Correct Gutter Slope

Next place a ladder at the left side of the house and measure from the roof down to the gutter.

Correct gutter slope.

Or you can slope the gutters down from each end toward a single downspout placed in the middle of the run. 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. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. Roof gutters need to be pitched toward the downpipes for the water to flow properly.

There are two factors that go into determining gutter position on the eave the pitch of the gutter and the roof slope. 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. Gutter should be pitched 1 16 or greater per foot for proper drainage. For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end.

For gutter runs longer than 40 feet it s best to pitch the gutter down from the middle to a downspout at each end. When you look at a rain gutter system from the ground it looks like it was parallel to the roofline of the house but they are slightly inclined so rainwater can flow straight to the downspout without problems. To ensure that gutters drain properly make certain they slope inch for every 10 feet toward a downspout. Roofing and guttering experts recommend that gutters have at least a quarter inch of slope per 10 feet to avoid standing water on your roof gutters.

Gutters need to be pitched toward the downspouts for the water to flow properly. Gutter can be run level for appearance but addition downspout will be necessary see section on proper gutter and downspout sizing. This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout. You want at least a quarter inch of slope for every 10 feet.

Get on a ladder after a rainstorm and look in the gutter. So what s the ideal amount of slope for your gutters. Slope calculation this is a critical aspect in any rain gutter installation. Multiply the number of feet by 1 16 inch to determine the total slope the gutter requires.

Most contractors tend to set the slop at one quarter inch per ten feet of guttering. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. To correct this yourself you ll need to measure from the peak to the downspout.