Minimum Gutter Pitch

Secure it with eight pop rivets or sheet metal screws.

Minimum gutter pitch.

From the table above a gutter with diameter 100 mm 4 inches can be used. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. So if you have a 25 foot section of guttering you should set the downspout end of the gutter 5 8 of an inch lower 1 4 x 2 5 5 8 than the other end. Working out gutter slope as a general rule gutter slope is set at 1 4 inch per 10 feet of guttering.

This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout. However you can only use this pitch with built up roofing or specialized synthetic roofing. Gutters should slope an inch or two for every 40 feet. Place the line spirit level on the string.

Most contractors tend to set the slop at one quarter inch per ten feet of guttering. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. Form strip miter joint at corner cover the joint between two lengths of gutter at each corner with a strip miter a 3 inch wide strip of aluminum. For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. A roof with area 45 m2 can be drained with a gutter with slope 1. Even though they look level from a distance gutters should be pitched slightly from one end to the other. Sorry to see that you are blocking ads on the engineering toolbox.

This brings up another important rule to keep in mind. For spans longer than 40 feet it s wise to have a downspout on each end and start the high spot of the gutter in the center. The standard slope for rain gutters is half of an inch for every 10 feet. Multiply the number of feet by 1 16 inch to determine the total slope the gutter requires.

If the pitch is too gentle water will just fill up in the gutters until it overflows and a too sharp pitch isn t aesthetically pleasing. All guttering must slope toward the nearest downspout. Next place a ladder at the left side of the house and measure from the roof down to the gutter. Use the bubble on the line level to make sure the line is level the length of the gutter area.

Cut a triangular section from. The downspout can be 75 mm.