Cold roofs? Warm roofs?
What’s the main difference between roof construction options? BRANZ explains the science to help you design better roofs.
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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.
By Alide Elkink – 1 December 2008, Build 109, Feature article
Given the many design and statutory requirements for roofing, and the large range of claddings available in today’s market, how do we select the right roofing for a building?
By Alide Elkink – 1 August 2022, Build 191
Roof construction R-values will increase to R6.6 when New Zealand Building Code Acceptable Solution H1/AS1 5th edition becomes mandatory on 1 May 2023 (6 months later than first announced). Have you thought about how you will deal with these changes in your designs?
By Roger Shelton – 1 June 2008, Build 106
The area around the edge of a roof requires extra fixings to stop it lifting, but how much of the total roof area needs these extra fixings?
By Trevor Pringle – 1 August 2013, Build 137, Feature article
Specifying and detailing a roof, deck or basement waterproofing membrane is not an area to cut corners.
By Greg Burn – 1 October 2009, Build 114
The roof on a new building needs to be more than just aesthetically appealing and able to keep the building weathertight – it must also effectively collect and dispose of rainwater.
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.
By Tom Edhouse – 1 August 2009, Build 113
Designers should be designing roofs with enough space between the roof underlay and top plate for the thicker ceiling insulation now commonly used. Here are some options to avoid getting caught short.
By Nicole Allen – 1 August 2022, Build 191
A local volcanic eruption is a substantial risk to the Auckland region. Research into the impact of multiple volcanic hazards on the roofs of buildings showed that they generally deal well with volcanic ash and flying rocks landing on them.
By Stephen Sargent – 1 April 2007, Build 99
A wall or roof underlay is very different from a vapour barrier. One lets moisture through and out of a building and the other doesn’t. Using the wrong one will trap moisture where you don’t want it.