BRANZ Maps, a free online geographic information system (GIS) with information on New Zealand addresses, is now even more useful. You can access it from any mobile device to check wind zones and much more.
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A recent caller to the BRANZ helpline scratched the surface of a problem that sometimes crops up on building sites – differing views on best practice for material compatibility.
BRANZ’s timber structures durability work has seen sawn sapwood and heartwood timber exposed to the weather in various locations. The next stage is applying knowledge gained to engineered wood-based materials.
BRANZ research is filling the knowledge gap in how geothermal corrosion affects typical building materials. This will lead to guidance for the design, construction and maintenance of buildings in geothermal areas.
Possible health hazards associated with chemicals in CCA preservatives for treated timber have led to revised Codes of use in some countries. New research by BRANZ into the durability of galvanised steel shows work still needs to be done on reducing the corrosivity of preservative-treated timbers.
Every good rocker knows that ‘rust never sleeps’, but how much does corrosion cost the country, and how can this be reduced?
In the 2011 version of NZS 3604, some changes have been made to the corrosion map, mainly with the atmospheric corrosivity classification system.
In response to industry questions, BRANZ recently launched a research project into corrosion rates in vented roof spaces. Two roof spaces have been built in an unforgiving coastal environment and will be monitored.
Although timber treatments protect timber, they can corrode nails, screws and other hardware used in building. A BRANZ research project is investigating the effects of different treatments on some common types of metal fasteners.
BRANZ research has provided reassuring results for those wanting to add passive ventilation in roof cavities to counter condensation. Corrosion of metal fixings inside the roof space remains low, even in extreme marine environments.
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