How To Measuring Tape Gutter Slope

For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.

How to measuring tape gutter slope.

This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. There s no hard rule on the angle of the slope. Add 1 2 inch or 1 inch to this measurement depending on gutter length and mark the fascia. Take the same measurement at the opposite end near the downspout.

Carefully climb down the ladder and move it to the chalk mark. Make a mark with chalk and record the measurement. This second mark should be at least half an inch higher than the first one. Use your tape measure to determine the length of the twine marking down this calculation.

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. Mark the measurement with a piece of tape and then pull the twine off of the other end of the gutter. The steeper a roof s pitch the more windblown rain it can collect.

Measure length of twine. 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. Masters in the art of constructing contained french drain systems. You can measure pitch with a 2 foot level and a tape measure.

Run the tape measure from 1 corner of the gutter as far as you can go toward the opposite corner. 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. You can move along the roof bringing the twine to the other end of the gutter run. Mark the measurement on the fascia board.

It should pitch from the middle toward the downspouts at each end. Otherwise it s a sign that your rain gutter slope isn t sufficient and needs adjustment. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering.