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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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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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