Reinforced concrete raft
The timber formwork is made, the steel reinforcing is in place and connected to the piles themselves.
There are two sheets of mesh held apart with spacers. The layout of the steel reinforcing is designed by our structural engineer.
Beneath the steel mesh is a void former, this is a collapsable material, such as Claymaster, which is strong enough to support the weight of the concrete, but will disintegrate over time to leave a space beneath the raft. This space will allow the ground to swell without affecting the new structure.