How Far Should Roof To Wall Flashing Overhange The Eaves

Usually you won t see much of drip edge as it s under the roof shingles under the underlayment and behind the roof gutter.

How far should roof to wall flashing overhange the eaves. But the same overhang will not shade the entire window when the sun is lower second image. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. Too much overhang and the shingles could blow off in high winds. Only a 3 feet 1 meter overhang third image provides enough shade to protect the entire window for that position of the sun.

Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports. The roof overhang does not extend far enough. Lengths of drip vary but typically it s sold in ten foot lengths 120. Too little can allow water to seep into rake or fascia boards.

That said overhangs can extend as far as 2 without the need for external supports. Overhangs are extensions of the roof beyond the exterior wall i e the joists. This leads to a situation where there is an excess amount of shade and the exterior of the home appears dark and gloomy. A typical metal roof overhang may be 2 to 4 inches or even less.

When the sun is higher in the sky first image a 2 feet 60 cm overhang is long enough to shade the entire wall. The sketch above illustrates the end profile of roof drip edge flashing and shows its placement on the roof. Overhangs can vary from a few inches to a few feet depending on preference. This will protect a roof from most types of damage.

An eave typically has a metal edge flashing and gutter that are attached to a wood fascia trim board. 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. A related problem is that the roof is actually at greater risk of wind damage. Two feet is the general maximum length for a typical roof overhang.

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. Roof overhangs at the eaves and rakes protect the walls below from rain and sun. 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.