Hi folks: This my first post of any kind - ever - so be gentle.
Project started as a simple re-tiling of a 1970s shower-toilet-vanity. Replace the floor tiles (and install in-floor heating at the same time), replace the wall tile around the shower and toilet area, and replace the floor tile in shower.
I found the bottom row of wall tiles around the shower just fell off into my hands. The gyproc behind was wet, so I ripped off all the gyproc around the shower to see if there was any damage to the framing (None, thankfully).
The shower pan is galvanized, 48"x34". I dug out the wet gyproc around the mud+tile slab, which left a 3/4" trough all the way round the inside of the floor pan. There was some free water in the bottom (I wonder why that would not have drained away?)
The shower never leaked. It's on the 2nd floor with no access from below without major damage to 1st floor ceiling. I want to use the Kerdi membrane on the shower walls.
Q1: Is it wise to keep the galvanized floor pan? If not, I have to rip out the entire floor and start again?
Q2: If I can keep it and chip off the existing shower floor tiles, I would want to run the Kerdi membrane down the walls and across the floor pan before installing the new shower floor tiles: Is it possible to tie the Kerdi membrane to the existing shower drain? Or do I have to excavate the old drain and replace it with the Shluter drain? Is that even possible?