How Far Should Roof To Wall Flashing Overhang The Eaves

Overhangs are extensions of the roof beyond the exterior wall i e the joists.

How far should roof to wall flashing overhang the eaves.

That said overhangs can extend as far as 2 without the need for 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. This will protect a roof from most types of damage. A typical metal roof overhang may be 2 to 4 inches or even less.

Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. An eave typically has a metal edge flashing and gutter that are attached to a wood fascia trim board. Usually you won t see much of drip edge as it s under the roof shingles under the underlayment and behind the roof gutter. Eaves form the overhang to distribute water clear of the walls.

Eaves are located at the down slope edge of a sloped roof and serve as the transition between the roof and fascia wall. Too little can allow water to seep into rake or fascia boards. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. This can make extensive roof overhangs more trouble than they are worth in all but the harshest climates.

Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports. Lengths of drip vary but typically it s sold in ten foot lengths 120. Roof overhangs at the eaves and rakes protect the walls below from rain and sun. However the suggested width of an overhang is between 12 and 18 for eaves and no more than 8 for rakes.

The sketch above illustrates the end profile of roof drip edge flashing and shows its placement on the roof. 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. They also help to frame windows on upper stories. 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. 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. Too much overhang and the shingles could blow off in high winds.