The shuttering has been built for the basement slab which is the very base of the house. Within this is fitted the special insulation and eventually the waterproof concrete will be poured up to the the top of the shuttering

With the base flat Tom & James start to lay two layers of 60mm Styrodur insulation. This is a special non-compressible form of expanded polysyrene which is laid as overlapping waterproof boards.

With all the Styrodur in place we are ready for the waterproof membrane which will be laid just before a 50 mm layer of concrete is poured to form a firm base onto which the reinforced concrete slab can be built.

Eventually more Styrodur will be attached to the walls of the basement so that it sits in a warm envelope which will encapsulate the whole house. This is a key element of the energy saving design.