What makes weatherboards weathertight?
A detailed study of water leakage through 14 walls clad with weatherboards sheds some light on the origin of leaks.
Walls
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Wall underlay installation
By Greg Burn – 1 August 2009, Build 113
Wall underlay plays an important role in the weathertightness of exterior wall assemblies in light timber-framed residential buildings, yet often it is poorly installed. Getting it right can be as simple as 1, 2, 3.
Weatherproofing concrete block walls
By Alide Elkink – 1 June 2010, Build 118
A waterproof coating is essential to maintain the weathertightness of single skin concrete block walls since concrete masonry, and particularly the mortar joints, have little resistance to water penetration.
The hip ridge detail
By Tony Conder – 1 August 2003, Build 77
Here’s a simple way to make your ridge junctions neat and tidy.
Supply chain affects materials choice
By Matthew Curtis – 1 April 2022, Build 189, Feature article
The last year has been an interesting one for market share of building materials as changing preferences and availability issues due to supply chain constraints influence market share.
Lintels under gable ends
By Roger Shelton – 1 December 2018, Build 169
At BRANZ, we often get asked if it’s necessary to have a lintel over an opening in a wall under a gable end where the gable framing may be able to span the opening without support from the lintel. Here’s our advice.
Bracing blocks and wings
By Trevor Pringle – 1 December 2018, Build 169
More complex building designs may include wings with shared walls that have extra considerations for bracing demand.
Locating walls
By Trevor Pringle – 1 June 2015, Build 148
Here, we use drawings to explain the specific parameters for the location of loadbearing or braced walls for suspended timber floors.
It’s not worth the risk
By Trevor Pringle – 1 June 2018, Build 166
The weather’s not good but the job needs finishing. Is it worth the builder taking a risk and using a flexible wall underlay as temporary weather protection to carry on with work that needs to be kept dry? BRANZ has no doubt that the answer is no.
High-performance domestic walls
By David Hindley – 1 February 2021, Build 182
Wall design will play a key role in the improved thermal performance of new houses as we move toward net-zero carbon construction. One recent research project found problems with current wall construction, but another developed high-performance details that take us a leap ahead.
