Green roofs are slowly breaking into the New Zealand market. Some of the issues and cost benefits are discussed here.
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Earth is truly the ubiquitous building material, making earth buildings seem an obvious option for early settlers. However, its use was limited.
As with many building inventions, corrugated iron traces its origins back to the coming together of the right raw material, idea and machinery.
There is enough information around to make sensible judgements about cladding details as long as you keep four key principles in mind. With these in place, whatever the design, your cladding should be weathertight.
A recent trip to North America provided opportunities for further refining the BRANZ moisture research programme. Some of the papers presented at a building physics conference are highlighted here.