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The easiest tile size to install is large tiles, and they’re easier to install than small tiles—the job is faster and simpler when there’s less placing, adhering, and grouting to do. However, when tiles get really big, they’re more difficult to handle, cut, and fit. Standard floor tile sizes are 12-by-12 inches, 18-by-18 inches, and 12-by-24 inches.

You can technically install tile over tile, but we don’t suggest it. Installing tile over any surface that isn’t a completely flat and prepared subfloor will result in a shoddy overall job, uneven flooring, tiles that don’t adhere, extra weight, gaps, cracks, and room for moisture and dirt to enter. For the best results, only install new tile on a flat, sanded surface like subflooring or concrete that is prepared for tile.

If you have asbestos tile and would rather tile over it than remove it, or if your existing tile is completely flat and bonded tightly to the floor, you may be able to tile over existing tile. But experts recommend thinking twice before you do.

The tile trim you use will depend on a few factors, including design preferences, budget, and whether the project is DIY or not. You might choose plastic trim if you want an easier DIY job that is more budget-friendly. There are also more color options available in plastic. On the other hand, you might choose metal to match your fixtures or for areas with heavy use.

For professional labor and materials, it would cost between $6,000 and $28,000 to install 1,000 square feet of Saltillo tile flooring. If that’s out of your budget, you could consider laying the tiles yourself or choosing a less expensive type of flooring. For example, vinyl flooring costs just $2 to $7 per square foot, so for a 1,000-square-foot space, you’d pay $2,000 to $7,000.