I have read all the posts, and I am getting a little confused. I also am trying to put in a shower on a slab floor. I bought the liner and what I am unsure of is the order of the process. The area where I am building the shower pan is where there was a old tub. The slope will go forward to the old drain of the tub. So do I use thin set to build a slope? Then is the liner put in place? then do I put more thin set or cement board on the rubber liner? Then tile? Thanks Jesse