On top of the 2 6 will be 3 4 subfloor thinset cement board redgard thinset tile.
													
																	Do i need cement board under floor tile. 
									
	
		
	
																	The primary benefit of cement board is that it doesn t break down or expand or warp if it gets wet. 
																	Cement board is a type of underlayment that is now standard for most tile installations but particularly for floor tile. 
																	I d like to get as close as possible to matching the height of the existing tile. 
																	Cement board also provides an additional layer over a plywood or particleboard subfloor adding stiffness to the tile. 
															
													
									
	
		
	
																	This is a distinct advantage over plywood and drywall. 
																	If i thinset the cement board down using a 1 4 x 1 4 trowel and screw it every 8 will the thinset end up being 1 8 thick.