To identify existing and future potential water ingress. We have extensive experience in assessing and reporting on weathertight defects to determine the extent and cause of water ingress, the extent of any damage caused to the structure by the water ingress and the scope of the remedial work required to repair the defects and damage.
Reveal’s directors are Certified Weathertightness Surveyors by the New Zealand Institute of Building Surveyors (NZIBS).
All buildings are potentially at risk of weather-tightness failure, regardless of the building’s age, structure or cladding type. A typical NZ ‘leaky building’ is generally understood as a building with monolithic (plaster) cladding where water has penetrated a timber-framed building’s cladding system, leading to elevated moisture levels in the building’s timber framing, promoting the growth of mould and fungus, which can lead to decay of the timber framing and the growth of toxigenic mould.
Water does not have to be dripping from the ceiling or pooling on the floor for a building to be ‘leaky’. Most leaky buildings do not show any signs of water ingress (for example mould or water stains) inside or outside the building. The damage goes on unseen inside the walls.
Many factors influence a building’s weather-tightness risk, including:
We are specialists in surveying buildings for weathertightness failure and designing and overseeing repairs. We frequently give evidence in high court claims for weathertightness defects, for both owners and defendants. We employ methodical forensic techniques to building investigations to ensure we are certain of the defects causing the water ingress and damage, and that the scope of repair specified will fix the defects and damage.
Weathertightness refers to the weatherproof resistance of a building to the natural weather elements. In New Zealand, the issue of building weathertightness (or ‘leaky building syndrome’) has affected many houses where the poor design and use of building materials resulted in severe building damage. The problem occurs when water and moisture penetrate the building, accumulating behind the cladding. The water build-up is prevented from evaporating, providing a perfect environment for mould to grow, and eventually rotting the timber framing.
The mould also presents a health risk to occupants. Untreated timber framing is especially susceptible to rot and was commonly used as framing in residential houses built during the early 1990’s.
The evidence of the last fifteen to twenty years of the NZ construction industry’s mistakes leads us to one fundamental conclusion: It is better to try and get it right first time rather than re-visit the mistakes later at considerable cost to building owners, tenants, designers, contractors, sub-contractors, councils, government, insurers and lenders.