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Tiling can be DIY with the right tools and skills, but challenges like ensuring evenness and appropriate adhesion often warrant professional handling.

Yes, you can tile over existing shower tiles, but it's better to remove the old tiles first for the best results. Tiling over existing tiles requires a clean, level surface and proper adhesion. If the old tiles are in good condition, you can roughen the surface to improve adhesion. However, removing the old tiles ensures a smoother, longer-lasting finish and prevents potential issues down the line.

The number of boxes of tile you need depends entirely on the amount of tile in each box or case. Different manufacturers package their tiles differently, and boxes contain different amounts of tile depending on the size, shape, and material. Often, the amount of area that a case will cover is listed in the product description. To calculate the number of boxes you need, take the total square feet of the space and divide it by the number of square feet the box will cover.

Tile—specifically smaller, mosaic-style tiles—is the best type of flooring for building a walk-in shower base. Shower pans come with a threshold and sidewalls to contain the water, but tile can be set into the shower base. This creates a walk-in shower floor that gently slopes toward the drain to keep water from getting out and into the rest of the bathroom.