ANGLE BEAD
A thin metal angle designed to reinforce plaster edges at external
angles.
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BLOWN
Plaster that has lost the bonding key and lifted. This sounds hollow
to tapping.
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BONDING
A lightweight plaster containing exfoliated vermiculite (a mineral
used as a bonding material) as an aggregate used in two-coat plastering,
to adhere to smooth surfaces or to make good uneven surfaces. It has
some insulation properties.
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BROWNING
A gypsum plaster mixed with sand, site or premixed, and used as an
undercoat. This is rarely used nowadays as it is quite heavy to spread
compared with the lightweight bonding plasters.
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CARLITE
A trade name for bonding plaster.
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CERIPITE
A trade name for finishing plaster, usually pink in colour.
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DUPLEX BOARD
Plasterboard that has a vapour barrier of aluminum foil on one side.
This is used for ceilings, and sometimes walls, where it is important
to prevent air-bourne moisture passing through and condensing.
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FEATHER
EDGE
Plasterboard that has tapered edges to allow a jointing plaster and
tape to cover the joint. These are smoothed off so that the joints
do not show. The decoration can then be applied without the need for
finishing plaster. |
RENDER
The base coat of plaster or the sand cement coating, which is applied
externally.
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SCREED
A dryish mixture of coarse, washed sand laid to a depth of 50-75mm
over concrete flooring to provide a smooth, steel trowelled surface
for a floor finish. The screed has low load resistance and is easily
damaged, so must be protected prior to the covering being fitted.
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SCRIM
A reinforcing mesh tape, previously made from jute and since replaced
with plastics.
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SET
Thin finishing coat of plasterwork.
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SKIM
A thin coat of plaster applied as finishing over base render or direct
to boards.
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TAPED JOINT
Feather-edge boards that have the joints filled and covered for direct
decoration to avoid plastering.
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