Roof Insulation Eaves Detail

The next important aspect is to detail the eaves allowing adequate ventilation and simple methods to achieve this are indicated in figs.

Roof insulation eaves detail.

Fix timber fillet to set eaves courses of tiles at same pitch as general tiling. Detail summary detail to show the buildup of new loft insulation to the underside of an existing eaves installed internally to allow ventilation of the existing roof over the new insulation. The architect john milnes baker defines eaves in this simple way. Smart vent a special roof eaves vent product that provides a 3 4 opening about 6 above the top of the roof.

A notch is taken out of the rafter known as the birds mouth. Venting solutions for roofs with no overhang or soffit. The cavity is closed with a proprietary cavity closer. Order and install oversized or raised heel trusses figure 3 or install site built rafters with raised top plates figure 4.

The wallplate is secured to the internal wall separated by dpc. The cavity is closed with a proprietary cavity closer. Specify 2 to 2 foot overhangs which are higher providing more room for insulation at the top plate and additional window shading. The eaves detail shows where the roof members and coverings meet the wall of the dwelling.

Fix a rafter spacer tray to provide a clear air path between underlay and insulation. Download dwg file. The lower edge of a roof which projects beyond the face of the wall. Open eaves with ventilating rafter tray.

Install special roof intake venting products that work at the lower edge of the roof decking underneath the first course of shingles. 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. A minimum ventilation gap of 25mm is to be provided over the loft insulation to allow sufficient ventilation at the eaves. The wallplate is then used to secure the rafter to.

Eaves detail the eaves detail shows where the roof members and coverings meet the wall of the dwelling. In cool or cold weather moisture laden air drawn into the attic or roof cavity will leave its moisture as condensation on the roof deck underside or in the attic or roof insulation. The wallplate is secured to the internal wall separated by dpc. If a sprocketted or bell cast detail is used then eaves courses should be no lower than the minimum recommended roof pitch.

How to construct a roof with full insulation at the eaves.