Rainwater Collection Off Roof

New information is available about rainwater harvesting from composition roofs.

Rainwater collection off roof.

Just a half inch of rain falling on a 1 000 square foot roof will yield 300 gallons of water. What is rainwater collection. Typically a roof acts as the main collection source. 1 of rain on 1 000 sf roof will yield 623 gallons.

Roof area m2 x precipitation amount mm amount collected liters. Rain barrels for example do not provide any type of disinfection or filtration. Rain barrel supplies list. Rainwater collection in off grid systems is one way to feed your supply.

The water is collected in the gutters moves through the downspouting and then finally collects in some sort of storage container. And this is when it is operating at its least efficient rate of purification at 32 degrees f. That is why my husband and i began harvesting our rainwater. Traditionally this involves harvesting the rain from a roof.

When you look at the numbers it s surprising how much water you can collect every time it rains. Today houses are built with roof gardens that naturally absorb the rain and grow an insulating layer of grass. Dirt and germs can be washed into collected rainwater from the roof especially when rain follows several days of dry weather 3 4 9. Doesn t that sound like a lot of water that you could harvest and use for free.

Well we thought so too. Rainwater collection calculation formulas and equations. A high quality enameled roofing material that is easy to clean standing seam metal offers the highest collection efficiency available. 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. It can also allow you to keep your expenses down and even reduce your carbon footprint. If you re installing a new roof for the purpose of collecting rainwater standing seam metal may very well be your best choice. Collecting rainwater is a technique that has been practiced for centuries as an environmentally friendly method to collect rain for distribution in gardens and across landscaping.

To get an idea how much water the roof of your own house might yield use the rainfall harvest calculator above.