Roof Slope Gutter Clearance

The steeper a roof s pitch the more windblown rain it can collect.

Roof slope gutter clearance.

And for a 12 in 12 pitch 1 4 in. The numbers indicate the rise of the roof over it s run. There is no building code citation that forbids a gutter from draining onto a lower roof. The general rule is to slope the gutters at 1 4 th inch per 10 feet of gutters.

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. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. It depends on who you ask this question. For a gently sloped 5 in 12 pitch place the front lip of the gutter 3 4 in.

Slope the gutter down form there towards the spout. 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. You can measure pitch with a 2 foot level and a tape measure. Below the projected roof plane.

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. 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. Not only do your gutters need sloped at a precise angle but the downspouts need specific direction as well. If the gutter slope isn t properly positioned it will pool in the system and spill over the sides.

Weather bureau records the maximum rainfall that could possibly happen in a 5 minute period in inches per hour for various regions. For a 1 12 roof for every 1 foot it rises vertically it runs 12 feet horizontally. If the run is long you may need flashing to cover the exposed part of the facia. The angle of a roof on a house is referred to as the roof pitch.

This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. Roof pitch is very important for right roof gutter sizing. 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. For a steeper 7 in 12 pitch 1 2 in.

Water will blow in there and rot the timber facia. So it s a matter of what the home inspector or contractor considers acceptable. The distance below the projected roof plane varies with pitch. If the slope is slanted too sharply the gutters can t function at full capacity.