We spent the whole day setting out levels using pieces of wood ready for the chape tomorrow. The technique we used was to lay a bed of mortar on the concrete floor then place a long length on top of the bed such that the top of the wood is the intended floor level. The thickness of the chape was about 6cm.

The photo shows a small section of the mortar bed with the wood removed. Once the wood is placed on top, the chape is barrowed into the space and then levelled with a straight edge. The white stuff round the edge of the room is a polystryrene barrier for expansion and damp insulation.