Fire Rated Attic Vents

Gables like dormers are vertically oriented vents best placed as high as possible.

Fire rated attic vents.

It shows fire penetrating a frieze block vent with flames entering into what would be the attic. 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. 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. This is a photograph from a test conducted in a fire research laboratory.

As seen on this old house vulcan vents are designed to be fire and ember safe. 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. From its founding roots as a roofing company over 40 years ago o hagin has grown into a nationally recognized designer and producer of top quality state of the art attic ventilation solutions. The core of our fire and ember safe vents are manufactured out of hi grade aluminum honeycomb and coated with an intumescent fire proof coating.

The intumescent coating is designed to quickly swell up and close off when exposed to high heat. Use manufacured and ca approved vents see below to retrofit existing attic soffit basement foundation and gable vents where possible. Alternatively cover all existing vent openings with 1 8 inch or 1 16 inch wire mesh. Vulcan vents are listed by the california state fire marshal under category 8165 of the building material listing program.

An ember catching screen blocks dangerous embers during ember attacks long before the fire arrives. Approaching fire generates heat whichtriggers the vulcan vent to close. The vulcan vents are the only fire resistant vents that meet both the wildland urban interface wui and the one 1 hour fire test standards for the exterior of buildings all while providing the proper amount of ventilation to attic and crawl spaces in building structures. Quick reference as well as more pics and info for gable vents.

Is recognized for its industry leading efforts in research development and testing. Under eave soffit vents important airflow notes. The conmpany s soffit and eaves vents prohibit flame intrusion through a structure s ventilation system. Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas.

Today o hagin has local and national testing approvals. Common 1 4 screens are ineffective and should be replaced or retrofitted.