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Like glass tiles, you will not need to seal most porcelain tiles, particularly if the porcelain is already glazed. It depends on quality. Porcelain is very water resistant, but it is not 100% waterproof. To avoid staining, some homeowners use a penetrating sealer. It is also a good idea to seal your grout. Unless you use epoxy grout, grout is very porous and can harbor bacteria, mold, and mildew.

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.

Your floors should be completely level for tile, otherwise you risk damaging the tiles in the future. When there are even small gaps or hills in the subfloor beneath the tile, this puts more pressure on the tile when you walk around on the floor. With repeated traffic, the tiles are at risk of cracking, and you’ll have to deal with tile repairs sooner than if the floor was completely level.

How long painted tiles last ultimately comes down to the quality of the paint job and how much wear and tear the tiles get. It’s possible the paint job will only last about six months if the tiles are in a high-traffic area and they weren’t properly cleaned, sanded, and primed prior to painting and sealing. Well-painted tiles in a low-traffic area should last at least a year.