The cubby house is to be partially underground. and the fire put is to be sunken (around 450-500mm). The top of the cubby house will be around 0.9-1m and be a viewing platform/stage for Louka. The bottom bit will be the actual cubby house.
The first step is to remove the builder's toilet - done.
Second is to build what is called a diaphragm wall by the fence. I excavated a trench 100mm x 1400mm below the fence and filled it full of concrete and reo N12 @ 350mm . Being mostly sand, it was easy for the first metre. Then it was hard sandy clay. The idea behind a diaphragm wall is to enable "bulk excavation" without impacting the park. This wall is approximately half the final width of the wall.
