Rain Off A Roof

If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year.

Rain off a roof.

Score the surface of the drip edge with 80 grit sandpaper. To find how much rain you can collect in an average rain year multiply this number by the average inches of rain. Rain falls upon a tin roof creating a soothing rainstorm white noise that is perfect for helping you sleep study focus or relax. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall.

A common slope used that covers most materials is 2 12 which means that for every foot the roof steps up or down 2 inches. Multiply the area of your roof by the amount of rainfall you wish to calculate for. Block out distractions to. Roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember.

If you get about 10 inches of rain over the course of the spring and summer an average 1 360 square foot roof would yield 8 160 gallons of rainwater. Turn it upside down so the. Take the dimensions of the footprint of your roof and convert them to inches. Oct 7 2018 explore joyce weber s board water runoff ideas on pinterest.

Rainwater collection calculation formulas and equations. The drainage system of any roof can be located at the edge or in the middle of the roof. Place a piece of standard metal drip edge onto a table or between a pair of sawhorses. For example if you have a roof that measures 1 500 square feet that equals 216 000 square inches.

In this example 600 x 240 x 1 144 000 cubic inches of water divide by 231 to get the number of gallons because 1 gallon 231 cubic inches. This is done to give the paint a better surface to adhere. You have to admit that whether you re in a drought situation or not it s hard to pass up that much of a free thing. How to redirect rain off a roof 1.

The number of feet multiplied by 144 equals inches. See more ideas about outdoor gardens backyard front yard. Designing a flat roof for runoff how water runs off a roof depends on the amount of rainfall and how quickly it needs to drain. Paint the drip edge.

1 of rain on 1 000 sf roof will yield 623 gallons.