6708 13 l1_123_presentation_5
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Transcript of 6708 13 l1_123_presentation_5
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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PowerPoint presentation
Measure, cut and fix pre-formed beads and EML
Unit 123: Fixing sheet materials
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Assessment criteria
3.2 state the importance of accurate measurements
3.3 describe different methods for fixing pre-formed beads and EML
4.3 measure pre-formed beads and EML
4.4 cut pre-formed beads and EML to given sizes
4.5 select methods for fixing pre-formed beads and EML
4.6 fix pre-formed beads and EML
4.7 apply safe working procedures for measuring, cutting and fixing pre-formed beads and EML
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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EML
Expanded metal lathing can be
fixed for a variety of reasons.
Most common for a plasterer is to
use strips to cover timber wall
plates and composite
backgrounds.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Thanks to its flexibility, it
can also be shaped to
make curved walls and
to form arches.
EML
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Cutting EML
EML is sharp and gloves
should be worn when cutting
and handling.
1. Measure size required.
2. Mark on EML.
3. Join the marks using a
straight edge.
4. Snip the mesh and fold
away as you go.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Cutting Rib Lath
• Use the same process used for EML.
• A hacksaw will be needed to cut ribs
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing EML
EML can be fixed to
timber backgrounds
by using:
• clout nails
• staples
• galvanised nails.
It should be spaced
150mm apart.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing EML
EML can be fixed to metal frame backgrounds by using: • galvanised wire • galvanised screws.
It should be spaced 150mm apart.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing EML
• EML should be fixed from the centre outwards.
• EML must be kept taut when fixing.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing EML
EML sheets should
overlap by 50mm on the
short edge and 25mm
along the long edge
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Cutting pre-formed beads
1. Measure the length required.
2. Mark length on bead.
3. Cut through nosing with a hacksaw.
4. Cut through wings with snips.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing beads
Beads can be fixed in a variety of ways depending on their size and use:
• nail
• screw
• staple
• adhesive.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing floating beads
• Floating beads are also known as angle beads.
• Check background for plumb prior to fixing so that you have a good idea of thickness of adhesive.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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1. Apply adhesive to both sides of the external corner using a hand board and trowel.
2. Dots/fixings should be spaced at 600mm apart.
3. Press bead into fixing compound, ensuring the wings are held in place.
4. Using a spirit level and straight edge, check for plumb.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing floating beads
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Openings
The nosing of the bead should be
checked in 3 places and all of the
bead must be touching the spirit
level.
Spirit level checking 3
positions
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing skim beads
Skim beads should be fixed using:
• clout nails
• staples.
Screws can be used but the head tends to sit proud.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Fixing skim beads
• The fixings will be put through the pre-formed holes and into the background.
• Care must be taken not to hit the nosing during fixing.
• The fixings must be below the nosing to allow a covering of plaster.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Extending beads
• Beads can be joined to extend their length by placing a rod or headless nail in the nosing.
• Ensure that the beads run continuously in line.
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Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
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Any questions?