Roof Slope Gutter Clearance

The general rule is to slope the gutters at 1 4 th inch per 10 feet of gutters.

Roof slope gutter clearance.

Roof pitch roof pitch factor. If the run is long you may need flashing to cover the exposed part of the facia. 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. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.

There is no building code citation that forbids a gutter from draining onto a lower roof. And for a 12 in 12 pitch 1 4 in. 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. 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.

For a gently sloped 5 in 12 pitch place the front lip of the gutter 3 4 in. Below the projected roof plane. Slope the gutter down form there towards the spout. For a steeper 7 in 12 pitch 1 2 in.

Water will blow in there and rot the timber facia. If the slope is slanted too sharply the gutters can t function at full capacity. If the gutter slope isn t properly positioned it will pool in the system and spill over the sides. The angle of a roof on a house is referred to as the roof pitch.

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. The numbers indicate the rise of the roof over it s run. 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. Weather bureau records the maximum rainfall that could possibly happen in a 5 minute period in inches per hour for various regions.

Roof pitch is very important for right roof gutter sizing. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. You can measure pitch with a 2 foot level and a tape measure. For a 1 12 roof for every 1 foot it rises vertically it runs 12 feet horizontally.

Not only do your gutters need sloped at a precise angle but the downspouts need specific direction as well. So it s a matter of what the home inspector or contractor considers acceptable. 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. It depends on who you ask this question.