Rainwater Collection From Roof

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Rainwater collection from roof.

In 2016 house bill 16 1005 was passed allowing residents to collect rainwater from a catchment system on their rooftops into two rain barrels with a combined capacity of 110 gallons. 1 of rain on 1 000 sf roof will yield 623 gallons. Did you know the average roof collects 600 gallons 2 271 2 l of water for every inch of rainfall. Doesn t that sound like a lot of water that you could harvest and use for free.

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. Rainwater runoff from your roof contains a mix of materials deposited by pollution and animals as well as chemicals used in the manufacture of the shingles. The collected rain must be used on the property where it is collected and may only be used for outdoor purposes such as lawn irrigation and gardening.

Don t let all that water go to waste. Traditionally this involves harvesting the rain from a roof. Roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember. Now 104 years later i am thankful the authors had the foresight to preserve their knowledge for us and pointed out that rainwater collected in barrels from a roof is a necessity in some locations but also is best for laundry and often more wholesome for drinking purposes than hard water.

You can make a rainwater collection system for under a hundred dollars and store hundreds of gallons of water to use for your garden or other purposes. Rainwater collection calculation formulas and equations. The water is collected in the gutters moves through the downspouting and then finally collects in some sort of storage container. Two laws were passed in 2009 which loosened restrictions on rainwater collection allowing residents to use rainwater for non potable purposes.

Typically a roof acts as the main collection source. Roof area m2 x precipitation amount mm amount collected liters. Adding chlorine or iodine to water does not protect against chemicals and some parasites are very chlorine tolerant. Around 600 gallons of rainwater can be harvested from about one inch of rain if it falls from a thousand square foot roof.

That is why my husband and i began harvesting our rainwater. If you re installing a new roof for the purpose of collecting rainwater standing seam metal may very well be your best choice. Rainwater harvesting is the process of collecting run off rainwater from a building in order to store it for later use. Rain barrels for example do not provide any type of disinfection or filtration.