With the insulation covered by a water proof membrane and 50 cms of concrete the boys now had a firm base on which to work. They started by laying “Mars bars” (Spacers below the steel to allow the concrete to flow under the mesh). Then they placed “Armchairs” on the bottom layer of steel to support the top layer of steel with the correct spacing between the reinforcing sheets.
All of the steel reinforcing is tied together with steel wire. In this case 150 mm long double loop ties, twisted with a special tool to save the boys wrists. With the two layers of steel mesh correctly positioned and tied together works started to add the “L bars” which form the starters for the walls.
At this stage there was a final check on the location of the starter bars to make sure the walls of the basement are in exactly the correct place. The timber frame will be fitting directly on top of these basement walls and so they have to be just right otherwise there will be some costly changes when the timber frame arrives!