How Far Should On Overhang Go On Roof

Here phil explains how much overhang a roof should have at the gutter.

How far should on overhang go on roof.

Too much overhang and the shingles could blow off in high winds. A shed overhang is an easy and effective way to protect your shed. This will keep rain away from your shed. 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.

An overhang must extend at least 3 4 in 1 9 cm past a roof s edge to reach the gutter. If you have gutters but still suffer from water rolling down the sides of your home it s likely that your overhang isn t long enough. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. Too little can allow water to seep into rake or fascia boards.

This will protect a roof from most types of damage. However the suggested width of an overhang is between 12 and 18 for eaves and no more than 8 for rakes. A typical metal roof overhang may be 2 to 4 inches or even less. Drip edge varies in dimensions but typically the flange that nails to the roof surface is about 2 5 wide and the vertical edge that directs roof runoff down and away is about 1 5 in depth.

To create a cantilever properly you will need to know plenty about physics like torque and rotational equilibrium. Two feet is the general maximum length for a typical roof overhang. Lengths of drip vary but typically it s sold in ten foot lengths 120. This indicates the upper edge of the first row of roof sheathing leaving enough overhang that the subfascia and fascia will tuck neatly underneath when the time comes.

Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports. Flashing is a solid solution. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. Here phil explains how much overhang a roof should have at the gutter.

That said overhangs can extend as far as 2 without the need for external supports.