Solid plastered surface application
Overview
Duration
Minimum 3 days of 6 learning hours per day
Purpose/scope
The purpose of this standard is to provide the delegate with the knowledge to support the use and application of the underpinning historical, technological and theoretical knowledge and the requisite practical skills to undertake the correct evaluation and selection of materials, tools, equipment and craft practices relevant to solid plastered surface application.
Scope:
- prepare surfaces
- apply and finish internal and external plasterwork
- match style and textured finish of existing
- first or pricking up coats
- second coats
- finish coats
- prepare and mix lime putty
- select sand/aggregates for mixing
- pozzolanic additives
- using hydraulic lime and NHL2. 3.5, 5
- protect existing surfaces, flora and fauna
- the main principles of minimum intervention
- match existing work techniques and materials
- record and survey
- re-use of existing materials
- running moulds in-situ
- prepare moulds and casting
- differences between restoration/conservation/repair and alteration
Occupational relevance
Training delivered against this standard would be relevant to the following occupational groups:
- operative and craft
- supervision
- management and leadership
Delegate pre-requisites
There are no delegate pre-requisites as part of this standard.
Instruction/supervision
As a minimum, course trainers must be able to demonstrate that, in relation to this standard, they have:
- an award in education and training (or equivalent, as per requirements for approved training organisations)
- successfully completed training to this standard
- at least 5 years relevant industrial experience
- a verifiable CV
Delivery
Delivery may be in an on or off the job environment.
All materials and equipment must be of a suitable quality and quantity for delegates to achieve learning outcomes and must comply with relevant legislation.
The class size and delegate/trainer ratio must allow training to be delivered in a safe manner and enable delegates to achieve the learning outcomes.
The following delivery methods may be used in the delivery of this standard:
- classroom
- a blend of classroom and remote
This standard is considered to contain 51% or more practical training.
This standard is considered to be set at an intermediate/advanced level.
Assessment
For the successful completion of training, delegates must complete an end of course practical assessment or knowledge test that measures all learning outcomes and has a pass or fail criteria.
Where this training is assessed using multiple-choice questions, a minimum of 10 questions must be asked and delegates are required to achieve an overall pass mark of at least 80%.
Quality assurance
Assured
Quality assurance against this standard will require initial approval of the training organisation and their content mapped to the standard.
CITB will also conduct an approval intervention, either desk-based or centre visit, to ensure the training organisation can meet the requirements of the training standard.
Approved training organisations (ATOs) will be required to present information on records of training and assessment upon request to CITB for desk-based analysis. They will also be visited annually by the CITB quality assurance team.
Renewal
There are no mandatory renewal or recommended refresher requirements for this standard.
Classification
Lifetime
Please note standards using this classification will only be grant aided once per delegate
Approval date
February 2022
Review cycle
On request or 3 years from approval date.
Learning outcomes
The delegate will be able to: | Additional guidance to support learning outcome: |
---|---|
interpret information and follow advice and understand principles of working on period properties |
|
adopt safe working practices |
|
select materials and components |
|
prepare background surfaces for internal and external plasterwork finishes, following the style of the project |
to include:
|
apply the floating coat with a devilled float to accept the final coat (left for a minimum of one week to enable the surface to firm up) |
|
apply the finish coat and finished with a trowel, float, trowel operation to leave a good finish |
|
work on conservation/restoration, repair and conversion projects |
|
construct running moulds for in-situ work |
|
cast from moulds in cement/sand/lime |
|
setting jobs on site |
|
identify differing types of backgrounds |
to include:
|
control the suction of backgrounds |
|
mix materials |
|
protect existing surfaces as work proceeds |
|
replicate traditional plaster finishes internally/externally |
|
understand the principles and methods of setting out jobs on site |
to include:
|
prepare plasters coarse stuff/lime putty/plaster/cement/sands and additives |
|
describe how to prepare surfaces appropriate to plasterwork finish |
|
explain how to apply and finish internal and external plasterwork in one, two & three coat work |
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explain how surfaces are finished to the appropriate style and textured finish of existing |
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describe how to replicate textured finishes from a range of traditional work |
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explain how plasterers coarse stuff for first or pricking up coat on lathing is as below for masonry but gauged 1 – 2.5 by volume |
|
describe how plasterers finish is mixed just prior to use and consists of lime putty and a fine washed sand gauged at approx 1 – 1 by volume. This can also be gauged on the spot board with a small amount of plaster of paris which improves the finish and helps avoid shrinkage cracking |
|
describe what plasterers coarse stuff for first and second coats on masonry and second coat on lathing consists of |
to include:
|
explain how to prepare and mix lime putty |
|
describe how to select sand/aggregates for mixing |
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explain the addition of pozzolanic additives such as brick dust and pulverised fuel ash when using lime putty mixes externally |
|
describe alternative mixes using hydraulic lime instead of lime putty for external areas |
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explain NHL2. 3.5, 5. |
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describe the possible damage to lime plaster on lathing caused by vibrations/movement in structure caused by people working above whilst the material is in the early stages of carbonation |
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explain how to protect existing surfaces |
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explain how to protect flora and fauna |
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explain how to validate ways in which work should be carried out |
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explain how to maintain the main principles of minimum intervention on to the building/structure |
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explain how to select like for like materials |
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explain how to use like for like work techniques to match existing |
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describe how to record and survey work surfaces to be worked on, by photos and written reports |
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describe how to salvage and re-use existing materials |
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describe how to take sections from existing mouldings in-situ |
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describe how to construct running moulds for in-situ work |
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explain how to set up running rules for in-situ work |
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explain how to prepare moulds for cement/lime/sand casting |
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explain mix ratios for cement casting |
to include:
|
describe how to select correct materials for casting |
to include:
|
explain when to use the wet/dry method of cement casting |
wet method:
semi-dry method:
|
explain the difference between restoration/conservation/repair and alteration |
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