A.Michael Byrne responds: On the surface, a tile's suitability for a particular application may not be readily apparent. The strength and durability of a tile are determined by the ingredients making up the bisque, or body, of the tile; the type of glaze used, if any; and how long and at what temperature the tile is fired.

Wall tiles often have decorative or high-gloss glaze applications that are really appropriate only on wall surfaces. Floor tiles, on the other hand, may be used for either floor or wall applications.

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