Rain Water Collection On Roof

Rainwater can be collected from the roofs using the rain water harvesting method.

Rain water collection on roof. Roofing materials gutters piping and storage materials can introduce harmful chemicals like asbestos lead and copper to the water though building standards minimize some of this 6 8. Doesn t that sound like a lot of water that you could harvest and use for free. 1 of rain on 1 000 sf roof will yield 623 gallons roof area m2 x precipitation amount mm amount collected liters. Dirt and germs can be washed into collected rainwater from the roof especially when rain follows several days of dry weather 3 4 9.

A high quality enameled roofing material that is easy to clean standing seam metal offers the highest collection efficiency available. Typically a roof acts as the main collection source. If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year. To find how much rain you can collect in an average rain year multiply this number by the average inches of rain.

Collecting the rainwater that runs off your roof is a great way to conserve an important natural resource. Around 600 gallons of rainwater can be harvested from about one inch of rain if it falls from a thousand square foot roof. Rainwater harvesting is collecting the run off from a structure or other impervious surface in order to store it for later use. Rainwater can be stored in rain barrels for later use or moved directly into cisterns so it can be used right away.

If you re installing a new roof for the purpose of collecting rainwater standing seam metal may very well be your best choice. Water is often in short supply in the heat of summer so it s tempting to use roof runoff. The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area. Rainwater collection calculation formulas and equations roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember.

The rain will collect in gutters that channel the water into downspouts and then into some sort of storage vessel. Well we thought so too. That is why my husband and i began harvesting our rainwater. It s been believed that the collection of rainwater would halt the rainfall s natural flow into the earth s aquifers and streams.

For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain. Traditionally this involves harvesting the rain from a roof.