I am in the process of finishing my basement. I will be installing a 32x60 shower pan. Walls are already framed out and plumbing is roughed in. I will be using Hardiebacker. I have a few questions:
The pan instructions recommend a 1/4" gap between the pan and Hardiebacker. Is this filled with thinset mortar or silicone?
Is Hardiebacker OK installed on ceiling to be painted?
Assuming no gaps between Hardiebacker panels or corners and all panels are butted up tight right everywhere, I use thinset mortar and alkali tape on seams and screws, correct? Same process for the niche?
Then I will be two coating everything with Redgard or a similar product.
Any additional tips or suggestions?