Remove the tile and prepare the wall according to the corresponding instructions above or tile over the existing tile.
Mudding a wall before tiling.
If it was just a small spot ok.
The technique of layering means for you to apply one layer of filler and let it dry before you apply the next coat.
I would redo the wall yes more work and a delay but it is not a patch it will be right when you finish it and all those other issues you bring up will also be addressed in one instance.
Sand the area with medium grit sandpaper until even and vacuum up the dust.
How to make a plaster wall level before adding tiles.
As for mudding to make it even i would not even attempt it.
Start with planning your wall tile installation.
If the drywall dust is not removed before applying the primer the primer will not stick to the wall.
Wash the wall with tsp tri sodium phosphate or an ammonia based cleaner to remove any grease or oil.
Count how many tiles you ll need.
How to use mud on uneven drywall.
Drywall is smooth flat and easy to install.
Sealing your shower walls is essential for tiling the surface to prevent moisture from effecting the integrity of your tile installation.
Use even pressure and do not force the primer onto the.
Vacuum clean and wipe the walls.
Cement backer board a type of wall.
If existing tiles are beyond repair remove the tile and install a piece of wallboard in its place.
Repair any loose or cracked tiles.
Prime to seal it and let dry.
You may also paint this area if only tiling a portion of the wall to minimize cut in work around the tile.
To do so make sure all of the tiles are intact and secure.
Do a precise measurement of the surface.
Even walls covered in drywall.
Poor adhesion causes texture to peel and bubble from the wall and create an unprofessional looking texture and plaster finish.
Wipe with a damp cloth to remove any remaining dust and allow to dry.
Prime the surface prior to the tiling.
Plywood or drywall is insufficient as a subfloor because it is a permeable material that will rot away when exposed to water.