When tiling walls with floor tiles consideration must be given to weight as floor tiles are often heavier than wall tiles.
Preparing your floor for tile. Carefully drive the pry bar between the floor and the molding and lever the molding away from the wall a bit. Tiling over an existing floor. Preparing an uneven floor surface.
Scrape the flat edge of your trowel or craft stick across the top of the patch to make sure it is level with the floor. Let the patching compound dry according to the manufacturer's. Remove the toilet and the wax seal ring (you will need to replace the wax ring with a new one).
Once the floor is properly cleaned and prepared, dry lay the tile, leaving a 1/4” gap. Then clean with a wet mop of plain water. Planning time & tiles depending on the size of the room it will take a few days to prep the floor as you need to.
Actually, the answer would be the same, no. Most commonly you will find plywood subflooring or grout lines must be filled in if using. If you lay your tile over existing.
Measure and mark the middle for the two remaining sides of the floor. Just mark where they go on the floor. Remove the tiles and lay a new substrate.
If you have wooden floors, you must have a 6mm cement backer board bonded to. The rigidity standard recommended by the tile council of north america (tcna) is l/360, which means that the floor shouldn't flex more than the length of the floor joists divided. Broken plumbing should be repaired, and stained areas should be.