Roof Slope Gutter Clearance

For a steeper 7 in 12 pitch 1 2 in.

Roof slope gutter clearance.

For a gently sloped 5 in 12 pitch place the front lip of the gutter 3 4 in. And for a 12 in 12 pitch 1 4 in. Weather bureau records the maximum rainfall that could possibly happen in a 5 minute period in inches per hour for various regions. It depends on who you ask this question.

Slope the gutter down form there towards the spout. Roof pitch is very important for right roof gutter sizing. If the slope is slanted too sharply the gutters can t function at full capacity. There is no building code citation that forbids a gutter from draining onto a lower roof.

Roof pitch roof pitch factor. Required clearance of gutter below extended roof line roof pitch clearance below extended roof line 0 in 12 2 in 12 1 3 in 12 5 in 12 6 in 12 8 in 12 9 in 12 or greater. So it s a matter of what the home inspector or contractor considers acceptable. Start at the highest point with the back of the gutter as high as it will go up against the bottom of the slate or tile or galvanised iron roof.

The general rule is to slope the gutters at 1 4 th inch per 10 feet of gutters. Below the projected roof plane. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. Hold one end of the level against the roof level it and then measure the distance between the roof and the underside of the level at its midpoint which gives you a 12 inch run.

Generally a contractor that drains a gutter onto a lower roof will say that it is an industry standard whereas a contractor that rants against it will say that it s not best building practice. The angle of a roof on a house is referred to as the roof pitch. The numbers indicate the rise of the roof over it s run. It s usually expressed as a number that looks like a fraction such as 1 12 for a very shallow roof or 18 12 for one that s very steep.

As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. Water will blow in there and rot the timber facia. If the gutter slope isn t properly positioned it will pool in the system and spill over the sides. Not only do your gutters need sloped at a precise angle but the downspouts need specific direction as well.

You can measure pitch with a 2 foot level and a tape measure. If the run is long you may need flashing to cover the exposed part of the facia. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. 12 in 12 or higher 1 3 9 in 12 to 11 in 12 1 2 6 in 12 to 8 in 12 1 1 4 in 12 to 5 in 12 1 05 flat to 3 in 12 1.