Roof Slope Gutter Clearance

For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.

Roof slope gutter clearance.

The angle of a roof on a house is referred to as the roof pitch. Not only do your gutters need sloped at a precise angle but the downspouts need specific direction as well. If the slope is slanted too sharply the gutters can t function at full capacity. So it s a matter of what the home inspector or contractor considers acceptable.

If the run is long you may need flashing to cover the exposed part of the facia. The distance below the projected roof plane varies with pitch. Water will blow in there and rot the timber facia. Slope the gutter down form there towards the spout.

For a 1 12 roof for every 1 foot it rises vertically it runs 12 feet horizontally. For a steeper 7 in 12 pitch 1 2 in. You can measure pitch with a 2 foot level and a tape measure. 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.

It depends on who you ask this question. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. 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. 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.

Below the projected roof plane. Roof pitch roof pitch factor. The numbers indicate the rise of the roof over it s run. The steeper a roof s pitch the more windblown rain it can collect.

The general rule is to slope the gutters at 1 4 th inch per 10 feet of gutters. 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. 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. 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. There is no building code citation that forbids a gutter from draining onto a lower roof. For a gently sloped 5 in 12 pitch place the front lip of the gutter 3 4 in.