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Drywall
Panels and Sheets |
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Drywall panels cover most walls and ceilings built over the last 40
years. These panels have a layer of gypsum sandwiched between heavy
paper facings. A waterproof type sometimes called green board is used
in bathrooms and other areas subject to heavy moisture. The sheets,
which are relatively inexpensive, are 4 feet wide, 1/4 to 5/8 inch
thick, and 6 to 16 feet long. The standard size is 1/2 inch thick
and 8 feet long.
Drywall sheets are applied to studs, joists, or rafters with drywall
nails or screws, or with adhesive. Joints between the panels are covered
with a paper or fiberglass tape and coated with several layers of
smooth, plasterlike joint compound.
Most ceilings are built with the same materials and methods as walls.
They consist of wood framing members joists rather than wall studs
and normally are clad with drywall or plaster.
A conventional drywall ceiling consists of drywall panels screwed
or nailed to ceiling joists. Joints between the panels are taped and
finished with drywall compound using the same methods as for walls.
These ceilings are normally hung before the drywall is applied to
the walls. Older ceilings often have lath-and-plaster construction.. |
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