Bathroom floor tiles, whether ceramic or vinyl, must be properly installed before you install a toilet. This sometimes involves a waiting period. Even if the toilet is already in place before you install the tiles, remove it, lay the tiles and re-install the toilet.
After you lay ceramic floor tiles, the grout inside the joints between the individual tiles must cure. Allow at least overnight for this process. To be sure, allow 24 hours from the time you grout the joints to when you install the toilet. Be sure to smooth down the grout lines so they are slightly below the surface of the tiles. Clean up all the excess grout from the tile surface.
The last steps in laying vinyl tile are making certain that all the excess glue and air bubbles are removed from the tile surface. Allow the adhesive that is used to glue vinyl tiles to the floor to fully dry before setting the toilet or any other objects, such as the bathroom vanity, on the tile. Follow the particular adhesive manufacturer's instructions for how long to allow the adhesive to dry. Once the adhesive fully dries, install the toilet.
After Removing the Toilet
The toilet should always be removed when laying new tile flooring in the bathroom. If not, the surface of the new tile will be higher than the toilet base, making it harder for you to notice potential leaks from beneath the fixture. While the toilet is off the flange, examine the flange's condition to make sure it's not broken. Also examine the floor area around the flange. This prevents you from installing new flooring over damage that should be repaired first. Cut the tile so it curves around the flange.
Toilet Installation Reminders
Be sure to scrape all the wax residue from the flange and from the bottom of the toilet, using a putty knife. Before installing the toilet, press a new wax ring onto the bottom of the toilet, or place the wax ring on top of the flange. With the additional height added by the tile, especially the thicker ceramic tiles, install extenders, if needed. Extenders are basically rings that raise the flange's height to be even with the new flooring so an effective seal can be created between the toilet and flange.