Insulation is 1" thick polystyrene. The photo's show 3" of thickness already inserted. Another 1" sheet will be put over this to make up a final 4" thickness.

3" of Polystyrene in place. One final sheet to be put over this.

Back wall waiting for final sheet.

Door hung after a lot of swearing. Note diagonal timbers to stop door sagging.

View of finished corner section. Polystyrene is held in place with galvanised nails through zinc washers. The stands will be against the walls & will hold it all together.