Rainwater collection using rain barrels is relatively cheap and efficient: If your roof has gutters, you should be able to harvest over 500 gallons for every 1,000 square feet of roof with just 1 ...
“On a 1,000 square foot roof just an inch of rain would capture ... When it comes to rainwater collection, a little goes a long way. Until the rain comes back another day. Toth said you can ...