Floor should be

You can also use self -leveling mixtures, so -called bulk floors. To increase the sound — and thermal insulation, you can lay a layer of polystyrene foam, and use a polymer film on top as a waterproofing. The bulk floor dries much faster than an ordinary screed. It is permissible to lay laminate, various carpets and ceramic tiles directly on the bulk floor itself. A large plus of the bulk floor is a small thickness (up to 3 centimeters), it is good for rooms with low ceilings. To improve thermal insulation, the combined floor should be used — a layer of self -leveling mixture is poured onto the usual screed.