I will soon be tiling our shower in our basement finish and I have a few questions. I have done some floor tile before, but this is my first opportunity with a shower. Installing a 30"x60" wide shower pan. I will be using 1/2" Hardibacker for the shower area, 97" ceilings. I will be leaving the recommended expansion gap between all boards covered with Alkali tape and thinset.
Is this expansion joint also needed between the Hardibacker and ceiling drywall?
If so, what is this area sealed with?
On the back wall, should I fill the expansion joint between the Hardibacker and drywall with Alkali tape and mortar there as well?
What's the best way to go about where the Hardibacker meets the lip of the shower pan? Another expansion joint? Does it go over the lip and sealed at the bottom with silicone?
I'll be waterproofing with Regard.