Elevated bathroom floor advice
I'm building a bathroom and sauna in my basement. I have to run the drain pipes underneath the floor because I didn' have plumbing put in when it was built. I'll be using a Saniflo toilet to pump waste/water up to my drain pipe.
I'll have to raise my sauna and shower floor about 8". What are the recommendations for creating a good solid raised tile floor? Vertical treated 2x8s? What about spacing? And I was planning on going with cement board on top of that, Ditra, then tile. My sauna drain will run and unite with my shower drain, which will empty into the Saniflo pump.
Any recommendations or advice? Thank you.