How Much Overhang To Not Need A Gutter For Roof

Improperly installed gutters may splash these boards during rainstorms causing them to rot.

How much overhang to not need a gutter for roof.

Many installers deliberately bend down the overhang into the gutter to assure no wind blown rain goes between the overhang and the gutter effectively preventing water incursion behind the gutter. 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. In our local area metro jackson ms the typical overhang is about 12.

The edge of the shingles should hang over the edge of the 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 and in most cases it should be. These boards are one by six inches and support the roof s overhang. A typical metal roof overhang may be 2 to 4 inches or even less. 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.

When a roofer advises against installing a gutter you should ask for specific reasons. About 1 inch just enough to assure the water goes into the gutter and not behind it. Without gutters water cascading over the roof s edge can wash down the side of your home especially in a windy rain event. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.

Steep roofs allow rain and snow to slide right off very easily and if your overhang extends more than a foot past the side of your home you re unlikely to experience much damage from the displaced rainwater except maybe to your landscaping. Greater overhang becomes a point of leverage for gusts of wind to rip off your roofing. Knowledgeable roofers will install shingles at just the right overhang for your roof type. Windows doors and siding will be coated with rain water and that can increase the opportunity for leaks.