Edge insulation of slabs
Modelling of concrete floor slabs at BRANZ has provided insights into how to optimise the effectiveness of exterior perimeter edge insulation.
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By Ian Cox-Smith – 1 December 2016, Build 157
Modelling of concrete floor slabs at BRANZ has provided insights into how to optimise the effectiveness of exterior perimeter edge insulation.
By Stephen McNeil – 1 August 2021, Build 185, Feature article
As we push for higher performance from our houses, expectations for airtightness and ventilation are changing rapidly. Some changes will be needed in design to improve airtightness, and mechanical ventilation is likely to soon be the norm.
By Mark Bassett – 1 December 2008, Build 109, Feature article
A detailed study of water leakage through 14 walls clad with weatherboards sheds some light on the origin of leaks.
By Stephen McNeil, Dr Manfred Plagmann – 1 October 2019, Build 174
Blower door tests are used to identify air leaks and reduce air infiltration into a house. However, estimating the air infiltration rate – and therefore energy loss – is not as straightforward as many assume. Knowing the physics will help understand why.
By Stephen McNeil – 1 August 2021, Build 185, Feature article
To get better thermal performance in new homes, designers should look at details such as junctions and penetrations with the use of readily available calculation tools for whole-of-building assessments.
By Ian Cox-Smith – 1 October 2013, Build 138
The BRANZ helpline regularly gets asked whether to include garages in a building’s thermal envelope and which parts should be insulated. Each situation is different, but to help answer these questions, BRANZ has carried out some thermal modelling.
By Ian Cox-Smith – 1 December 2015, Build 151
Heating costs could be cut if we do as Americans and Europeans do and add perimeter edge insulation to heated concrete floor slabs.
By Ian Cox-Smith – 1 April 2016, Build 153
Ventilation is required to reduce moisture levels, but can too much subfloor ventilation reduce the effectiveness of underfloor insulation? BRANZ set out to find the answer.
By Greg Overton – 1 August 2016, Build 155, Feature article
For low-rise buildings, E2/VM1 can be used to demonstrate that a cavity-based wall system can meet the requirements of E2. But what is E2/VM1, and why might it not be suitable for medium-rise buildings?
By Nick Helm – 1 October 2018, Build 168, Feature article
Kiwibuild aims to resurrect the dream of home ownership for many Kiwis, but how will it work?