Roof Rainwater Collection System

Rainwater collection calculation formulas and equations roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember.

Roof rainwater collection system.

A step beyond screens is to add a first flush diverter aka roof washer to your rainwater collection system. 1 of rain on 1 000 sf roof will yield 623 gallons roof area m2 x precipitation amount mm amount collected liters. There s just a short list of rooftop surfaces that rainwater harvesters should avoid. Pipe threads so you can access water from your rain barrel.

The good news is most roofing materials are suitable for rainwater harvesting. The supplies you ll need to make your rainwater collection system can easily be picked up at a hardware or home and garden store. 1 standard 1 inch hose spigot with in. While metal roofing or plastic sheeting e g.

How much rainwater can you harvest from your roof. 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. Here s a handy little calculator to help you estimate how much rainwater can you harvest from your roof.

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.