6708 13 l1_123_presentation_5

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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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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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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Thanks to its flexibility, it

can also be shaped to

make curved walls and

to form arches.

EML



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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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Cutting Rib Lath

• Use the same process used for EML.

• A hacksaw will be needed to cut ribs



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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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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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Fixing EML

• EML should be fixed from the centre outwards.

• EML must be kept taut when fixing.



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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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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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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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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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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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Fixing floating beads



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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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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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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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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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Any questions?

6708 13 l1_123_presentation_5

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