Rain Off A Roof

To find how much rain you can collect in an average rain year multiply this number by the average inches of rain.

Rain off a roof.

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. Place a piece of standard metal drip edge onto a table or between a pair of sawhorses. 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. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall.

1 of rain on 1 000 sf roof will yield 623 gallons. Multiply the area of your roof by the amount of rainfall you wish to calculate for. For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain. Roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember.

For example if you have a roof that measures 1 500 square feet that equals 216 000 square inches. Rain falls upon a tin roof creating a soothing rainstorm white noise that is perfect for helping you sleep study focus or relax. 1 500 x 144 216 000 multiply those 216 000 square inches by the rainfall. Turn it upside down so the.

If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year. 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. 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. Oct 7 2018 explore joyce weber s board water runoff ideas on pinterest.

Roof area m2 x precipitation amount mm amount collected liters. The number of feet multiplied by 144 equals inches. Paint the drip edge. This is done to give the paint a better surface to adhere.

Block out distractions to. 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. The drainage system of any roof can be located at the edge or in the middle of the roof. Take the dimensions of the footprint of your roof and convert them to inches.

Rainwater collection calculation formulas and equations.