Question: what trowel do i use for tile?
Answer: All tile manufacturers offer a recommended trowel size. Mosaic installations up to 2 inches can use a 1/8-inch notch, as can wall tiles of up to 4 inches, as a general rule. 16-inch tiles need a 1/2-inch-deep notch, and anything over 24 inches should use a 3/4-inch notch.