Can moisture from the sand and aggregate under a slab cause rising damp?
...floor by 1 foot 2 inches to the level of an existing kitchen floor. The floor to be levelled is a concrete slab floor and in good condition. My plan was to lay four inches of aggregate /crushed rock topped with 2 inches of sand with a sheet of plastic layed on top of the sand. On top of the sand I intend to put 4 inche...