By Stephan Rupp
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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.
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By Martin Connell
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1 August 2021, Build 185
Brick gable-ended roofs should be diagonally braced to prevent out-of-plane movement in an earthquake. It could make the difference between a home that remains liveable and one that does not.
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By Catherine Nicholson, Anna Walsh, David Carradine
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1 October 2020, Build 180
To simplify the consenting process for structural insulated panels (SIPs), we need to know how they perform locally. A BRANZ research project is helping by examining SIP durability, earthquake and fire performance.
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By Stephan Rupp, Zhengwei Li
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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.
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By Stephan Rupp
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1 February 2016, Build 152, Feature article
Twenty years ago, roofs didn’t need to be specifically ventilated. Today, things are different. That’s because 21st century homes are more airtight, and if they aren’t aired, condensation may form.
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By Dr Manfred Plagmann, Stephan Rupp
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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.
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By Nigel Isaacs
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1 October 2012, Build 132
Prone to earthquakes and with abundant native timber, New Zealand was quick to adopt timber as a building cladding. It could even replicate stone with design elements such as quoins.
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By Graeme Beattie, Roger Shelton, Stuart Thurston, Angela Liu
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1 April 2011, Build 123, Feature article
The 6.3 magnitude earthquake that struck Christchurch on 22 February 2011 and the many aftershocks have been an enormous test of the performance of buildings. BRANZ Structural engineers provide some initial thoughts on how houses performed.
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By David Bullock
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1 February 2009, Build 110, Feature article
A flashing is a folded length of metal that provides a weathertight cover at junctions in and between walls and roofs. Getting them right is a good start towards constructing a weathertight building.
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By Ian Page
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1 December 2008, Build 109, Feature article
The building materials used in roof and wall claddings continue to change over time. What are the current trends?
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