Two layers of a highly moisture resistant, high compressive strength DCT XPS insulation are laid in a staggered pattern. For moisture management, a ProctorGeo vapour barrier is placed over the insulation prior to pouring the reinforced cold store floor slab.

ProctorGeo Vap120 is a light duty air and vapour control layer.

DCT GA 300 is a closed cell high compressive strength, low moisture absorption extruded polystyrene (XPS) general application board for insulating roofs, walls and floors in commercial and residential applications.