is a building construction material, usually 1/2 to 3/4 inches (13 to 19 mm) in thickness, made by the extrusion process from natural clay
Sizes and shapes
The most traditional size in the US is nominally 6 inches by 6 inches by 1/2 inch thick. Other common sizes include 4 inches by 8 inches and 8 inches by 8 inches.
Traditional quarry tile was unglazed and either red or gray in color. However, modern "decorator" tiles come in a variety of tints and finishes. Industrial quarry tile is available with abrasive frit
embedded in the surface to provide a non-slip finish in wet areas such as commercial kitchens and laboratories.
Quarry tile is extensively used for floors where a very durable material is required. It can be used either indoors or outdoors, although freeze-resistant grades of tile should be used outdoors in climates where freeze-thaw action occurs. Quarry tile is used less often as a wall finish and is occasionally used for countertops
, although the wide grout joints can make cleaning of countertops difficult.
For floors, quarry tile is usually set in a thick bed of cementitious mortar
. For wall applications, it can be set in either a thick bed of cementitious mortar or a thin bed of mastic
. For both floors and walls, the joints between tiles are usually grouted with cementitious grout
. Grout joints are traditionally about 3/8 inch in width. Matching trim shapes such as coves
, bases, shoes, and bullnoses
are available to turn corners and terminate runs of the tile.