Yes, you will have to clean the grout with a brush or CRB but with the advances in chemistry you don't need to blast the tile with 1000+ psi. I would be sure to have teflon glides on wand. FYI I used to clean tile with a wand but changed over to a Bonzer. It works great and has minimal overspray. I normally clean with 400-500 psi. You should be fine and make lots of $.