Open Eaves Roof Detail

In an open eave design the roof rafters or joists and roof sheathing are visible.

Open eaves roof detail.

Closed eaves with angled soffit closed eaves with flat soffit and no raised heel closed eaves with flat soffit and raised heel. Types of eaves. With open eaves use a sealant such as caulking to cover gaps or enclose the underside of the roof overhang. If a sprocketted or bell cast detail is used then eaves courses should be no lower than the minimum recommended roof pitch.

Fix timber fillet to set eaves courses of tiles at same pitch as general tiling. Closed eaves with angled soffit. A box eave is enclosed with a soffit. Doing so raises the eave which prevents it from conflicting with the window head height.

A closed eave has very little or no overhang extension beyond the siding. Open eaves with trusses. With a soffited eave design the roof rafters and sheathing are hidden through the use of a panel or boards that extend horizontally from the edge of the roof typically being attached to the bottom of the fascia back to the exterior wall. In open eave construction embers can and do accumulate between blocking and joists and can ignite these members if sufficient accumulation occurs.

Open eaves with ventilating rafter tray. The wallplate is secured to the internal wall separated by dpc. The wallplate is then used to secure the rafter to. The cavity is closed with a proprietary cavity closer.

To determine exactly what the rafter tail will look like i always make a full size drawing on a scrap of plywood of all the eaves elements including framing and finish materials see illustration above. Open eave construction where the rafters or trusses are exposed is common on new construction. Closed eave where an existing soffit is in place is typical of remodeling projects. The eaves detail shows where the roof members and coverings meet the wall of the dwelling.

The main component of any eaves detail is the rafter tail the part of the rafter that extends beyond the exterior wall. From left to right. The open eave blocking likely included vents so remember to add an. An open eave has a pronounced overhang often revealing projecting roof beams or brackets.

Rotted or deteriorated wooden soffits should be removed before installation of new vinyl soffits.