There are several tools that you will use together to install tiles. Four of the most basic tools needed in tile installation include a notched trowel for applying tile adhesive, a tile cutter or saw for cutting tiles to size, tile spacers for creating the appropriate amount of space between tiles, and a grout float for applying grout.

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.

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.

You can let the tile sit without grout. Don’t panic if there’s a delay between installing the tiles and grouting. A substantial stoppage isn't a problem, provided you keep the tile surface clear of dust and debris. Also, avoid walking over less stable ungrouted floor tiles as they are more prone to premature cracking and shifting.