Search results for 'roofs'

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Passive roof ventilation

By Stephan Rupp 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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School indoor moisture

By Stephan Rupp, Cara Askew 1 February 2017, Build 158, Feature article

BRANZ has been measuring moisture levels in a school’s classrooms. This information is providing a sound basis for understanding the indoor climate and designing moisture-safe long-span roofs in schools.

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Speaking from experience

By Roland Alderton, Mike Way 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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Maintenance insights

By Vicki White 1 June 2017, Build 160, Feature article

Independent assessors carrying out the 2015/16 BRANZ House Condition Survey rated one-fifth of our housing stock as poorly maintained. Where are the problems areas, and why is maintenance being deferred?

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Aggravated thermal bridging

By Malcolm Cunningham 1 December 2011, Build 127, Feature article

Recently, several cases of an insidious new form of thermal bridging have been seen. Aggravating factors have been identified that contributed to the problem, so there are now lessons to be learnt to avoid this on other buildings.

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