Gable Roof Eave Detail

I recently built a small outbuilding with a 6 in 12 pitch roof that offers a perfect example for showing the process i use to build eaves and rakes.

Gable roof eave detail.

When understanding all metal flashings on buildings it makes sense to consider the direction in which water wants to flow. If a sprocketted or bell cast detail is used then eaves courses should beno lower than the minimum recommended roof pitch. In contrast a gable or rake is the overhang of a building that occurs on the side that is topped by a gable roof. The final step is putting the roof on the eave and addressing what happens in the gable itself.

Gables typically provided an 8 200 mm overhang and were lined to the underside but there were wide variations in how the top or apex of the gable was treated figures 2 7. Flashing 1 is a typical apron roof flashing. Start with the rafter tails the main component of any eaves detail is the rafter tail the part of the rafter that extends beyond the exterior wall. Set top of fascia board at correct level and fit ventilator in accordance with manufacturers recommendations.

Eaves with over fascia ventilation. The cleanest look for a gable end with a closed eave is to angle the soffit therefore eliminating the need to resolve the eave at the gable end. An eave is defined as the edge of the roof that overhangs the face of a wall. Figure 3 shows the shapes of each of the flashings and how they should be folded.

Gable end details for closed eaves. This configuration gives the look of an open eave but it has the same benefits ease of maintenance and energy performance as a closed eave. The sequence of assembly of flashing such a junction is critical to achieving a weathertight detail. This is the portion of the roof that protrudes beyond the side of a house or building.

Eaves courses of tiles should be at same pitch as general tiling. Figures 2 a c show the sequence for flashing the junction between the gable and ridge where there is no eave. The eave roof and gable. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley.

More refined details will have the return on the gable end smaller than the eave overhang but there still needs to be a return. Refer to my architectural roof types blog. I prefer to install the gable drip edge under the felt though that detail is less critical than at the lower roof edge or eaves.