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No, you don’t need to remove the old grout before installing new tile over existing tile. In fact, the old grout helps fill in gaps between tiles, creating a more even surface for the new layer. However, it's important to ensure that the grout is clean, solid, and free of cracks or crumbling areas. Damaged grout should be repaired or replaced before proceeding. Cleaning the surface thoroughly and filling any low spots will help the new adhesive bond properly and ensure a smooth, stable installation.

It’s best to start with tiling the shower floor before moving on to the walls for the most visually-pleasing results. When taking on any tiling project, you’ll want the wall tiles to “sit” neatly on the floor tiles rather than overlapping them. Finishing your floor tiles first will allow you to place your wall tiles without any gaps, holes, or awkward intersections.

Tile shouldn’t be set tight against the tub. Bathtubs can expand when filled, and they can shift slightly with the weight of occupants. For this reason, it’s important to leave a slight gap between the bathtub and the first row of tile. Aim for a narrow gap of approximately 1/16 of an inch, filled with caulk, to allow for this expansion and movement while still allowing for tile shower waterproofing.

Tile will almost always last longer than laminate flooring, regardless of the type of tile installed. Porcelain tile can last for 75 years or more with proper care, and even less durable ceramic tile will last for 60 years or more, provided they’re installed by a tile professional. On the other hand, laminate flooring has an average lifespan of around 20 years, and you might only get 10 to 15 years out of low-cost laminate flooring. As such, tile will add far more value to your home than laminate.