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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.

On average, tiling a shower costs between $1,800 and $5,000, with most people paying around $2,700. The price of this project depends on multiple factors, including the kind of tile you choose, the size of your shower, and labor rates in your area. If you decide to tile your own shower (instead of hiring a professional), it’ll likely cost $800 to $1,400.

Once cracks appear, it is hard to stop tiles from cracking more. If the cause of the problem is improper subflooring, underlying concrete, improper tile joint sizes, mold growth, or structural issues, the only way to stop floor tiles from cracking is to redo the entire floor, fixing the underlying issues first. If cracks occur after impact damage, hiring a professional tile contractor to replace the cracked tiles, fix loose floor tiles, and restore the grout around them can prevent further damage. It is also important to keep your tile and grout clean and maintained to prolong its life.

For glass tile, you want to use unsanded grout. Sanded grout is a stronger and grittier cement grout that is great for installing tiles with wider gaps and into joints. However, it is susceptible to scratching glass tile and is more difficult to use in thinner gaps. Unsanded grout, while more expensive, is easier to fit between thin gaps and is less harsh on delicate materials, like glass tile.