So a 3 8 u notched trowel leaves a 1 8 bed of thinset beneath the installed tile.
Thinset thickness for large wall tile.
Many thinsets max out at 1 4 in a single layer.
In the case of travertine the back of the tile is smooth so a larger notched trowel wouldn t necessarily be required.
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.
A 3 8 x 3 8 trowel will leave a 3 16 bed of thinset beneath the tile.
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.