A tile is a manufactured piece of hard-wearing material such as ceramic, stone, metal, or even glass. Tiles are generally used for covering roofs, floors, and walls, showers, or other objects such as tabletops. Alternatively, tile can sometimes refer to similar units made from lightweight materials such as perlite, wood, and mineral wool, typically used for wall and ceiling applications. Less precisely, the modern term can refer to any sort of construction tile or similar object, such as rectangular counters used in playing games (see tile-based game). The word is derived from the French word tuile , which is, in turn, from the Latin word tegula , meaning a roof tile composed of baked clay.
Tiles are often used to form wall and floor coverings, and can range from simple square tiles to complex mosaics. Tiles are most often made from ceramic, with a hard glaze finish, but other materials are also commonly used, such as glass, marble, granite, slate, and reformed ceramic slurry, which is cast in a muld and fired.
Roof tiles
Roof tiles are designed mainly to keep out rain, and are traditionally made from locally available materials such as clay or slate. Modern materials such as concrete and plastic are also used and some clay tiles have a waterproof glaze. A large number of shapes (or "profiles") of roof tiles have evolved. These include:
- Flat tiles - the simplest type, which are laid in regular overlapping rows. An example of this is the "beaver-tail" tile. This profile is suitable for stone and wooden tiles, and most recently, solar cells.
- Imbrex and tegula, an ancient Roman pattern of curved and flat tiles that make rain channels on a roof
- Roman tiles - flat in the middle, with a concave curve at one end at a convex curve at the other, to allow interlocking.
- Pantiles - with an S-shaped profile, allowing adjacent tiles to interlock. These result in a ridged pattern resembling a ploughed field. An example of this is the "double Roman" tile, dating from the late 19th century in England and USA.
- Mission or barrel tiles are semi-cylindrical tiles made by forming clay around a curved surface, often a log or one's thigh, and laid in alternating columns of convex and concave tiles.
Roof tiles are 'hung' from the framework of a roof by fixing them with nails. The tiles are usually hung in parallel rows, with each row overlapping the row below it to exclude rainwater and to cover the nails that hold the row below.
There are also roof tiles for special positions, particularly where the planes of the several pitches meet. They include ridge, hip and valley tiles.
History
Fired roof tiles are found as early as the 4th millennium BC in the Early Helladic House of the tiles in Lerna, Greece. Debris found at the site contained thousands of terracotta tiles having fallen from the roof. In the Mycenaean period, roofs tiles are documented for Gla and Midea.
The earliest finds of roof tiles in archaic Greece are documented from a very restricted area around Corinth (Greece), where fired tiles began to replace thatched roofs at two temples of Apollo and Poseidon between 700-650 BC. Spreading rapidly, roof tiles were within fifty years in evidence for a large number of sites around the Eastern Mediterranean, including Mainland Greece, Western Asia Minor, Southern and Central Italy. Early roof tiles showed an S-shape, with the pan and cover tile forming one piece. They were rather bulky affairs, weighing around 30 kg apiece. Being more expensive and labour-intensive to produce than thatchet, their introduction has been explained by their greatly enhanced fire resistance which gave desired protection to the costly temples.
The spread of the roof tile technique has to be viewed in connection with the simultaneous rise of monumental architecture in ancient Greece. Only the appearing stone walls, which were replacing the earlier mudbrick and wood walls, were strong enough to support the weight of a tiled roof. As a side-effect, it has been assumed that the new stone and tile construction also ushered in the end of 'Chinese roof' ( Knickdach ) construction in Greek architecture, as they made the need for an extended roof as rain protection for the mudbrick walls obsolete.
Tiling was extensively used by Sinhalese kings of ancient Sri Lanka. most of the time they used polished and smoothened stones, which were laid on floors and swimming pools. Historians suggest that they have used advanced techniques and tools for tiling because each tile fits perfectly to the other that not a blade can be inserted in between. They can still be seen at Ruwanwelisaya and Kuttam Pokuna in the city of Anuradhapura.
One of the great, 20th Century Italian Tile Masters, was Giuseppe Damato, an immigrant from Barletta, Italy who set many masterpieces in the Bay Area.
Floor tiles
These are commonly made of ceramic, porcelain, or stone, although recent technological advances have resulted in rubber or glass tiles for floors as well. Ceramic tiles may be painted and glazed. Small mosaic tiles may be laid in various patterns. Floor tiles are typically set into mortar consisting of sand, cement and often a latex additive for extra adhesion. The spaces between the tiles are nowadays filled with sanded or unsanded floor grout, but traditionally mortar was used.
Natural stone tiles can be beautiful but as a natural product they are less uniform in color and pattern, and require more planning for use and installation. Mass produced stone tiles are uniform in width and length. Granite or marble tiles are sawn on both sides and then polished or finished on the facing up side, so that they have a uniform thickness. Other natural stone tiles such as slate are typically "riven" (split) on the facing up side so that the thickness of the tile varies slightly from one spot on the tile to another and from one tile to another. Variations in tile thickness can be handled by adjusting the amount of mortar under each part of the tile, by using wide grout lines that "ramp" between different thicknesses, or by using a cold chisel to knock off high spots.
Some stone tiles such as polished granite, marble, and travertine are very slippery when wet. Stone tiles with a riven (split) surface such as slate or with a sawn and then sandblasted or honed surface will be more slip resistant. Ceramic tile for use in wet areas can be made more slip resistant either by using very small tiles so that the grout lines acts as grooves or by imprinting a contour pattern onto the face of the tile.
The hardness of natural stone tiles varies such that some of the softer stone (e.g. limestone) tiles are not suitable for very heavy traffic floor areas. On the other hand, ceramic tiles typically have a glazed upper surface and when that becomes scratched or pitted the floor looks worn, whereas the same amount of wear on natural stone tiles won't show, or will be less noticeable.
Natural stone tiles can be stained by spilled liquids; they must be sealed and periodically resealed with a sealant in contrast to ceramic tiles which only need their grout lines sealed. However, because of the complex, non repeating patterns in natural stone, small amounts of dirt on many natural stone floor tiles do not show.
Most vendors of stone tiles emphasize that there will be variation in color and pattern from one batch of tiles to another of the same description and variation within the same batch.
Stone floor tiles tend to be heavier than ceramic tiles and somewhat more prone to breakage during shipment.
Rubber floor tiles have a variety of uses, both in residential and commercial settings. They are especially useful in situations where it is desired to have high-traction floors or protection for an easily breakable floor. Some common uses include flooring of garage, workshops, patios, swimming pool decks, sport courts, gyms, and dance floors.
Ceiling tiles
Ceiling tiles are lightweight tiles used in the interior of buildings. They are placed on a steel grid and, depending on the tile selected, may provide thermal insulation, sound absorption, enhanced fire protection, and improved indoor air quality. Also frequently called ceiling panels, or drop-ceiling tiles, they offer the advantage of easy access to wiring and plumbing above the ceiling grid, and can be easily changed, removed, or replaced as n
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