The document discusses materials used in plastering, including different types of plasterboard, expanded metal lath, and pre-formed beads. It describes the various thicknesses, sizes, and special characteristics of plasterboards, such as moisture resistance, fire resistance, soundproofing, and impact protection. Different types of expanded metal lath and pre-formed beads are also outlined. The document provides information on these materials to support learning for a Level 1 Diploma in Plastering.

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PowerPointpresentation
Material recognition
Unit 123: Fixing sheet materials

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Assessment criteria
1.5 identify different types of materials used for jointing
plasterboards
2.6 follow current environmental and current health and
safety regulations
3.1 describe different types of pre-formed beads and
expanded metal lath (EML)

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Plasterboards
• Plasterboard is gypsum
that is sandwiched
between two sheets of
paper.
• It has a number of
properties and can be
made in a variety of
sizes.
www.youtube.com/watch?v=tmbk8Pfau0I&feature=youtu.be

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Task:
How many different thicknesses and sizes of plasterboard
can you name?
Plasterboards

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Plasterboard sizes
Plasterboard sheets are commonly 9.5mm and 12.5mm
thick.
They come in a variety of sizes:
• 1,200mm x 900mm
• 1,800 x 900mm
• 2,400mm x 1,200mm.

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Types of plasterboard
There are different types of plasterboard that can be used
for various purposes and also to meet specific building
regulations.
Can you think of any reasons why plasterboards may be
made differently?
www.british-gypsum.com/products/plasterboard___accessories/10_things_you_should_know.aspx

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Types of plasterboard
Types of plasterboard
include:
• soundproofing
• fire resistance
• moisture resistance
• thermal insulation
• impact protection.

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Sound bloc
• For use where improved sound
performance is required.
• They have a higher density core
and are blue in colour.
www.british-gypsum.com/~/media/Files/British-Gypsum/Data-Sheets/DS-Gyproc-HandiBoard.pdf

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Did you know?
Part E of the building
regulations stipulates minimum
noise levels for residential
buildings and different types of
acoustic plasterboard are
available to meet these
stipulations.
www.planningportal.gov.uk/uploads/br/BR_PDF_ADE_2003.pdf

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Fire resistance
• Used in partition, wall lining and ceiling
systems to give increased fire protection.
• Pink plasterboard with glass fibre and
other additives in the core.
www.british-gypsum.com/~/media/Files/British-Gypsum/Data-
Sheets/PDS-Gyproc-FireLine.pdf
Part B of the building regulations
relates to fire safety and various
types of plasterboard have been
made to meet the requirements.
www.planningportal.gov.uk/uploads/br/BR_App_Doc_B_v2.pdf

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Moisture resistant (MR)
• Plasterboard with water-repellent additives in the core
and paper liners.
• For use in wet areas.
• They are green in colour.
www.british-gypsum.com/~/media/Files/British-Gypsum/Data-Sheets/DS-Gyproc-
Moisture-Resistant.pdf

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Thermal insulation
Layers of polystyrene or foam
can be added to plasterboard in
order to improve its thermal
properties.
www.british-gypsum.com/~/media/Files/British-Gypsum/Data-Sheets/PDS-Gyproc-
ThermaLine-BASIC.pdf

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Impact protection
• Plasterboards with a higher
density core with glass fibre
and other additives.
• Designed to give greater
impact resistance in heavy use
areas.
www.british-gypsum.com/~/media/Files/British-Gypsum/Data-Sheets/PDS-Gyproc-
DuraLine.pdf

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Plain expanded metal lath (EML)
• Made from good quality
steel.
• Available in stainless
steel.
• Expanded into
diamond-shape mesh.
www.youtube.com/watch?v=WRw4PnROvzk

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Rib Lath
• Stiffened by steel ribs
10mm deep.
• Formed from the same
piece of metal.

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Hi-rib Lath
• Has strengthening
pressed into it during
manufacture.
• Stronger than Rib Lath.

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Pre-formed beading
Beads can be used for one- and two-coat work and
come in a range of thickness.
They can be referred to as thick and thin coat beads or
floating and skim beads.

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Preformed beading – thick beads
• Floating/thick beads are
usually mesh with either a
nosing or a stopped
return.
• Range from 10mm to
19mm.
• Used for two-coat work
(float and skim).

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Preformed beading – thin beads
• Thin or skim beads are usually
perforated along the length.
• Range from 3mm to 6mm.
• Used for one-coat work
(skimming).

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Jointing tapes
Jointing tapes are designed to cover the gaps left between
plasterboards, giving strength and aiding in preventing cracking.
Some tapes need to be adhered using plaster mixes, whereas modern
day tapes are pre-glued.
Reinforcing materials include:
• self-adhesive scrim tape (fibreglass)
• non-adhesive scrims:
• hessian/jute scrim
• cotton/bandage scrim
• paper tape.

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Any questions?