How To Measuring Tape Gutter Slope

Otherwise it s a sign that your rain gutter slope isn t sufficient and needs adjustment.

How to measuring tape gutter slope. 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. Measure from the roof edge at both ends of the gutter if you want to be sure. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. Mark the measurement with a piece of tape and then pull the twine off of the other end of the gutter.

This second mark should be at least half an inch higher than the first one. Add 1 2 inch or 1 inch to this measurement depending on gutter length and mark the fascia. 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. Take the same measurement at the opposite end near the downspout.

Mark the measurement on the fascia board. You can move along the roof bringing the twine to the other end of the gutter run. Measure the length of each gutter run. Measure length of twine.

It should pitch from the middle toward the downspouts at each end. As long as there is enough slope the water will naturally run out. The steeper a roof s pitch the more windblown rain it can collect. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.

Use your tape measure to determine the length of the twine marking down this calculation. There s no hard rule on the angle of the slope. Make a mark with chalk and record the measurement. Masters in the art of constructing contained french drain systems.

As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. You can measure pitch with a 2 foot level and a tape measure. Carefully climb down the ladder and move it to the chalk mark.