Fill the gap between the tile and the tub with caulk.
													
																	How to install ceramic wall tile around a bathtub. 
									
	
		
	
																	Apply it to the wall with the bottom edge about 1 4 in. 
																	Above the lip of the tub. 
																	Follow the order shown in the diagram to snap the rest of the lines. 
																	I cover some of the specifics of how to layout and set up a tub to install tile around it. 
															
													
									
	
		
	
																	Then apply a generous amount of thin set to the bottom bathtub tile and position it 1 8 in. 
																	The best approach when installing cement board or other tile backer around a tub is to keep the cement board out of the lip area. 
																	This video will show you how to set tile around a tub. 
																	If the tub is level start with a full tile at its rim. 
															
													
									
	
		
	
																	Check if you need to adjust this mark to avoid laying slivers of tile at the top and bottom. 
																	When tiling around a tub mark the first layout line at the vertical edge of the tile next to the tub. 
																	For a tub surround only install the backerboard and tile 12 inches above the tub.