Open Eaves Roof Detail

The eaves detail shows where the roof members and coverings meet the wall of the dwelling.

Open eaves roof detail.

A box eave is enclosed with a soffit. The wallplate is secured to the internal wall separated by dpc. 8 23b allows any water which may have penetrated through the tile to run down the roof slope into the gutter in the normal manner. Open eave construction where the rafters or trusses are exposed is common on new construction.

A closed eave has very little or no overhang extension beyond the siding. Closed eaves with angled soffit. Closed eaves with angled soffit closed eaves with flat soffit and no raised heel closed eaves with flat soffit and raised heel. In an open eave design the roof rafters or joists and roof sheathing are visible.

Rotted or deteriorated wooden soffits should be removed before installation of new vinyl soffits. When designing an open eave with roof trusses make sure that you raise the heel of the truss and use a thicker top chord. The main component of any eaves detail is the rafter tail the part of the rafter that extends beyond the exterior wall. An open eave has a pronounced overhang often revealing projecting roof beams or brackets.

Closed eave where an existing soffit is in place is typical of remodeling projects. The wallplate is then used to secure the rafter to. 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. A roof can come to an end in basically three ways.

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. Open eaves with ventilating rafter tray. The next important aspect is to detail the eaves allowing adequate ventilation and simple methods to achieve this are indicated in figs. Doing so raises the eave which prevents it from conflicting with the window head height.

From left to right. If a sprocketted or bell cast detail is used then eaves courses should be no lower than the minimum recommended roof pitch. Open eaves with trusses. Fix timber fillet to set eaves courses of tiles at same pitch as general tiling.