How Much Should A Roof Overhang A Gutter

A typical metal roof overhang may be 2 to 4 inches or even less.

How much should a roof overhang a gutter.

Shingle manufacturers say to use a 1 4 to 3 8 inch shingle overhang over the eave where your roof ends. A shed overhang is an easy and effective way to protect your shed. About 1 inch just enough to assure the water goes into the gutter and not behind it. You can add 3 to 5 inches to the top.

This will keep rain away from your shed. The brackets typically hold the gutter about 1 2 1 inch away from the fascia board if u type brackets otherwise if screw through type the gutter might be almost up to the fascia board. To create a cantilever properly you will need to know plenty about physics like torque and rotational equilibrium. Each has their own reasoning for a slightly different amount of overhang.

We ve seen other references that suggest extending the shingles a bit more than the manufacturers suggest to compensate for wavy eaves but they do not indicate extending more than 1 inch over the eave. The reason for this is that whenever rain runs down any type of roof when it gets to the lower edge it clings to the tile or slate by capilliary action this means that the water actually runs around the bottom edge and slightlly back up the rear of the tile before gravity allows it to drop into the gutter. Unless the roof edge is quite uneven some shingles overhang significantly more than others it should have the same stickout all along. 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.

Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. The bottom tile or slate of the roof covering should project at least half way into the gutter the ideal distance is between half way and two thirds of the way over. Here phil explains how much overhang a roof should have at the gutter. Too little can allow water to seep into rake or fascia boards.

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.