How Many Inches Should My Gutter Be Past The Roof

Here phil explains how much overhang a roof should have at the gutter.

How many inches should my gutter be past the roof.

That is how much rain a roof can drain during the most intense rainfall. For half rounds 5 inch should be used for up to 2500 sq feet and 6 inch for up to 3 840 sq ft. 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. 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.

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. For a 5 inch k style gutter the square footage should be up to 5 500 sq ft and for a 6 inch k style gutter the square footage should be upto 7 900 sq ft. One foot of 6 k style gutters holds 2 0 gallons of water. It s not uncommon for homeowners to hang the gutters so that the front edge is slumping forward too much.

3 5 centimeters is in the 2 3 inch range. After you have calculated the square footage use following calculations. Gutters or 7 960 square feet. Therefore this roof should be equipped with 6 inch k style gutters.

That said gutters need to be completely level from front to back or water could spill over either edge. That will show how much water a gutter will have to drain. Multiplying that number by the local maximum rainfall intensity 6 8 inches per hour yields an adjusted square footage of 7 480 square feet. Divide the inch per hour watershed of the roof by the 5 minute rainfall intensity.

Here phil explains how much overhang a roof should have at the gutter. Any more and you run the risk of water running off the tile and overshooting the gutter. Of 6 inches would mean the roof has a 6 in 12 inch pitch. One foot of 5 k style gutters holds 1 2 gallons of water.

Measure the length of the gutter for downspout locations. Ask gutter suppliers what size gutters will be needed to handle that amount.