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All BRANZ Websites 11652
Bringing together building knowledge 4279
Providing research, testing and information for the building and construction industry 
BRANZ Shop 4524
Books, bulletins, seminars, study reports, downloads, details and more... 
Build magazine 213
New Zealand's premier building industry information resource offering impartial expert advice both online and as a hard copy magazine. 
Maintaining my home 1728
Practical advice on how to maintain different parts of your home, and on related issues. 
Maintenance schedules 4
Create a maintenance schedule for a new house, print a copy for the owners, and save a copy for your own files. 
Level 449
The authority on designing and building sustainable homes 
Renovate 319
The technical resource for industry on the renovation of houses from different eras 
Weathertight 98
Building basics for making homes weathertight 
Tools 38
Explore our range of interactive tools and resources 
Privacy policy | BRANZ Maintaining My Home
Privacy policy All information collected through or in connection with is controlled, stored and held by BRANZ Ltd or its web service provider(s) in accordance with the Privacy Act 1993. This Privacy Policy covers our use of information which is collected through or in connection with this Website. We...
Weathertightness resolution | BRANZ Maintaining My Home
Homeowners will usually seek to recover the cost of repairing leaky homes from builders, architects/designers, local councils and others with a role in the original design, construction and consenting of the house or apartment. Processes to do this include those set out in the Weathertight Homes Resolution Services Act 2006....
Weathertightness remediation | BRANZ Maintaining My Home
Weathertightness remediation design MBIE Fixing leaky buildings is a specialist area. Only building surveyors, architects/designers and builders with experience in this area should be involved. An unsatisfactory repair job can lead to the need for further repairs down the track. There are many possible approaches, and homeowners should seek expert...
Maintenance to reduce risk | BRANZ Maintaining My Home
Some weathertightness failures could have been avoided if effective maintenance had been carried out. Most wall claddings, for example, require regular maintenance to ensure that the building remains weathertight. Cleaning and repainting/recoating as required are essential. Some roof claddings also require recoating from time to time. Exterior maintenance includes: ...
Identifying leaks | BRANZ Maintaining My Home
Leaks are difficult to identify and can go unnoticed until damage is severe - obtaining expert advice is recommended where a leak is suspected. Symptoms of a leak can include: staining to external finishes staining or water damage to internal wall finishes or carpets high internal moisture levels mould and...
Design features of leaky homes | BRANZ Maintaining My Home
Design features Enclosed decks and balconies Certain design features and installation techniques have come to be associated with leaky homes. Not all houses that have one or more of these features will be a leaky home, but the risk is increased. These features and techniques include: monolithic cladding such as...
Weathertightness | BRANZ Maintaining My Home
Some homes built in the 1990s and early 2000s had design features and installation techniques that put them at high risk of leaking. Where water got behind the cladding, if it was not removed by drainage or ventilation it could lead to mould and rot. Those houses and apartments where...
Subfloor ventilation | BRANZ Maintaining My Home
The space under a suspended timber-framed floor must be ventilated. A minimum of five air changes per hour should be provided (and double that for wet subfloor spaces). A clear opening area of 3500 mm2 (100 x 35 mm) should be provided for every square metre of floor area. Openings...
Subfloor structure | BRANZ Maintaining My Home
The Canterbury earthquakes have prompted many homeowners to look at what they can do to improve the strength of the foundations of their homes. Depending on the age, structure and condition of a house, work required may involve: replacing missing or corroded fixings and connections adding bracing between piles and...
Subfloor moisture | BRANZ Maintaining My Home
All ground releases water vapour, even when it looks as if it is dry on the surface. On average, 0.4 litres of water can evaporate from 1 m2 of ground in 24 hours - that is 60 litres per day on average for the ground under a 150 m2 house....