With the shuttering removed you can see the first bases in their full concrete glory.

Single retaining wall panel at the rear of the building.

Two bases close together were poured as one. The stairs down into the basement will be about here.

View from above at the rear of the building.

The perinsul block is a stronger version of the T4 foamglas insulation used else where. It sits under the 75mm block work which goes against the rock.

The T4 Foamglas joins the perinsul to complete the insulation and waterproofing around the entire underground structure. The (orange) radon barrier isn't needed in this design but offers a safety factor for both water proofing and radon if there was a split in the foamglas.

The vertical part of each retaining wall panel is built from two skins of blocks filled with two layers of insulation; a DPM and reinforced concrete. Here you can see the external skin of blocks being built. The orange plastic is the DPM.

The backing blocks are part of the insulation for the basement.

The black material in front of the backing blocks is the foamglas insulation.