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What’s the main difference between roof construction options? BRANZ explains the science to help you design better roofs.
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Solar potential of schools
By Zhi Jian (David) Wong and Hugh Byrd – 1 October 2011, Build 126
An energy audit at Remuera Intermediate School also investigated the potential of photovoltaics to give the school an independent energy supply and income from feeding surplus electricity into the grid.
Code changes
1 October 2011, Build 126
Changes to key Building Code documents dealing with building structure (B1) and weathertightness (E2) came into effect on 1 August 2011.
Retrofitting to resist extreme wind
By Graeme Beattie – 1 August 2008, Build 107
Strong wind causes damage to houses, particularly their roofs. A recent BRANZ study started by defining ‘extreme winds’ before developing retrofit solutions to ensure roofs on older houses are adequately secured.
The power of suburbia
By Anna Ho and Hugh Byrd – 1 April 2013, Build 135
New research suggests installing photovoltaics on roofs and driving electric cars could transform low-density suburbia from a high-energy consumer to an energy provider for the city.
House performance in the Canterbury earthquake
By Andrew Buchanan and Michael Newcombe – 1 December 2010, Build 121
How did residential houses (mainly single-storey and 2-storey houses) perform in the magnitude 7.1 Darfield earthquake on 4 September 2010? Here are some observations from those on the ground in the early days after the major earthquake.
Roofing underlay and moisture
By Malcolm Cunningham, Luca Quaglia – 1 October 2010, Build 120
A recently completed major BRANZ research project has improved understanding of how roofing underlays handle moisture in roofs and led to the development of a new test suitable for a wider range of roofing underlays.
Energy efficiency and historic buildings
By Christina Newnham – 1 August 2009, Build 113
If you live in an historic home, any energy efficiency improvements need to be in keeping with the character of the house.
Limiting fire spread in buildings
By Dr Colleen Wade – 1 February 2014, Build 140
A new BRANZ research project is looking to improve the methods of determining the level of fire resistance necessary in parts of buildings to limit fire spread.
Earth buildings
By Nigel Isaacs – 1 October 2006, Build 96
Earth is truly the ubiquitous building material, making earth buildings seem an obvious option for early settlers. However, its use was limited.
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