How Many Inches Should My Gutter Be Past The Roof

Divide the inch per hour watershed of the roof by the 5 minute rainfall intensity.

How many inches should my gutter be past the roof.

3 5 centimeters is in the 2 3 inch range. Gutters or 7 960 square feet. That is how much rain a roof can drain during the most intense rainfall. Multiplying that number by the local maximum rainfall intensity 6 8 inches per hour yields an adjusted square footage of 7 480 square feet.

If you live in a warm place with sporadic rain you can hang gutter hangers close to the middle of the gutter with a spacing of no more than 36 inches or three feet apart from the center. One foot of 6 k style gutters holds 2 0 gallons of water. 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. One foot of 5 k style gutters holds 1 2 gallons of water.

Here phil explains how much overhang a roof should have at the gutter. Of 6 inches would mean the roof has a 6 in 12 inch pitch. Measure the length of the gutter for downspout locations. After you have calculated the square footage use following calculations.

The brackets typically hold the gutter about 1 2 1 inch away from the fascia board if u type brackets otherwise if screw through type the gutter might be almost up to the fascia board. The gap can vary some because the gutters must slope towards the downspout. Make sure the ladder extends at least three feet past its top resting point against the roof edge. For half rounds 5 inch should be used for up to 2500 sq feet and 6 inch for up to 3 840 sq ft.

Gutters should slope an inch or two for every 40 feet. Ask gutter suppliers what size gutters will be needed to handle that amount. That said gutters need to be completely level from front to back or water could spill over either edge. Any more and you run the risk of water running off the tile and overshooting the gutter.

Here phil explains how much overhang a roof should have at the gutter. Therefore this roof should be equipped with 6 inch k style gutters.