Plastering Specification
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 Plastering Specification 



• Our Services
• Inspections
• Damp Proofing
  - Plastering Specifications
  - General Preparation
  - Renovating Plaster
  - Waterproofing Liquid
  - Dry Lining Methods
  - Render Additives
  - Tanking
  - Product Data

• Timber Treatment
• Condensation Cures
• Cellar Conversion

1. Post Treatment Plastering Specifications

Following specialist treatments, it is usually necessary to renew the wall plaster to a suitable post treatment plastering specification. Should you have any questions about this, either now or in the future, please do not hesitate to contact us. This renewal of plaster is essential at some time during the life of the guarantee and you will not normally get the full benefit of the system until this plaster renewal is carried out.

The choice of an individual specification for each contract is a matter of judgement requiring careful assessment of substrate suitability, moisture levels, salt contamination and the likelihood of future problems of condensation. If any doubt exists further guidance can be obtained from us.

We recommend that all specialist work be carried out by one contractor. However, if you are instructing your own plasterer the work must be done to this specification. The information contained in this sheet is for professional operators and is compiled accordingly. Further information is available on request.

1. Remove all skirtings, architraves and other joinery.

2. Remove radiators and any other fixtures or fittings within the work area.

3. Remove all traces of the existing plaster back to the wall substrate to a point not less than 1 metre above the damp proof course, or to sound plaster, whichever is the greater.

4. Rake out masonry joints and ensure all traces of gypsum, dust or other friable material are removed along with any timber noggins or fixings.

5. Use only clean potable water and clean uncontaminated washed sharp/rendering sand and fresh Portland cement.

6. An approved salt retarding additive must be mixed with the gauging water before use.

7. Apply a first scratch coat of 3 parts washed sharp/rendering sand to one part fresh OPC, incorporating an approved salt retarding additive in the gauging water.

8. Apply a full coat of the same mix, while the scratch coat is still “green”, combed to provide a key for the second coat and giving an overall thickness of not less than 3/8th inch or 10mm. Ensure that this is stopped a minimum of ½” or 15mm above the floor.

9. Once this coat has cured, apply a full second coat ½” (12mm) thick to a mix of four parts sharp/rendering sand to one part OPC, using a minimum of the gauging solution to give a dense coat. Ensure that this coat is stopped at least 1” or 25mm above the floor.

10. Leave for at least twenty-four hours to cure before finishing with a 1/8” (3mm) of multi-finish or similar. This must not be overtrowelled and must be stopped at least 1” (25mm) above the floor.

11. Skirtings must be treated with an approved preservative and primed on the back before being re-fixed.

12. Redecoration should be regarded as being temporary until the wall has dried out. Initial redecoration can be carried out using a water based emulsion paint after the new plaster has visibly dried out. Permanent redecoration should be delayed for at six to twelve months.

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Inspections Damp Proofing Timber Treatment Condensation Cures Cellar Conversion
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We are experts in timber treatment, condensation cures, damp proofing and cellar conversions. We work in London and throughout the Home Counties area, mainly in Essex and Hertfordshire. We are a well-established family firm, and have built our business on our good reputation. Our work is carried out by our own staff and is usually backed by a long-term insurance-backed guarantee.   Dry Rot [Serpula lacrymans] causes extensive damage and should be thoroughly dealt with as soon as it is found. It needs an initial source of moisture but it can then spread to attack adjacent dry wood and can travel through masonry.   RegencyHDT
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