I was replacing one kitchen floor tile which had been cracked. I removed the cracked title, cleaned the old thinset, applied new thinset, spreaded it with a 1/4” trowel and put a new title. Well, the problem was that the height of the new title was a lot lower than the other ones. I found out that the thinset layer of the existing tiles was thick — it was about 3/8”.
Does anyone know the best way of leveling with the thick thinset layer? Should I use a trowel with a larger notch? Or, does it make sense to put another mortar layer over the backerboard so that the gap is reduced? Then, leveling the mortar layer seems to be tricky. Any advice is appreciated.