(1) Concrete slab
(2) High strength (>40N/mm2) levelling bed (by others)
(3) Optional 1.14mm thick EPDM membrane or torch applied waterproofing membrane (by others)
(4) M6 x 75mm galvanised dipped, carbon steel, self-tapping concrete screws
(5) Continuous aluminium floor frame
(6) Continuous foam spacer
(7) Finishes/wearing surface