View
470
Download
0
Category
Preview:
Citation preview
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
1 of 20
PowerPoint presentation
Measure, cut and fix pre-formed beads and EML
Unit 123: Fixing sheet materials
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
2 of 20
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
3 of 20
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
4 of 20
Thanks to its flexibility, it
can also be shaped to
make curved walls and
to form arches.
EML
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
5 of 20
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
6 of 20
Cutting Rib Lath
• Use the same process used for EML.
• A hacksaw will be needed to cut ribs
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
7 of 20
Fixing EML
EML can be fixed to
timber backgrounds
by using:
• clout nails
• staples
• galvanised nails.
It should be spaced
150mm apart.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
8 of 20
Fixing EML
EML can be fixed to metal frame backgrounds by using: • galvanised wire • galvanised screws.
It should be spaced 150mm apart.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
9 of 20
Fixing EML
• EML should be fixed from the centre outwards.
• EML must be kept taut when fixing.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
10 of 20
Fixing EML
EML sheets should
overlap by 50mm on the
short edge and 25mm
along the long edge
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
11 of 20
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
12 of 20
Fixing beads
Beads can be fixed in a variety of ways depending on their size and use:
• nail
• screw
• staple
• adhesive.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
13 of 20
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
14 of 20
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
15 of 20
Fixing floating beads
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
16 of 20
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
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
17 of 20
Fixing skim beads
Skim beads should be fixed using:
• clout nails
• staples.
Screws can be used but the head tends to sit proud.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
18 of 20
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
19 of 20
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.
Level 1 Diploma in Plastering
© 2013 City and Guilds of London Institute. All rights reserved.
20 of 20
Any questions?
Recommended