Know the range and types of beads and the background they are used on Secure beads to backgrounds Introduction Aim Introduction to beads and their uses Objective To recognise different beads where they should be positioned and how to fix them ID: 1029196
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1. Secure resources - BeadingKnow the range and types of beads, and the background they are used on
2. Secure beads to backgroundsIntroductionAim:Introduction to beads and their usesObjective:To recognise different beads, where they should be positioned and how to fix them2
3. Secure beads to backgroundsIntroductionWhat do you know?How many types of bead can you name?What materials are beads made from?How are beads fixed?How do you cut beads?Why would you not fix external beads with gypsum plasters?3
4. Secure beads to backgroundsBeadsStandard angle beadThe standard angle bead is used to form reinforced angles when floating and skimming. The bead is galvanised steel to prevent it from rusting. The standard angle bead is also available in stainless steel or as a plastic bead to suit a variety of different circumstances.4
5. Secure beads to backgroundsBeadsStop beadThe stop bead is used to form a finished edge between different backgrounds or surface materials as shown. Using a stop bead stops unsightly cracks between different materials and creates a definite finished line. 5
6. Secure beads to backgroundsBeadsMovement / expansion beadThe main use for this bead is to form a movement joint where there is a movement joint in the background materials to avoid cracking.This bead is can be used to form a finish between two different backgrounds to compensate for the differing expansion rates of the materials.6
7. Secure beads to backgroundsBeadsThin coat angle beadsThin coat angle beads are used to reinforce the external angles on plasterboard. They are also available with mesh wings to assist when bedding in position.7
8. Secure beads to backgroundsBeadsThin coat stop beadsThin coat stop beads are used in the same way as a standard stop bead but only used internally for finish plasters.8
9. Secure beads to backgroundsBeadsPlasterboard edge beadThis bead is used to protect the edge of the plasterboard when there is no abutment.9
10. Secure beads to backgroundsBeadsBellcast beadThis bead is found externally. It forms a drip at the bottom of an external render and can also be used above door and windows for the same reason. When used at the base of a rendering it must be placed above the DPC as shown.10DPC
11. Secure beads to backgroundsUsing beadsCutting beadsBeads are relatively easy to cut, but need care to avoid cuts from sharp metal edges.Firstly the length is measured and marked on the bead using a marker pen, then the nosing of the bead is cut with a hacksaw. The beads wings are then cut using a pair of tin snips.11
12. Secure beads to backgroundsUsing beadsFixing beadsFixing beads is, in principal, the same for all types of beads, they can be fixed both mechanically or bedded using appropriate materials.The beads should be fixed either plumb or level, and should be in alignment, and the nosing of the bead should always be left clean and free of any excess materials.12
13. Secure beads to backgroundsUsing beadsFixing beadsWhen fixing the beads, daubs of finish plaster should be put either side of the angle at a distance of no more than 600mm.If mechanically fixing, the fixings should also be spaced no more than 600mm apart. When fixing beads externally for rendering the beads should be fixed with the same mix as the render being applied or mechanically. Never use gypsum plasters.13
14. Secure beads to backgroundsUsing beadsFixing beadsThe bead should be put in place then checked for alignment, plumb or level. If bedded any excess materials should be removed before they set, and the nosing cleaned.14
15. Secure beads to backgroundsConclusion You should now have the knowledge to complete the following:How many types of bead can you name?What materials are beads made from?How are beads fixed?How do you cut beads?Why would you not fix external beads with gypsum plasters?15
16. 16Thank you