Do I need to put down hardie- backer under a membrane shower pan?It has 2 layers of 3/4 inch plywood on the floor. Wont 2 layers of 30# felt do.
Where the 1/2 backer board meets the 1/2 green board,…I made the joint just inside the shower stall line so that the backer board is’nt visible, and the tile will over lay that joint. Mortar and mesh tape.? Also, where the backer meets the drywall ceiling,..mortar or drywalll mud? Tile goes all the way up. I am so used to using green board that these details I don’t know about.