Keeping skillion roofs dry
For most skillion roofs the amount of air movement in the roof cavity, although limited, is sufficient to remove small amounts of vapour. The trick is to keep those amounts of water vapour small.
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The gen on green roofs
By Alide Elkink – 1 June 2017, Build 160
They deliver substantial environmental gains, so while New Zealand is slow to jump on the green roof bandwagon, there’s reason to think this will change.
Bracing for monopitch roofs
By Alide Elkink – 1 December 2014, Build 145
Judging by the number of calls to the BRANZ Helpline, there’s some confusion around bracing requirements for monopitch roofs. Here, we sort out the issue.
Bracing light timber-framed roofs
By Tony Conder – 1 December 2004, Build 85
Roof bracing is one element in a continuum that provides resistance to horizontal loads. It works with the wall and foundation bracing to supply a total bracing package for a building.
Green roofs worth their weight in gold
By Rachel Hargreaves – 1 October 2006, Build 96, Feature article
Green roofs are slowly breaking into the New Zealand market. Some of the issues and cost benefits are discussed here.
Don't be cool about warm roofs
By Alide Elkink – 1 August 2017, Build 161
While they may be more expensive to install, the popularity of warm roofs is growing as they are more thermally efficient, resulting in lower energy costs.
Cold roofs? Warm roofs?
By Stephan Rupp – 1 February 2018, Build 164
What’s the main difference between roof construction options? BRANZ explains the science to help you design better roofs.
Installation of roofing underlay
By Alide Elkink – 1 June 2007, Build 100
Underlay is an essential part of roofing installation, but there still appears to be some uncertainty about its use and installation.
BRANZ weathertightness poster
1 October 2003, Build 78
In the August/September 2002 edition of Build you would have received the BRANZ weathertightness poster. This column takes a detail from the poster and provides a ‘good practice’ solution to it.
Membranes for low-slope roofs
By Alide Elkink – 1 April 2017, Build 159
Building consent authorities are finding roofing systems specified for low-slope roofs that are unsuitable for the expected traffic use. What membranes can be used on roofs with regular maintenance foot traffic?
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