Open Eave Roof Detail

A box eave is enclosed with a soffit.

Open eave roof detail.

Mc08 roof layout. Mc10c low slope ventilated eave detail. 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. A closed eave has very little or no overhang extension beyond the siding.

When you look at the open eave detail you see the rafter tails the blocking and the roof sheathing that extends beyond the exterior wall. A normal generic assembly could consist of 2x rafter tails acx plywood sheathing and 2x4 or 2x6 blocking between the rafter tails. An open eave has a pronounced overhang often revealing projecting roof beams or brackets. A roof can come to an end in basically three ways.

Craftsman an architectural style often used on bungalows in the early 20th century featured. Mc08a roof layout quick reference. A closed eave doesn t have much of an overhang while an open eave sticks out well beyond the roof. Mc10 raised fascia.

Open eaves with trusses when designing an open eave with roof trusses make sure that you raise the heel of the truss and use a thicker top chord. Doing so raises the eave which prevents it from conflicting with the window head height.