By Greg Burn
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1 June 2022, Build 190
BRANZ modelling identified six areas for designers to focus on to reduce the carbon footprint of a new build. In the first of this series, we look at the practical considerations for designers using rule of thumb 1 Increase construction R-values.
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By Jonquil Brooks
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1 April 2022, Build 189
BRANZ is currently updating the House insulation guide to align with the new requirements of the 5th edition of Building Code clause H1 Energy efficiency.
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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 Stephan Rupp, Dr Manfred Plagmann
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1 October 2020, Build 180, Feature article
BRANZ was called into a Dunedin school where too much ventilation caused excessive condensation in a large roof space. Understanding why this happened points to warm roofs being better in some locations.
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By Roland Alderton, Mike Way
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1 October 2020, Build 180, Feature article
Ventilation of cold roof designs in New Zealand doesn’t always go smoothly. Here, BRANZ physicists hand over to a couple of professional builders who have long been at the coalface dealing with roof moisture issues on their projects.
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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 Nick Brunsdon
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1 December 2017, Build 163
Designers and builders enjoy a broad and ever-increasing range of cladding options for walls and roofs. While appearance is a prime consideration, it is useful to consider the upfront and lifetime costs.
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By Dr Manfred Plagmann
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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.
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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 Alide Elkink
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1 December 2015, Build 151
Collecting rainwater for drinking can be practical, money saving and sometimes necessary. For safety’s sake, though, it’s important to have the correct set-up that is regularly maintained.
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