Large wall tile trowel.

[Just Rizzle]

i tend to use 500 mmtrowels which i modify by snapping of every other notch deff get 100% especially on the floors and back butter as i go.
tiling is the easy bit its the prep that counts , get the floor level and could practically put them down thin bed usebags of tilemaster level 30 ready to go in 30 / 40 mins even quicker if mix with warm water.

 

[Dumbo]

Tech department are going to love the warm water recommendation