Fire Resistant Roof And Eave Detail

Embers and hot gases from fire exterior wall cladding fascia gutter rafter underside of roof deck figure 3.

Fire resistant roof and eave detail.

Once an eave overhang or soffit has ignited fire can spread onto the roof into the attic or onto and through the exterior wall. Here are ways you can harden your home and make it more fire resistant. For the fascia use noncombustible or fire resistant materials e g fire retardant treated lumber fiber cement board. It says that eave protection can be obtained in one of three ways.

Noncombustible or fire resistant materials. As seen on this old house vulcan vents are designed to be fire and ember safe. Build your roof or re roof with materials such as composition metal. An enclosed overhang with a horizontal soffit.

The best ventilation solution for tile roof applications in areas where rain or snow may be a concern. To prevent heat buildup this house was constructed without eave overhangs which also eliminates soffit vents. Protect your home s roof. Roofs are often the most vulnerable part of a house in a fire so it goes without saying that cedar shakes are out of the question even in urban areas.

The roof is the most vulnerable part of your home. Typical construction materials for eaves overhangs and soffits are not fire resistant and are therefore susceptible to ignition by embers and hot gases. Roof eave fire resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave if fire blocking is provided from the wall top plate to the underside of the roof sheathing. In addition to all the design construction features and color choices of the o hagin standard line this patent pending attic vent features an interior stainless steel diffuser that breaks down wind driven rain and snow before it can enter the attic space.

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. 10 low cost retrofits to your home. The main objective of the eave protection requirement is to stop fire from getting into the attic. You can use ignition resistant materials or noncombustible materials on the exposed underside or the underside assembly can be tested to and pass sfm 12 7a 3.

Homes with wood or shingle roofs are at high risk of being destroyed during a wildfire. For eave vents follow the guidance in vents.