Download Gap Between Tub And Floor Tile Pics . Ideally, you would leave 1/8 inch gap which would then have sealant applied to it. How do you waterproof that? Filling Gap Between Tile And Tub Doityourself Com Community Forums from www.doityourself.com The most common solution to gaps in an existing installation is caulk. Too many gaps, extremely wide gaps, or a floor that has movement (creaking or loose boards) may require extensive repair. Very little is said in these threads about the recommended/acceptable gap between the tub and the first row of tiles, or at least i am not looking in the right place. Instatrim provided us with a perfect solution to cover gaps between glass and drywall at our newly constructed office. If this happens in your home, remove the grout. I was fixing several lines of grout in my tub and with further inspection i see the previous homeowners used a lot of ...