Open Eave Roof Detail

A closed eave has very little or no overhang extension beyond the siding.

Open eave roof detail.

Mc10b eave flush wall. Mc08a roof layout quick reference. A normal generic assembly could consist of 2x rafter tails acx plywood sheathing and 2x4 or 2x6 blocking between the rafter tails. 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.

Mc08 roof layout. Doing so raises the eave which prevents it from conflicting with the window head height. A box eave is enclosed with a soffit. Mc10c low slope ventilated eave detail.

A closed eave doesn t have much of an overhang while an open eave sticks out well beyond the roof. 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. 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. A roof can come to an end in basically three ways.

Mc10 raised fascia. Mc10a down slope eave details.