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BBA approved Newton 805 Newlath used to treat damp in an outbuilding in this stunning 19th century castle, so it could be converted into a cafe. Newton damp proof membranes meet strict criteria for waterproofing listed buildings.

The Project

Penrhyn Castle is an enormous 19th century castle in Snowdonia, North Wales is in neo-Norman style, and is one of the most admired of the numerous mock castles built in the United Kingdom in the 19th Century. As a National Trust property, it requires extensive facilities for visitors. The walls in this outbuilding were affected by penetrating damp and had structurally degraded.

A former garage, originally the Castle brewery, was being transformed into a new courtyard cafe. The brickwork was very affected by penetrating damp ingress and structurally degraded, and a damp proofing solution was required. The damp proofing system needed to be acceptable for use in this historic building and meet strict requirements.

The Solution

To bring the outbuilding into a condition suitable for plastering would have entailed a lot of messy, noisy and disruptive work (needle gun, bush hammer, scabbler or cup brush etc.) – and still would have had a damp problem to deal with. Dry lining was not an option as The National Trust did not want the very straight lines of plasterboard as they wanted to retain an appearance in keeping with the original lime plasterwork.

Newton 805 Newlath damp proof membrane was installed to the affected walls in the castle and finished with a plastered universal one coat plaster (in a 3 coat undulating build-up) which ticked all the boxes and produced a strong, dry and authentic looking wall finish which met all the client’s requirements.

The Result

  • New finishes are guaranteed to be protected from the penetrating damp
  • Aesthetically the undulating nature of the walls was retained
  • Newton 805 Newlath is sympathetic to the structure which conformed to The National Trust’s strict requirements
  • The treatment is reversible so the wall can be returned to its original state if required in the future.

Newton 805 Newlath is ideal for damp proofing historic buildings and it has been used in many historic properties in the past including the Houses of Parliament and Windsor Castle.

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Our staff are able to provide guidance for projects of all sizes, whether you require some general advice about damp or waterproofing, or support with technical drawings and specifications.

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