1. Ceiling Roses Casting and Fixing

2. Learning Outcomes By the end of the session, you should be able to…… Recognise at least two types of ceiling rose Design a basic ceiling rose Describe the procedure used when casting a ceiling rose Explain one method of fixing a small to medium rose in a central position to a ceiling

3. Types of Ceiling Rose Roses come in a variety of shapes and sizes They can be split into three categories... Solid cast Vented cast And Sectional cast

4. Solid Cast Ceiling Rose As its name suggests this type of ceiling rose is a whole casting with no gaps between enrichments

5. Vented Ceiling Rose This cast is so named because of the gaps or vents between its enrichments

6. Sectional Ceiling Rose This type of rose is made up of many individual casts The rose opposite is made up of 42 individual detailed castings

7. Victorian Influence The ceiling rose came into its own during the Victorian period The Victorians were highly influenced by classical orders of architecture Greek and Roman Especially the Corinthian style

8. Corinthian architecture The Corinthian style of architecture can be easily recognised The Acanthus leaf Check out the entrance to Burnley town hall

9. Typical Victorian ceiling roses Elaborate Acanthus Typical Acanthus

10. Questions What kind of rose is made up of many individual casts ? SECTIONAL What's the difference between a solid cast and a vented cast rose ? VENTED CAST HAS GAPS BETWEEN ITS ENRICHMENTS

11. Questions What classical order of architectural style was a major influence on Victorian rose design CORINTHIAN What enrichment is typical of the Corinthian style THE ACANTHUS LEAF

12. Could you design a basic sectional rose ? First draw diagonal lines corner to corner on your paper

13. Then vertical and horizontal

14. From the centre point draw three circles each one larger than the previous

15. Now we can add the enrichments

16. When you are happy with your design erase the guide lines

17. Recap Name three types of ceiling rose ? Solid, Vented and Sectional What classical order of architecture is the acanthus leaf associated with ? Corinthian Who can name the other three classical orders ? Doric, Ionic and Composite

18. Casting a ceiling rose Materials, Equipment and Process

19. Materials required Before we continue see if you can make your own list of materials Fine casting plaster (Plaster of Paris) Retarder (decelerate setting process) Hessian scrim (reinforce the cast) Cotton scrim (reinforcement) Timber lathes (reinforcement) Oil or Grease (lubrication)

20. Equipment required Make a list of the equipment you think is required Good quality P.V.C, Latex or plain plastic mould Mixing bowls Splash brush Buckets (for cleaning) Rule (for striking off) Gloves Dust mask

21. The casting process First we must ensure that our equipment is clean and in good order Then lightly oil the mould This will help in the release of the finished cast

22. P.P.E. Before we begin to mix we must ensure that we are wearing the correct P.P.E Dust mask and gloves Plaster dust if inhaled can cause breathing problems Contact with the skin on a regular basis can cause dermatitis

23. Mixing the plaster The first mix is called the firstings Add a pinch of retarder to the water Now add the casting plaster Leave for approximately one minute before mixing

24. The first pour Make sure the mould is on a flat even surface Pour the mix into the deepest parts of the mould Gently agitate the mould

25. Re-enforcing the mould Moulds of a regular depth and size can be re-enforced using hessian or cotton scrim Larger deeper moulds require timber lathes as support

26. The second pour When the reinforcing material is in place gently pour over a second mix Strike off any excess mix from the top of the mould As the plaster sets it will give off heat Catalytic reaction (chemical reaction)

27. The finished rose When the cast has cooled down it is ready to be turned out 30-40 minutes

28. Questions What is used to slow down the setting process? Retarder What materials are used to reinforce a mould? Hessian or cotton scrim and timber lathes Why do we agitate the mould after the first pour? To make sure the mix has covered all the enrichments and release any air bubbles What is the technical name for the initial pour Firstings

29. Task In your own words, with the aid of diagrams, describe the step by step process of casting a ceiling rose