Head flashing for window with bevel-back and cavity
E2/AS1 and WANZ WIS offer two different solutions to window head flashing details with bevelback weatherboard cladding installed over a drained and ventilated cavity. What are the differences?
Cavity wall construction
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Weathertightness and brick veneer cavities
By Trevor Pringle – 1 October 2008, Build 108
Brick veneer cavities have an important weathertightness function. Getting the detailing and construction of veneer claddings right is necessary to allow the water present to drain and dry.
WANZ WIS – drained cavity and openings
By Greg Burn – 1 April 2009, Build 111
The Window Association of New Zealand has developed an Alternative Solution to the details in E2/AS1. Known as the WANZ WIS details, we look at how it works and what to watch out for.
H3.1 cavity battens
By Alide Elkink – 1 December 2014, Build 145
As with all timber uses, it’s important to select the right treatment for cavity battens.
Managing air-pressure differences
By John Harper – 1 August 2004, Build 83
In this series of articles on window/door installation, we’ve focused separately on heads, sills and jambs. Air-pressure management deals with the whole frame.
Closing the top of ventilated cavities
By Tom Edhouse – 1 February 2014, Build 140
Good detailing at the soffit to wall framing junction is important to prevent moist air from cavities getting into the ceiling where it can cause problems.
Inter-tenancy fire separation for cladding cavities
By Russell Black – 1 April 2004, Build 81
We received a query relating to smoke and fire spread in cavities arising from an earlier article on cavity battens. This article widens the discussion to address fire issues in relation to inter-tenancy boundaries.
The science behind details
By Stephen McNeil – 1 December 2016, Build 157, Feature article
Have you ever wondered why we detail or construct buildings the way we do? Many of the actions we take may seem second nature, but there is a great deal of science behind the basic details.
Keeping subfloor air out of cavities
By Alide Elkink – 1 February 2018, Build 164
When a building has a suspended timber floor, it’s a requirement of E2/AS1 to stop subfloor air from entering the drained cavity. The Building Code doesn’t say how to do this, but we have an option.
C is for cavities
By Trevor Pringle – 1 December 2016, Build 157, Feature article
It’s a simple solution, but installing cavities behind wall claddings solved the problem of trapped moisture and the damage this caused. Now, extensive research has quantified exactly why cavities work.
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