How To Measuring Tape Gutter Slope

You can measure pitch with a 2 foot level and a tape measure.

How to measuring tape gutter slope.

Carefully climb down the ladder and move it to the chalk mark. Measure from the roof edge at both ends of the gutter if you want to be sure. You can move along the roof bringing the twine to the other end of the gutter run. Use your tape measure to determine the length of the twine marking down this calculation.

Measure length of twine. Masters in the art of constructing contained french drain systems. Run the tape measure from 1 corner of the gutter as far as you can go toward the opposite corner. Take the same measurement at the opposite end near the downspout.

This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. Start on the end of the gutter farthest from the downspout and measure the space from the roof edge to the top of the gutter. The steeper a roof s pitch the more windblown rain it can collect. This second mark should be at least half an inch higher than the first one.

As long as there is enough slope the water will naturally run out. Mark the measurement on the fascia board. Use a tape measure to mark a second spot 10 feet closer to your downspout checking that the line between the two marks is level as you go. Hold one end of the level against the roof level it and then measure the distance between the roof and the underside of the level at its midpoint which gives you a 12 inch run.

There s no hard rule on the angle of the slope. A good guideline is that the pitch should cause a decrease somewhere between 1 to 2 inches over a 40 foot run. Add 1 2 inch or 1 inch to this measurement depending on gutter length and mark the fascia. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering.

Measure the length of each gutter run. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. Otherwise it s a sign that your rain gutter slope isn t sufficient and needs adjustment.