Fire Rated Attic Vents

Approaching fire generates heat whichtriggers the vulcan vent to close.

Fire rated attic vents.

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. Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas. Use manufacured and ca approved vents see below to retrofit existing attic soffit basement foundation and gable vents where possible. Gables like dormers are vertically oriented vents best placed as high as possible.

Common 1 4 screens are ineffective and should be replaced or retrofitted. 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. It shows fire penetrating a frieze block vent with flames entering into what would be the attic. These patented attic vents are accepted for use by many local fire officials for installation in wildland urban interface wui zones.

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. Vulcan vents are listed by the california state fire marshal under category 8165 of the building material listing program. 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. Quick reference as well as more pics and info for gable vents.

Today o hagin has local and national testing approvals. The intumescent coating is designed to quickly swell up and close off when exposed to high heat. Under eave soffit vents important airflow notes. This is a photograph from a test conducted in a fire research laboratory.

The conmpany s soffit and eaves vents prohibit flame intrusion through a structure s ventilation system. As seen on this old house vulcan vents are designed to be fire and ember safe. An ember catching screen blocks dangerous embers during ember attacks long before the fire arrives. 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.

Alternatively cover all existing vent openings with 1 8 inch or 1 16 inch wire mesh. 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.