Wui Approved Roof Vents

Vents in soffits eaves or overhangs areas shall be an approved venting device only.

Wui approved roof vents.

Use manufacured and ca approved vents see below to retrofit existing attic soffit basement foundation and gable vents where possible. Dormer vents are half round low profile and dormer retro fit kits are available. 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. 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.

A strip vent in a soffited eave and frieze block vents in an open framed eave are shown here. Combustible vents on top of roofs may be covered with this material to comply. Windows and exterior doors. The enforcing agency may accept or approve special eave and cornice vents that resist the intrusion of flame and burning embers.

A ridge vent and through roof vents can be seen on the roof of the building shown here. Continuous vents for soffits in stucco wood construction foam stucco or retro fits. 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. The o hagin patented tapered low profile attic vents offer the best ventilation solution for composition shingle slate and shake roof applications.

Common 1 4 screens are ineffective and should be replaced or retrofitted. 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. 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. These new guidelines are also mentioned in chapter 49 of the california fire code.

Cbc 708a crc r337 8. Alternatively cover all existing vent openings with 1 8 inch or 1 16 inch wire mesh.