From the mid-1990s to around 2005, thousands of New Zealand homes were constructed with designs, details, materials and methods that resulted in leaks. Where rainwater couldn’t drain away, it frequently led to damage in the wall assemblies.
BRANZ research has found that problems with weathertightness still exist in some new buildings today.
Resources for designers and builders
When building a new home, it is up to designers, builders and engineers to ensure that it is weathertight. BRANZ provides information in many different formats about designing and constructing weathertight homes.
Services for manufacturers and distributors
BRANZ can evaluate the weathertightness of different construction systems and building materials through laboratory-based and on-site tests of air permeability, watertightness and wind resistance.