Vinyl composition tile
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Vinyl composition tile (VCT) is a finished flooring material used primarily in commercial and institutional applications. Modern vinyl floor tiles and sheet flooring and versions of those products sold since the early 1980s are composed of colored polyvinyl chloride (PVC) chips formed into solid sheets of varying thicknesses (1/8" is most common) by heat and pressure. Floor tiles are cut into modular shapes such 12" x 12" squares or 12" x 24" rectangles. In installation the floor tiles or sheet flooring are applied to a smooth, leveled sub-floor using a specially formulated vinyl adhesive or tile mastic that remains pliable. In commercial applications some tiles are typically waxed and buffed using special materials and equipment.
Modern vinyl floor tile is frequently chosen for high-traffic areas because of its low cost, durability, and ease of maintenance. Vinyl tiles have high resilience to abrasion and impact damage and can be repeatedly refinished with chemical strippers and mechanical buffing equipment. If properly installed, tiles can be easily removed and replaced when damaged. Tiles are available in a variety of colors from several major flooring manufacturers. Some manufacturers have created vinyl tiles that very closely resemble wood, stone, terrazzo, and concrete and hundreds of varying patterns.
In 1894, Philadelphia architect Frank Furness patented a system for rubber floor tiles. These tiles were durable, sound-deadening, easy to clean and easy to install. However, they stained easily and deteriorated over time from exposure to oxygen, ozone and solvents, and were not suitable for use in basements where alkaline moisture was present.
In 1926, Waldo Semon, working in the United States, invented plasticized polyvinyl chloride. Polyvinyl chloride (PVC) is a plastic containing carbon, hydrogen and chlorine. It is produced by the process of polymerisation. Molecules of vinyl chloride monomers combine to make long chain molecules of polyvinyl chloride. Polyvinyl chloride (PVC) based floor coverings, commonly known as vinyls  made its big splash when a vinyl composition tile was displayed at the Century of Progress Exposition in Chicago. Because of the scarcity of vinyl during the war years, vinyl flooring was not widely marketed until the late 1940s, eventually became the most popular choice for flooring in just about any hard-surface application.
Luxury vinyl tile (LVT)
LVT is an industry term, not a standard, for vinyl that realistically mimics the appearance of natural materials with an added layer to improve wear and performance. The extra layer of protection is usually a heavy film covered with a UV-cured urethane that makes it scuff, stain and scratch resistant.
Polyvinyl chloride (PVC) tiles are a commonly used floor finish made from polyvinyl chloride. Due to the small size of the tiles, usually 150 mm, 225 mm and 305 mm, any damage can soon be repaired by replacing individual tiles (as long as some spares are kept).
The tiles are made of a composite of PVC and fibre, producing a thin and fairly hard tile.
PVC tiles are prone to some issues. The glues used on self-adhesive tiles sometimes give way, causing edges to lift and get broken by foot traffic. The surface wears, in time causing difficulty in cleaning, then loss of the coloured pattern layer. Finally, a very smooth sub-floor is required to lay them on, otherwise they gradually become cut by the foot pressure above and the shallow edges below.
The main advantages of PVC tiles are low cost, ease of replacing individual tiles, and the fact that the tiles can be laid with only brief periods available. In fact, a DIYer with assorted ten-minute slots in otherwise busy days would have enough time to get a floor laid gradually, and thus can avoid professional installation costs.
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