Abstract: A floor defining structure reliant upon a confinement periphery around a bed of compacted free draining material on which is positioned one or more floor panel support pads. The floor itself is supported directly or indirectly by both the confinement periphery and the pads. The pads are of such a kind that will not provide any wicking upwardly of any moisture from the bed material and are heat insulating in nature. Preferably each pad comprises an insulating material above a damp coarse layer and below a structural layer to which and/or into which the floor defining panel or panels can be fixed by adhesive, nailing and/or screwing.