There is also a spot near the window trim where the wall appears to be built up too much enough so that the tile could end up proud of the trim which i m pretty sure won t look so hot.
Tiling onto uneven walls.
Thoroughly vacuum the area and give the wall a once over with a damp sponge or cleaning cloth.
Seal the walls with a skim coat and let it dry thoroughly.
Back buttering is a trick used for tiles of uneven thickness like ungauged slate or handmade tiles extremely large tiles or for tiles being installed on an uneven surface.
Once the cement is dry apply the bonding agent that should give the surface a rough texture.
The mortar is spread.
For an uneven concrete floor a floor leveller will solve all your problems.
How to prepare an uneven wall or floor for tiling plastering.
Then flush and fill the areas with cement.
If you put a 48 straight edge up against the most sunken areas there s a gap of almost a 1 2.
The problem is that the wall is uneven.
Level those uneven walls.
Use a flat scrap of wood to even and smoothen out the surface and let this dry for a few hours or overnight.
You want the tile adhesive to have something to grab onto.
Plastering the walls is the best way to ensure that the walls are nice and even.
Self levelling compound for an uneven floor.