6708 13 l1_123_presentation_1

Level 1 Diploma in Plastering

© 2013 City and Guilds of London Institute. All rights reserved.

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PowerPoint presentation

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?

Education

6708 13 l1_123_presentation_1