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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
1 of 21
PowerPoint presentation
Material recognition
Unit 123: Fixing sheet materials
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
2 of 21
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)
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
3 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
4 of 21
Task:
How many different thicknesses and sizes of plasterboard
can you name?
Plasterboards
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
5 of 21
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
6 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
7 of 21
Types of plasterboard
Types of plasterboard include:
• soundproofing
• fire resistance
• moisture resistance
• thermal insulation
• impact protection.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
8 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
9 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
10 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
11 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
12 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
13 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
14 of 21
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
15 of 21
Rib Lath
• Stiffened by steel ribs 10mm deep.
• Formed from the same piece of metal.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Hi-rib Lath
• Has strengthening
pressed into it during
manufacture.
• Stronger than Rib Lath.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
17 of 21
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
18 of 21
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).
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
19 of 21
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).
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
20 of 21
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.