Box Gutter Pitch

If you don t have a garden hose you can test the pitch using a bucket of water.

Box gutter pitch.

Simplified suitable for flattish roofs with little or no vertical faces or steep roofs draining to one side of box gutter only or any roof if you are in a hurry and make the necessary allowances for all catchments. The gutter slope also called the pitch is the amount the gutter tilts down to let rainwater flow out of it. They should not be confused with so called valley gutters or valley flashings which occur at the non parallel intersection of roof surfaces typically at right angled internal corners of pitched roofs. If your gutters don t slope then you only need to adjust the hangers and lower them slightly where necessary to achieve the correct slope.

Section from the box miter with a tin snips and you ve got yourself a custom slip joint. Measure from the roof edge at both ends of the gutter if you want to be sure. A good guideline is that the pitch should cause a decrease somewhere between 1 to 2 inches over a 40 foot run. Design of roof drainage systems.

Because these gutters are not formed from a coil trough a machine they run in 10 lengths. If gutters slope too severely they don t hold water and water could splash over the sides in heavy rain. Test the pitch of your reinstalled gutter by turning on a garden hose and directing the water into the farthest part of the gutter from the downspout. Watch the water to ensure it begins to flows down toward the downspout.

The downspout size must suit the bottom width of the gutter. Every box gutter is made custom to order with a standard or custom profile. If the gutter slope isn t properly positioned it will pool in the system and spill over the sides. If gutters don t slope water gathers in them.

Box gutters are essentially placed between parallel surfaces as in a valley between parallel roofs or at the junction of a roof and a parapet wall. Provision is made in the design of the gutter to have a rain flow to the outlet with a maximum slope of 1 200 and a minimum of 1 400. Box gutter with rain water head at end of box gutter. Mm mm level to 3 76 305 1 00 4 to 5 102 127 305 1 05 6 to 8 152 203 305 1 10 9 to 11 229 279 305 1 20.

These gutters can be made to accommodate regulark style hangers. The amount of collected water increases until it spills over the sides of the gutter. Box gutters are beautifully designed to fit both the commercial and residential industry. A steeper pitch will make water run down faster and require an oversized gutter.

When you buy your new gutter section make sure you order either an inside or outside box miter at the same time. The gutter outlet capacity should suit the downspout capacity. If the slope is slanted too sharply the gutters can t function at full capacity. Although size of your roof is important you should also consider the pitch of your roof.