/wawl"bawrd', -bohrd'/, n.
material manufactured in large sheets for use in making or covering walls, ceilings, etc., as a substitute for wooden boards or plaster.
[1905-10; WALL + BOARD]

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▪ building material
      any of various large, rigid sheets of finishing material used in drywall construction to face the interior walls of dwellings and other buildings. Drywall construction is the application of walls without the use of mortar or plaster.

      Wallboard materials include plywood and wood pulp, asbestos-cement board, and gypsum. Wood fibre and pulp boards are made by compressing together layers or particles of wood with adhesives and are manufactured with wood grain and a variety of other surface effects. They are also available with high acoustic (sound-suppressing ) and thermal (insulating) capacities. Asbestos-cement boards are formed from a mixture of portland cement and asbestos fibre that has been wetted and then pressed into a board or sheet form. Organic fibres are added to some asbestos-cement boards to promote resiliency and ease of machining, and boards can also be treated with curing agents, water-repellent admixtures, and a variety of other substances to improve their performance and the ease with which they can be worked. Thin asbestos-cement sheets are usually backed with plywood or insulating board to increase their resistance to impact.

      One of the most common wallboard types is the gypsum panel. Gypsum, a natural mineral in crystalline form, is a hydrous sulfate of calcium. Gypsum board contains a gypsum rock core sandwiched between two layers of special paper. In fire-resistant panels, required for many types of construction, glass fibres are mixed with the gypsum base. Panels manufactured with an aluminum backing are used for insulation. Gypsum wallboard is manufactured both unfinished and finished with a variety of vinyl and other finishes in permanent colours and textures that require no additional treatment to complete the appearance of interior wall surfaces.

      Gypsum boards, wood sheets, and wood pulp boards are also used as a sheathing material to cover the exterior of a building's wood superstructure.

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Universalium. 2010.

Look at other dictionaries:

  • wallboard — [wôl′bôrd΄] n. fibrous material, commonly prepared with gypsum, made in thin slabs for making or covering walls and ceilings, in place of plaster, etc …   English World dictionary

  • wallboard — noun Date: 1906 a structural boarding of any of various materials (as wood pulp, gypsum, or plastic) made in large rigid sheets and used especially for sheathing interior walls and ceilings …   New Collegiate Dictionary

  • wallboard — noun a construction material of pre made boards used for walls and ceilings, usually a gypsum core with a paper surface. Syn: drywall, sheetrock …   Wiktionary

  • wallboard — wall|board [ wɔl,bɔrd ] noun uncount PLASTERBOARD …   Usage of the words and phrases in modern English

  • wallboard — n. plasterboard, sheet of plaster that usually sandwiched between two pieces of cardboard and is used in construction to cover interior walls or ceilings …   English contemporary dictionary

  • wallboard — noun chiefly N. Amer. a type of board made from wood pulp and plaster, used for covering walls and ceilings …   English new terms dictionary

  • wallboard — wall•board [[t]ˈwɔlˌbɔrd, ˌboʊrd[/t]] n. bui material manufactured in large sheets for use in making or covering walls, ceilings, etc., as a substitute for wooden boards or plaster • Etymology: 1905–10 …   From formal English to slang

  • wallboard — /ˈwɔlbɔd/ (say wawlbawd) noun an artificial sheet material for use in making or covering walls, ceilings, etc., as a substitute for wooden boards or plaster …   Australian English dictionary

  • wallboard — noun a wide flat board used to cover walls or partitions; made from plaster or wood pulp or other materials and used primarily to form the interior walls of houses • Syn: ↑drywall, ↑dry wall • Hypernyms: ↑board • Hyponyms: ↑beaver board,… …   Useful english dictionary

  • Magnesium oxide wallboard — (10 mm thickness) Magnesium oxide more commonly called magnesia is a versatile mineral that when used as part of a cement mixture and cast into thin cement panels under proper curing procedures and practices can be used in residential and… …   Wikipedia

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