Sloping Roof Gutters

But in reality they must be sloped ever so slightly so the runoff water can flow downhill to the downspouts.

Sloping roof gutters. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. You want at least a quarter inch of slope for every 10 feet. From a distance gutters appear to parallel the roofline. This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout.

Gutters need to be pitched toward the downspouts for the water to flow properly. No matter your roofing system you ll need a system of roof gutters to help rain to drain away from your building. The standard slope for rain gutters is half of an inch for every 10 feet. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.

This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. 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. Secure it with eight pop rivets or sheet metal screws. If there s standing water it s not pitched properly.

Wrap the aluminum strip tight around the underside of the gutter. 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. To correct this yourself you ll need to measure from the peak to the downspout. Get on a ladder after a rainstorm and look in the gutter.