Gutter Slope Per Foot

As with gutters a downspout s capacity must match or exceed the expected runoff.

Gutter slope per foot. I live in climate zone 4a in virginia. Modern roofing care and repair creative homeowner press. The above recommendations assume that you have properly sized downspouts every 40 feet. 1 sq in downspout cross section per 100 sq ft of roof drained.

Gutter should be pitched 1 16 or greater per foot for proper drainage. I m reading a lot of different recommendations for the pitch slope of gutters on fascia anywhere from 1 8 per foot to 1 4 per 10 feet or to completely level. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. So what s the ideal amount of slope for your gutters.

There are two factors that go into determining gutter position on the eave the pitch of the gutter and the roof slope. Most contractors tend to set the slop at one quarter inch per ten feet of guttering. Gutter can be run level for appearance but addition downspout will be necessary see section on proper gutter and downspout sizing. 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 is about inch per 10 feet. Slope 1 8 inch per running foot. 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. To ensure that gutters drain properly make certain they slope inch for every 10 feet toward a downspout.

Rules of thumb for gutters. Ranch house with roof of 5 12 pitch 48 feet long with a small gable extending out over a porch at one end. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. At the ends of the gutters are 4 inch diameter corrugated aluminum downspouts 1 75 per linear foot which were ordered in white to match the house trim.

Increasing the pitch increases a gutter s handling capacity but the gutter may look askew over a long run. For rainy climates where gutters will handle a larger amount of water for long periods they should have a maximum distance of 18 inches apart between them. This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.

The standard slope for rain gutters is half of an inch for every 10 feet. Max run per downspout of 40 feet.