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The Ventilated Plaster Lath System
When surveying an older property and specifying the
Our approach is to line the walls with a ventilated lath incorporating a mesh stud profile, which can be finished with lime mortar, light weight plaster, plasterboard or timber wainscoting if required.
The system has been in use since the 1940s. It was introduced to this country by John Newton and Co.
John Newton used to supply hair to the lime market until the late 1930s. He then introduced the Newtonite Lath damp proofing wall lining system to the building market. It was used extensively in all manner of buildings and has proved extremely successful at protecting finishes from the effects of damp, without affecting the building’s structure.
The Newtonite Lath has since been superseded by Newlath Ventilated Plaster Lath.
The lining is detailed so that it is ventilated and moisture can evaporate from the wall surface, although it is unlikely to in the modern sealed and heated house environment.
If the walls are dry lined or plaster boarded the minimal number of fixings can be used. Therefore, there is minimal damage to finishes behind the system. It can be fixed over existing sound finishes and detailed around/up to architectural features.
The Newlath is not installed to remove or cure damp. It is a lining system which when fixed to the wall protects plaster and decorated finishes from the damp in the walls. It does not cause moisture to move into other areas because it is ventilated. It does create a warmer, dry environment in the property without affecting the way the wall works.
Externally, unsound/defective cement renders should be removed and, where applicable, renewed with a lime render.
Removal of sound, watertight cement render can often cause damage to the underlying substrate and this
should be given due consideration before proceeding with any render removal.
II. Installing a damp proof course which is not suitable for buildings built without a damp proof course and is never effective in thick masonry walls.
III. Applying a lime mortar render which would have to be treated as possibly sacrificial, as it is likely to become damp and stained if the cause of the damp has not been cured.
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Building Lime Company | Tel: 01794 884294