We have an old former pigsty that will be converted into something else. Specifically, a piece of floor about 45 sqm that we want to do something about so that moisture and odor do not seep up from underneath (digging out is not an option). One idea is if it is possible to first use self-leveling compound, then plasticize the floor and then cast concrete? Another idea is to plasticize the floor, put up joists and lay polystyrene insulation in between, and then a wooden floor. Do both options work? Grateful for help /Lotta