Roof space moisture
Recent BRANZ research has confirmed how moisture gets into roof spaces and highlighted the critical role ventilation has in removing it.
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By Dr Manfred Plagmann, Stephan Rupp – 1 December 2015, Build 151, Feature article
Recent BRANZ research has confirmed how moisture gets into roof spaces and highlighted the critical role ventilation has in removing it.
By Stephan Rupp, Dr Manfred Plagmann – 1 June 2020, Build 178
BRANZ went into the field to solve the problem of a failed roof cavity in a new build in Tauranga. Because of the parapet design, a novel approach was taken that used a solar fan to ventilate the cavity.
By Graeme Beattie – 1 August 2008, Build 107
Strong wind causes damage to houses, particularly their roofs. A recent BRANZ study started by defining ‘extreme winds’ before developing retrofit solutions to ensure roofs on older houses are adequately secured.
By Stephan Rupp – 1 December 2021, Build 187
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.
By Dr Manfred Plagmann – 1 December 2016, Build 157, Feature article
BRANZ physicists have developed a useful calculation for designers to work out the minimum number and area of vents required in roof spaces.
By Sunil Bura, Mike Duke, Tim Anderson and Mark Lay – 1 April 2008, Build 105
A new solar collector system, being developed at the University of Waikato, integrates neatly into standard roofing iron and can generate both electricity and heat.
By Stephan Rupp – 1 February 2018, Build 164
What’s the main difference between roof construction options? BRANZ explains the science to help you design better roofs.
By Stephan Rupp, Zhengwei Li – 1 April 2019, Build 171
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.