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You can technically install tile over tile, but we don’t suggest it. Installing tile over any surface that isn’t a completely flat and prepared subfloor will result in a shoddy overall job, uneven flooring, tiles that don’t adhere, extra weight, gaps, cracks, and room for moisture and dirt to enter. For the best results, only install new tile on a flat, sanded surface like subflooring or concrete that is prepared for tile.

If you have asbestos tile and would rather tile over it than remove it, or if your existing tile is completely flat and bonded tightly to the floor, you may be able to tile over existing tile. But experts recommend thinking twice before you do.

No, tiling over painted walls or wallpapered surfaces is generally not recommended. Textured surfaces and paints will affect the adhesive, possibly causing tiles to lift or fall off. Painted walls with a semi-gloss or high-gloss finish are particularly difficult for adding tiles. It’s wise to strip the paint first if you install the tiles to drywall, although it’s still best to opt for a cement backer board.

On average, tiling a bathroom involves about 12 hours of labor, usually spread over two to three days to accommodate prep work and curing times. A professional tiler can often complete the installation in 6 to 8 hours, whereas a DIYer might take 10 to 16 hours. The total project time is influenced by factors like the bathroom layout, tile type, and necessary prep work, such as removing old tile. The process includes specific timelines for different areas; for example, tiling a floor takes about six hours, while a shower area can take six to ten hours. It is essential to allow for adequate curing time—typically 24 hours each—for the mortar, grout, and caulk, which is why the project extends over several days.

There are a few different tools you can use to score tiles. Manual tile cutters or tile scribes work well for scoring in straight lines. Tile nippers are one of the best options for scoring because they can make small and irregular cuts that larger tools may not be able to handle.