By Nicole Allen
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1 August 2022, Build 191
A local volcanic eruption is a substantial risk to the Auckland region. Research into the impact of multiple volcanic hazards on the roofs of buildings showed that they generally deal well with volcanic ash and flying rocks landing on them.
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By Alide Elkink
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1 August 2022, Build 191
Roof construction R-values will increase to R6.6 when New Zealand Building Code Acceptable Solution H1/AS1 5th edition becomes mandatory on 1 May 2023 (6 months later than first announced). Have you thought about how you will deal with these changes in your designs?
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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 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 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 Trevor Pringle
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1 February 2020, Build 176
Proper on-site management of roof cladding is critical to delivering quality buildings. This is the final in a series on materials storage requirements and outlines how to store and handle roof claddings.
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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 Trevor Pringle
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1 February 2019, Build 170
A very tricky roof-to-wall junction detail occurs at the top and bottom junctions of a monopitch dormer roof. Here is one option that, if built correctly, will be weathertight and look good.
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By Alide Elkink
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1 October 2018, Build 168
Considering wind uplift should be top of mind when replacing a heavy roof with a lighter one, NZS 3604:2011 Timber-framed buildings outlines the necessary top plate connections.
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