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Plasterboard

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  • Drywall (also known as plasterboard, wallboard or gypsum board) is a panel made of gypsum plaster pressed between two thick sheets of paper. It is used to make interior walls and ceilings.

  • A plaster board is made of a paper liner wrapped around an inner core made primarily from gypsum plaster.

  • The raw natural gypsum, CaSO4·2 H2O, is heated in a process called calcined to produce the hemihydrate of calcium sulfate (CaSO4·˝ H2O) this is done in kettle or flash calciners.

  • The plaster is mixed with fiberglass), plasticizer, foaming agent, finely ground gypsum crystal as an accelerator, EDTA, starch or other chelate as a retarder, various additives that may increase mildew and/or fire resistance (fiberglass or vermiculite), wax emulsion or silanes for lower water absorption and water.

  • Plasterboard is commonly made with one of three different edge treatments—tapered edge, where the long edges of the board are tapered with a wide bevel at the front to allow for jointing materials to be finished flush with the main board face, plain edge, used where the whole surface will receive a thin coating (skim coat) of finishing plaster, and finally bevelled on all four sides, used in products specialised for roofing.

  • The most common use of gypsum plaster boards is in the making of false ceilings in residential, commercial, hospitality and healthcare sectors.

  •  A metal framework is suspended from the ceiling slab and plaster boards are then attached with the help of screws to it.

  • The use of plaster boards for false ceilings is recommended particularly since their size is large.

  • The large size can cover up a larger area of the ceiling and results in lesser joints.

  • This reduces the chances of cracks. The boards can be cut accordingly to insert light fixtures for concealed lighting. Attractive designs like steps, curves can also be easily incorporated

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