The main purpose:
- ensure the small area of concrete that was below ground level wouldn’t flood
- use as few new materials as possible
- minimise the cost
- use the principles of natural drainage – no need for pipes to take away water
We used reclaimed concrete drainage, used car tyres, and reclaimed bathroom wall panels to create a barrier between the surrounding soil and the stones that were to be used to create easy drainage for any excess surface water. Also used rubble from a wall we demolished.
The only new materials we used were 6 tonnes of stone (not added when these photos were taken) from a local river bed. Total cost: about $200 and a sore back.