ANGLE
BEAD
A thin metal angle designed to reinforce plaster edges at external
angles.
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Plaster that has lost the bonding key and lifted. This sounds
hollow to tapping.
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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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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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A trade name for bonding plaster.
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A trade name for finishing plaster, usually pink in colour.
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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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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.
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The base coat of plaster or the sand cement coating, which is
applied externally.
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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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A reinforcing mesh tape, previously made from jute and since
replaced with plastics.
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Thin finishing coat of plasterwork.
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A thin coat of plaster applied as finishing over base render
or direct to boards.
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Feather-edge boards that have the joints filled and covered
for direct decoration to avoid plastering.
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