To use this calculator input the dimensions of your roof only area connected to rainwater harvesting system and the amount of rainfall in inches.
Roof rainwater collection system.
The good news is most roofing materials are suitable for rainwater harvesting.
1 of rain on 1 000 sf roof will yield 623 gallons roof area m2 x precipitation amount mm amount collected liters.
While metal roofing or plastic sheeting e g.
Figure out what you already have on hand then gather the following supplies.
Pipe threads so you can access water from your rain barrel.
Earthminded diy rain barrel diverter and parts kit water collection system to convert containers into rain barrels catch rain water for outdoor chores rbk 0001 4 6 out of 5 stars 644 31 98 31.
There s just a short list of rooftop surfaces that rainwater harvesters should avoid.
Here s a handy little calculator to help you estimate how much rainwater can you harvest from your roof.
A step beyond screens is to add a first flush diverter aka roof washer to your rainwater collection system.
1 standard 1 inch hose spigot with in.
Greenhouse roof has the highest collection efficiency most surfaces are a ok.
The supplies you ll need to make your rainwater collection system can easily be picked up at a hardware or home and garden store.
How much rainwater can you harvest from your roof.