The mortar is spread.
Tiling with unlevel walls.
Extra mortar is applied to areas that need it either areas with dips in or areas with thinner tiles.
Plastering backer boards and self levelling compound are all great options.
The problem is that the wall is uneven.
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.
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.
The area of the wall to be tiled minus the area of the window is 37 square feet.
There are numerous ways to make a bumpy uneven or unlevel surface ready for tiling.
I explain why this method works soooo easy.
If you put a 48 straight edge up against the most sunken areas there s a gap of almost a 1 2.
Here is an easy way to set your 1st row and the rest going up your wall then lastly the first row is set.