Fire Rated Roof Eaves

Where when and how to determine if you need it.

Fire rated roof eaves.

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

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. Stop fire and stay stylish. A one inch 2 54 centimeter layer of stucco can easily lend a 1 hour fire rating to a wall source. If noncombustible materials fiber cement panel stucco were used as the sheathing it could also comply.

Eaves are the overhanging ledges of a roof and are usually diagonal. Eaves without suffixes or with rt are for rafter and truss installation where spacing is commonly imprecise. Under eave soffit vents important airflow notes. Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits.

If exterior rated fire retardant products were used in the assembly plywood sheathing 2x rafter tails and blocking the assembly would comply because ignition resistant materials were used.