Try to get a straight answer from any of the big self levelling manufacturing companies including: Rapid Set, Mapei, and Ardex, or from Schluter themselves – it won’t happen.
We figured it would work, and decided to do a little research and development in a friends 100 year old house. It was the perfect worst case scenario. The floor was 2″ out of level over 10 ft, the space was a 4th floor attic and access was a spiral staircase. After many calls and research, we were offered very little support from the self levelling providers and decided call from past experience and “wing it”.
The results are pretty impressive. In the centre of the room there is a massive 200kg free standing tub that holds two people and 327 Litres of water. I have seen a couple minuscule hair line cracks that after 6 months have not become any sort of an issue. This is definitely a possible application, cost on the other hand might make it prohibitive. As a guess it would run $15- $25 per sq/ft with the DITRA and nuheat system.
