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Porcelain Refinish Repair questions, answered by experts

No, when done correctly, removing the tile shouldn’t damage the subfloor. However, if there was pre-existing damage to the subfloor from standard use or lack of maintenance, the subfloor may need repairs. For example, if the contractors notice mold growth on the subfloor or an uneven surface, you may need more extensive services before installing new tile.

If you DIY tile removal, remove the tiles one step at a time, individually removing the tile, grout, and mortar to prevent unnecessarily damaging the subfloor. Depending on the age of your home, consider having a professional inspect the subfloor to ensure it’s in good enough condition to lay new tile.

Although it may be challenging to assess damage behind your tiles visually, be on the lookout for these telltale signs that could hint at water damage. Inspect for an accumulation of excessive water near your tub and shower, notice any unpleasant mildew odors, or observe cracks in the grout. If you notice any of these warning signs, it's advisable to contact a local plumbing repair company to evaluate and address the issue promptly.

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.

You can regrout over old grout, but you risk poor adhesion, a sloppy appearance, and decreased lifespan. It’s best to remove cracked, damaged, and moldy grout with a grout saw. Vacuum the area before applying new grout. Apply the new grout with a grout float and remove excess grout with the edge of the float. Seal the grout for maximum durability and longevity.

Unfortunately, you can’t put new grout on top of old grout. Regrouting requires a smooth surface in order to fill in cracks, so you’ll have to remove the old grout first. If you don’t, your new grout won’t just look bumpy—it also won’t properly adhere. Once it cures, it will start to chip away, leaving you right where you started.

The Richardton, ND homeowners’ guide to porcelain refinishing services

From average costs to expert advice, get all the answers you need to get your job done.

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