How much water can I harvest from the roof of a four-bedroom house and how easily can this be done?
Answer: Under normal rains for just one hour, a four-bedroom house can generate as much as 500 litres of harvestable water. These are 25 jerrycans of water.
To trap this water, you need to erect gutters around the roof of the house and then direct them to a water tank. The tank may be made of plastic, metal or even concrete.
To set up the entire rain collection system, perhaps the most expensive item is the water tank or reservoir.
A 1,000-litre tank costs about sh200,000. The bigger it is, the more expensive it is.