It was on my tiling course when one of the tilers said about buttering the tile instead of just applying the adhesive straight onto the walls.
My tiling bay was really uneven and the guy on the course said in my case "there were 3 of us on the course" since my walls were so uneven I was better off applying the adhesive to the back of each tile in different amounts so I could level up the job as I went along.
If I have just used the 6mm trowel to apply the adhesive my tiles would of just followed the run of the wall and ended up with a rather large grout line after the window, so I was told on uneven surfaces like this I was always better off applying large amounts of adhesive to the back of the tiles so the extra adhesive would pack out the shallow dips in the wall.
Obviously the wall should of been nice and flat to start with since it was my first attempt at tiling, but that wasn't the case.
So all I was wondering was if many of you did this or if the walls were that bad, did you prep them in any way first.
fekin who told you to do it that way was it the person who was training you?