Fire Rated Roof Eaves

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.

Fire rated roof eaves.

Eaves are the overhanging ledges of a roof and are usually diagonal. If noncombustible materials fiber cement panel stucco were used as the sheathing it could also comply. Stop fire and stay stylish. Enclose overhangs with soffits that have a minimum 1 hour fire resistance rating to prevent embers and hot gases from making contact with the joists rafters or trusses or the underside of the roof decking.

A one inch 2 54 centimeter layer of stucco can easily lend a 1 hour fire rating to a wall source. Roof eaves overhangs are a fire hazard but they can be protected with an encasement of fire resistant material. Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits. Many of our eaves use a drop in style with wings that can be adjusted to your material and cut out size and are horizontally oriented.

For more information on eave construction or other fire code requirements please refer to the county s wildland urban interface summary document pds 664 or contact the county s building department fire services division at 858 565 5920. Under eave soffit vents important airflow notes. A minimum 1 hour fire resistance rating to prevent embers and hot gases from making contact with the joists rafters or trusses or the underside of the roof decking. Where when and how to determine if you need it.

Stucco is often recommended as one of the best materials for boxing in hazardous eaves.