Tried tapping on the plaster in the wall. The plaster is very porous and easily falls off in pieces. From the 1940s. No effort needed at all. Tiles will be placed there later. Feels like the whole wall might come off.
My question is:
How much do you need to remove? Should it only be what's very, very loose and leave the rest? There's electrical wiring behind the wall to a socket.
Can the wall be repaired with Husfix or should it be something else?
