I'm going to use Prova-Flor + 5/8 T&G OSB + Laminate flooring planks for flooring in my basement, so the total height should be around 1 1/2". I'm not sure what to do about the bathroom, though.
I could use Ditra membrane + ceramic tiles directly over concrete, which is relatively straight-forward, but I'm concerned that:
- The floor will be very cold, especially during the winter.
- The floor in the bathroom will be much lower than in other rooms.
Products like Prova-Flor do not list ceramic tiles as supported top floor, so I'd like to know what could I use to try to insulate the top ceramic tile layer from the cold concrete beneath it. I don't want to actively heat the floor, though.