Wui Approved Roof Vents

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.

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. 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. Combustible vents on top of roofs may be covered with this material to comply. Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas.

The o hagin patented tapered low profile attic vents offer the best ventilation solution for composition shingle slate and shake roof applications. 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. 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. These new guidelines are also mentioned in chapter 49 of the california fire code.

Windows and exterior doors. Dormer vents are half round low profile and dormer retro fit kits are available. 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. A strip vent in a soffited eave and frieze block vents in an open framed eave are shown here.

Continuous vents for soffits in stucco wood construction foam stucco or retro fits. Cbc 708a crc r337 8. Common 1 4 screens are ineffective and should be replaced or retrofitted. Alternatively cover all existing vent openings with 1 8 inch or 1 16 inch wire mesh.

Use manufacured and ca approved vents see below to retrofit existing attic soffit basement foundation and gable vents where possible. A ridge vent and through roof vents can be seen on the roof of the building shown here.