Wui Approved Roof Vents

Each vent shall not exceed 144 square inches in area and shall be covered with noncombustible corrosion resistant mesh with openings not to exceed inch or shall be designed and approved to prevent flame or ember penetration into the structure.

Wui approved roof vents. The enforcing agency may accept or approve special eave and cornice vents that resist the intrusion of flame and burning embers. Windows and exterior doors. The o hagin patented tapered low profile attic vents offer the best ventilation solution for composition shingle slate and shake roof applications. Alternatively cover all existing vent openings with 1 8 inch or 1 16 inch wire mesh.

Eave vents are available in 3 5 x 22 5 5 x 22 3 5 x 14 5 5 x 14 as well as in round configurations. Continuous vents for soffits in stucco wood construction foam stucco or retro fits. 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. I n chapter 7a of the california building code it is now required by law that new homes constructed in the wui wildland urban interface have ember and fire safe vents.

Common 1 4 screens are ineffective and should be replaced or retrofitted. Vents in soffits eaves or overhangs areas shall be an approved venting device only. These new guidelines are also mentioned in chapter 49 of the california fire code. A ridge vent and through roof vents can be seen on the roof of the building shown here.

These attic vents have been tested and shown to resist the intrusion of wind drive flames and burning embers and additionally are accepted for use by many local fire officials for installation in wui areas. Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas. Combustible vents on top of roofs may be covered with this material to comply. Ventilation openings on the underside of eaves are not permitted unless a sfm approved vent is installed or eaves are fire sprinklered or vent is 12 feet above a walking surface or grade below.

Cbc 708a crc r337 8. Use manufacured and ca approved vents see below to retrofit existing attic soffit basement foundation and gable vents where possible.