For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain.
Rain water collected under house from the roof water celler.
Traditionally this involves harvesting the rain from a roof.
Apart from rain sources of water leaks include roof spillage surface runoff improper exterior foundation drains and clogged gutters and downspouts.
To collect rainwater you can attach a rain barrel to your home s downspout so when it rains the water flows directly into the barrel.
Water leakage in basement walls is an example of this.
Just lay the tarp out on an elevated area and run a drainpipe from the lowest corner to a collection tank.
How to stop water from leaking into basement.
If you want to collect rainwater without a roof or downspout you can use a tarp instead.
The average residential rain barrel holds 50 gallons of water.
A diverter can be added to the downspout to direct the water flow into the rain barrel or away from the building in the normal discharge.
Downspouts channel the collected water from the roof to the ground at the corners of the house and other locations.
Otherwise the downspouts deposit the collected rainwater at your home s foundation.
Rainwater harvesting is collecting the run off from a structure or other impervious surface in order to store it for later use.
To find how much rain you can collect in an average rain year multiply this number by the average inches of rain.
This calculation assumes a 90 efficiency.
A qualified contractor will help you learn how to tell if the foundation is bad and needs repair.