Plastering backer boards and self levelling compound are all great options.
Tiling with unlevel walls.
Believe it or not there are more uneven walls and floors than there are even ones.
The problem is that the wall is uneven.
Short answer to how to prepare an uneven wall or floor for tiling.
Back buttering is a common solution to tiling uneven walls and floors or using tiles of varying thicknesses.
I explain why this method works soooo easy.
Here is an easy way to set your 1st row and the rest going up your wall then lastly the first row is set.
Things you will need measuring tape tile wet saw leveling spacers and wedges trowel thinset mortar rubber mallet grout grout float grout sponge.
The mortar is spread.
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.
Extra mortar is applied to areas that need it either areas with dips in or areas with thinner tiles.
If you put a 48 straight edge up against the most sunken areas there s a gap of almost a 1 2.