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New build structural waterproofing and listed building refurbishment project in Wandsworth, London SW18
This is the development of twelve new-build luxury town houses with basement waterproofing systems for Berkley Homes and the renovation and conversion of an existing three storey Grade II Listed school into apartments . The single skin brick school building had been derelict with defective pointing and as a consequence had lateral penetration of moisture across all elevations rendering it uninhabitable. 


The new-build town houses are built over four stories and to maximise the available space have been built with extensive basements housing kitchen, study, utility and downstairs bathroom together with storage space. To overcome any likelihood of water penetration, John Newton’s Newton 520 20mm stud membrane was applied to the floor areas of all 12 basements with Kingspan insulation board and a 50mm screed, thus complying with Type L regulations regarding the insulating of new buildings.

Cavity Drain Membrane was applied to damp walls creating a damp proof barrier with built in bonded mesh ready to accept render.

Part of the development incorporates an old school building which is Grade II listed and has been turned into flats and maisonettes. The building suffered from penetrating damp to the external brickwork on three levels. As it is a listed building, the facade could not be touched.

The insulating board attaches to Newlath 2000 using dot and dab compound.

  Newton 520 was applied to the damp floor with covering of Insulation Board.

As a Newton Specialist Contractor we suggested the use of John Newton’s Newlath 2000 damp proof membrane to the Berkeley Homes architects as an effective and quick method of providing a damp barrier against dampness and abounding vapour above ground level A dot and dab compound was then applied to accommodate insulated drylining board and a skim finish. This technique of damp proofing is deemed as removable for listed buildings and negates the need of introducing unwanted chemicals into the construction, it can also be applied quickly.

This contract was in excess of 2500sqm of membrane successfully installed. As an approved Newton contractor we provided the client with a professional solution, which can also be guaranteed. 


This case study has been submitted by a member and the British Structural Waterproofing Association accepts no responsibility for its content. 

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