Jun 11 2011 the thinset thickness is determined by the size of the trowel used and the size of the trowel is determined by how the back of the tile is constructed and the size of the tile.
Thinset thickness for large wall tile.
Mar 20 2019 the 2011 tile industry standards define the minimum bond layer thickness to be 3 32 after beat in but the maximum thickness has more to do with the manufacturer of the thinset mortar you are using.
Mapei large format floor tile 50 lb gray powder thinset medium bed mortar item 1103731 model 2184323 good adhesion for ceramic porcelain and natural stone tiles with one or more sides greater than 15 in.
Spread the mixture using a notched trowel whose notch size.
Many thinsets max out at 1 4 in a single layer.
Using a u notched trowel and embedding the tile into the thinset leaves you with a bed of thinset beneath the tile a little over 1 3 the size of the trowel teeth.
A 3 8 x 3 8 trowel will leave a 3 16 bed of thinset beneath the tile.