Although many ceramic tiles look the same, there are quality differences. The quality of raw materials, the firing process, and the sophistication of glazing applications that create realism will determine the quality of the finished product. These quality differences are often reflected in the price.
Selecting the right surface glaze is an important step when selecting floor tile. Floor tiles are rated for glaze wear and slip resistance, which are important factors to consider. Glaze ratings should exceed 3 for residential applications with the exception of bath areas that can use tiles rated 2. Tiles with a slip resistant rating of 0.5 or better should work well in most indoor residential applications.
Use caution when selecting tile for installations outdoors. Unglazed quarry tiles, tiles with heavily textured surfaces, or porcelain paver tiles, all with slip resistant ratings of 0.6 or greater are possibilities. They must also be frost resistant.