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Various sized cuts of 1 ⁄ 2 in (13 mm) drywall with tools for maintenance and installation . Drywall (also called plasterboard, dry lining, [1] wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of calcium sulfate dihydrate (), with or without additives, typically extruded between thick sheets of ...
Due to the development of more fire-resistant gypsum board, it has decreased in popularity as a wall sheeting. Homasote is found in studio spaces and featured in many art institutions as a wall covering and doubling as a type of cork board. It often receives hundreds of coats of paint over the years due to the product's strength. [citation needed]
A gypsum block is made of gypsum plaster and water. The manufacturing process [1] is automated at production plants where raw gypsum (CaSO 4 ·2H 2 O) is ground and dried, then heated to remove three-quarters of the bound water and thus transformed into calcium sulfate hemihydrate (CaSO 4 ·½H 2 O), also known as gypsum plaster, stucco, calcined gypsum or plaster of Paris.
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A multi-family residential building under construction with rigid panel exterior insulating sheathing. Rigid panel insulation, also referred to as continuous insulation, [1] can be made from foam plastics such as polyurethane (PUR), polyisocyanurate (PIR), and polystyrene, or from fibrous materials such as fiberglass, rock and slag wool.
Simplifications have used a formula involving the board ECT, the board thickness, and the box perimeter. Most estimations do not relate well to other box orientations, box styles, or to filled boxes. In order to calculate the value of BCT ( Box compression test ), the formula of McKee would be the easiest but also the least accurate [ opinion ] .
As a tile backing board, cement board has better long-term performance than paper-faced gypsum core products because it will not mildew or physically break down in the continued presence of moisture or leaks. Also cement board provides a stronger bond and support with tiles than typical gypsum board. Cement board is not waterproof.
It has 17 gypsum board plants in the US and presents itself as a fully integrated building products manufacturer. [1] It is a private company, incorporated as New NGC, Inc. in 1993 after previously filing for Chapter 11 bankruptcy in 1990. [2] In 1995, Clemmie Spangler took over National Gypsum for $1.2 billion, through Delcor Inc., a private ...