How Far Should Roof To Wall Flashing Overhang The Eaves

Eaves are located at the down slope edge of a sloped roof and serve as the transition between the roof and fascia wall.

How far should roof to wall flashing overhang the eaves.

One common method is to lay the edge metal under the eaves membrane and over the rake image. The sketch above illustrates the end profile of roof drip edge flashing and shows its placement on the roof. Usually you won t see much of drip edge as it s under the roof shingles under the underlayment and behind the roof gutter. A typical metal roof overhang may be 2 to 4 inches or even less.

Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. Lengths of drip vary but typically it s sold in ten foot lengths 120. An eave typically has a metal edge flashing and gutter that are attached to a wood fascia trim board.

With composite siding such as boral s truexterior siding over a ventilated rain screen and with properly executed flashing at the windows and doors the walls on the fhb house will be able to handle rain just fine. Too little can allow water to seep into rake or fascia boards. Two feet is the general maximum length for a typical roof overhang. Overhangs can vary from a few inches to a few feet depending on preference.

Roof overhangs at the eaves and rakes protect the walls below from rain and sun. Too much overhang and the shingles could blow off in high winds. This can make extensive roof overhangs more trouble than they are worth in all but the harshest climates. However the suggested width of an overhang is between 12 and 18 for eaves and no more than 8 for rakes.

But are they really necessary. An eave is the edge of the roof that overhangs the face of a wall and normally projects beyond the side of a building. The edge of the shingles should hang over a roof between an inch and an inch and a half or between a half inch and three quarters of an inch if drip edge flashing is installed. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.

Overhangs are extensions of the roof beyond the exterior wall i e the joists. This will protect a roof from most types of damage. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.