of your home. An ember catching screen blocks dangerous embers during ember attacks long before the fire arrives. See our retrofits and subflashings. Here are excerpts from that code and part of a discussion of the absence of a method of acceptance for special eave vents and a resolution that permits use of a fire resistant soffit vent from vulcan technologies.

Fire officials later told booster that while flames didn t engulf his home from the outside hot embers likely flew into the soffit vents the holes in the wood under the roof allowing an attic to. These patented attic vents are accepted for use by many local fire officials for installation in wildland urban interface wui zones. Ember and wildfire resistant vulcan vents. O hagin universal direct deck attic vents this attic vent provides maximum net free ventilation area nfva and is designed for mop in or dry in applications using tile shingles slate or shake.

For when re installing vents is impractical but you still want to fire proof your attic you need vulcan retrofits. Low cost retrofit list roof. Still o hagin has submitted testing information to osfm and has been accepted as an ember and flame resistant vent. Flame ember resistant vents naturally provide less airflow than regular unprotected vents and brandguard vent airflow ratings nfva are approximately 30 that of the same size standard 1 4 screened vent and are listed within each products description.

Except for corrosion resistant metal language chapter 7a doesn t restrict through roof vents. Fire protection vents and filters prevent fire embers wind driven rain dust debris and nesting animals and rodents from entering your home through the attic vent. Build your roof or re roof with materials such as composition metal. It shows fire penetrating a frieze block vent with flames entering into what would be the attic.

Homes with wood or shingle roofs are at high risk of being destroyed during a wildfire. When a wildfire nears and the vent reaches the critical temperature the intumescent coating on the matrix structure expands creating an insulating barrier from fire and embers. By replacing your existing vents with an embers out vent your home will have an added layer of protection from the elements. Model building code section s at issue.

When used in conjunction with lower soffit or eave vents rapid cooling and venting of the attic can take place. Wind blown embers can also enter through vents and depending on the ember size and quantity and the amount of combustible materials in the attic or crawl space ignitions can occur. Vent screens don t impede flame entry. Vents accepted by the osfm have provided testing information that was conducted by an accredited fire testing laboratory.