Board Under Tile

Cement based backer board.

Board under tile. This provides a solid surface under the tile that prevents flexing that could lead to cracking. Cement board also provides an additional layer over a plywood or particleboard subfloor adding stiffness to the tile. Use a polymer modified thin set a type of mortar to attach the backer board to the subfloor. You ll be under 1 8 inch with the thinset layer under the backer board.

Could you perhaps recommend a different trowel size to set the cement board and or tile. Probably under at the tile layer also. This is a distinct advantage over plywood and drywall. It is generically called cement board or backer board or it can also be referred to by one of the common brand names such as densshield hardiebacker and wonderboard.

The polymer modified thin set provides additional strength and helps eliminate any movement between the backer board and the subfloor. Whether it s a wall floor or countertop tile installation using the right substrate is crucial for preventing cracks and breaks in the tile and grout. Now largely regarded as the very best underlayment for ceramic tile in any application floors walls and countertops cement based backer board goes by many names. A successful tile installation depends largely on the type substrate the tile is adhered to.

July 5 2020 at 5 26 pm. The primary benefit of cement board is that it doesn t break down or expand or warp if it gets wet.