Stick-on vinyl tiles are meant to make installation easy, but the work is doubled if you have to remove the existing floor. In some cases, the tiles can be placed right on top of an existing vinyl floor, as long as it meets certain conditions.
Stick-on vinyl tiles can be laid directly over an existing vinyl floor as long as the floor is in good condition. The existing vinyl must be securely attached to the sub floor and not bubbling, lifting or curling at the edges. There should not be any visible seams, and the vinyl must still be soft and pliable and not crumbling, degrading or splitting. Any damage in the existing floor will show through the new vinyl tiles. Medium-grit sandpaper can be used to smooth rough tile areas. If the floor is textured or has any dents or dings, spread a liquid underlayment or embossing leveler over the existing vinyl before applying the stick-on tiles.