How To Figiure Gutter Slope

Next place a ladder at the left side of the house and measure from the roof down to the gutter.

How to figiure gutter slope.

For those you will need to add up the area of each surface within a drainage area to get the total square footage. Place the line spirit level on the string. Then fasten one end of the string at the highest point of the gutter and the other at the spot where the downspout will be. For gutter runs longer than 40 feet it s best to pitch the gutter down from the middle to a downspout at each end.

First you ll need to calculate the square footage of the gutter s drainage area. To ensure that gutters drain properly make certain they slope inch for every 10 feet toward a downspout. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. Use the bubble on the line level to make sure the line is level the length of the gutter area.

Therefore this roof should be equipped with 6 inch k style gutters. Determine the longitudinal slope transverse slope and manning s roughness coefficient of the gutter. For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end. First determine the location of each one of your downspouts.

The best way to calculate the slope of a gutter run before hanging it is to use a long string and a string level. For a constant transverse slope compute the ponded depth using equation 10 1 and the ponded width using equation 10 2. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. Compute the ponded depth and width.

Or you can slope the gutters down from each end toward a single downspout placed in the middle of the run. Hip roofs and intersecting roofs have multiple facets. Multiply the number of feet by 1 16 inch to determine the total slope the gutter requires. How to determine gutter slope.

The 6 in 12 pitch factor 1 1 multiplied by 1 000 yields an effective area of 1 100 square feet.