1 4 x 3 8 square notch.
													
																	Trowel for wall tile. 
									
	
		
	
																	Use this for 8 8 s and some of the 5 16 thick 12 12 builder grade tile. 
																	This may also be a good trowel size for thicker 5 16 mosaics. 
																	When you use a 1 4 x 3 8 square notched trowel you will leave 1 4 wide by 3 8 high ridges of thinset on the substrate with spaces between each ridge. 
																	The larger the tile the larger the trowel. 
															
													
									
	
		
	
																	A tile trowel with only one measurement i e. 
																	Twelve inch square tiles for instance are best applied using a trowel with 1 2 inch by 1 2 inch notches. 
																	This thin set mortar is applied onto the wall or floor surface with a notched trowel providing the tiles with a base of ridged mortar that when compressed provides a complete bond with the. 
																	As 1 2 trowel means that both measurements are the same. 
															
													
									
	
		
	
																	Also make sure the thin set mortar you hand mix yourself is also rated for vertical surfaces. 
																	Anytime you use 12 x 12 or smaller vertical wall tile you always use a v notched trowel rated for tile installations since it is made specifically for vertical surfaces to bond the mastic mortar successfully.