Acd fibrous presentation 3

Level 3 Diploma in Plastering

© 2013 City and Guilds of London Institute. All rights reserved.

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Preparing and running in-situ mouldings

PowerPoint Rupresentation

Unit 311: Running in-situ moulds



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Learner outcomes 3.1, 3.2 & 3.7 Identifying types of PPE and potential hazards

3.5 Identifying the sequence of running mouldings

3.4 Identifying procedures for setting out prior to running

5.1 & 5.2 Identifying the procedure for coring out and running the finish

3.6 Identify different types of bracketing

5.3 Explain and describe how to form mitres and returns including short breaks

5.5 Explain and describe procedure for running curved work

5.2 Explain and describe procedure for running cornices with enrichments



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Protecting the work area and PPE Due to the nature of the work you will need to wear PPE (glasses, gloves overalls etc) to protect you from skin burns and splashes.

Reading the risk assessment and following a safe method of work can reduce the risk and possible dangers on building sites.

There will be many hazards such as working at heights, slips and trips, manual handling and using hazardous substances.

Walls and floors will need to be protected from plaster splashes.

Protecting film, visqueen sheets, dust sheets, plywood, hardboard or similar sheet material should be used.

Safety signs are used identifying and warning of possible dangers, identifying safe routes and access to carry out the work safely.



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Running in-situ cornice schedule of work Running and forming the mould is a skilled job for any plasterer and there are several stages to complete that will help you carry out your work safely and efficiently.

•  Selecting appropriate PPE

•  Setting up a working platform

•  Forming a plaster screed on ceiling

•  Fixing the running rule

•  Muffling the mould

•  Running the core

•  Running the finish



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Procedure for running in-situ cornice core •  Plaster screed •  Ratio •  Preparation •  Proceed



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Procedure for running in-situ cornice core •  Timber rule •  Rebate •  Preparation •  Procedure



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Muffling the running mould with a false profile Running moulds are muffled to reduce the thickness of the finish, making it simpler to run and obtain the finish without uneven swelling. Muffles are made from zink, aluminum, plywood or plaster. Template muffles are fixed approximately 6mm proud of the profile. Plaster muffles will need to be shaped with a small tool within approximately 6mm of the profile.

Use of images is great. Copy in the image.

Note details of the image and its source on the artwork log.



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Method for mixing and running core •  Coring out •  Materials •  Ratio •  Preparation •  Application of sequence



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Mixing and running finish for in-situ cornice •  Running the finish •  Tools and equipment •  Materials •  Ratios •  Preparation •  Application of sequence



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Procedure for bracketing in-situ cornice

•  Preparation •  Fixing

Brackets are used to reduce the weight of the core, which may become

problematic at a later stage.



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Different types of bracketing



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Internal mitres After running a cornice the internal mitres will need to be made good by filling and forming each moulding member. •  Tools and equipment •  Preparation •  Materials •  Ratios •  Application and sequence of work



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External mitres



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Forming short breaks Where there are small returns to be formed, a bench with an up-stand is constructed to run small lengths of positive moulds.

The running mould is a run cast method used to make short breaks. The run cast is cut and bedded in line with the moulding members and made good.

Application and sequence of the work.



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Running in-situ curved cornice Alterations will need to be made to the running mould allowing it to run on the curved background. •  Stock •  Rebate •  Timber rule Take a look at the link below: this will give you a broad look at the way the mould has been run. www.youtube.com/watch?v=QtVoht6QAYs



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Running bedding enrichments When enrichments are to be incorporated into the design, the running mould will contain a rebate in the profile to allow for such detail. Enrichments are detailed and ornate plaster work that have undercut sections and therefore unable to be run in-situ.



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Enrichments Detailed patterns such as flowers, egg and dart, acanthus leaves, lamb’s tongue are just some of the designs that are used. These smaller undercut designs are cast from flexible moulds and planted in place with casting plaster.



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Acd fibrous presentation 3

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