Pitched Roof Eaves Detail

The three primary variables to consider when designing the eaves for a gable roof are the width of the gable trim the projection of the eaves and the details at the corner of the gable ends.

Pitched roof eaves detail.

The main component of any eaves detail is the rafter tail the part of the rafter that extends beyond the exterior wall. Published on apr 7 2020 this video is about drawing a pitched roof eaves detail showing how the truss connects to the top of the wall. The wallplate is secured to the internal wall separated by dpc. In some cases a closed or flush eaves can be designed which stops the rafters and ceiling joists at the face of the external wall where a fascia board is then fixed to the ends of the joists and the rafters.

This first installment of a two part series focuses on eaves that do not return onto the gable. The cavity is closed with a proprietary cavity closer. A notch is taken out of the rafter known as the birds mouth. If a sprocketted or bell cast detail is used then eaves courses should be no lower than the minimum recommended roof pitch.

The eaves of a pitched roof tend to extend around 150 300mm beyond the external face of the wall to provide protection from rain. 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. Also shows you some tips and essentials for creating details. Fix a rafter spacer tray to provide a clear air path between underlay and insulation.