Roof Rainwater Collection System

While metal roofing or plastic sheeting e g.

Roof rainwater collection system.

Pipe threads so you can access water from your rain barrel. 1 of rain on 1 000 sf roof will yield 623 gallons roof area m2 x precipitation amount mm amount collected liters. A first flush diverter is a contraption that redirects the first purge of water coming from the roof during a storm away from the rainwater tank. Rainwater collection calculation formulas and equations roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember.

1 standard 1 inch hose spigot with in. The supplies you ll need to make your rainwater collection system can easily be picked up at a hardware or home and garden store. Here s a handy little calculator to help you estimate how much rainwater can you harvest from your roof. There s just a short list of rooftop surfaces that rainwater harvesters should avoid.

The good news is most roofing materials are suitable for rainwater harvesting. A step beyond screens is to add a first flush diverter aka roof washer to your rainwater collection system. Greenhouse roof has the highest collection efficiency most surfaces are a ok. Figure out what you already have on hand then gather the following supplies.

Read down the list for info on roofing materials for rainwater harvesting.