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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Modelling of concrete floor slabs at BRANZ has provided insights into how to optimise the effectiveness of exterior perimeter edge insulation.
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.
Ventilation systems in New Zealand homes rarely have their airflows measured and adjusted during installation, resulting in poorly ventilated rooms. Using active flow hoods during commissioning could change this.
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?
Sufficient ventilation is crucial as our homes become more airtight. A mix of passive and mechanical options can work well, but all designs should start by getting the source extraction measures right.
Going higher may help to provide much-needed housing, but there are concerns about how to demonstrate compliance when the guidance is often limited to buildings up to 3 storeys.
BRANZ’s new Warmer, Drier, Healthier Buildings programme is taking a holistic and collaborative approach to explore the issues and find solutions that allow buildings to be warm, dry and healthy.
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.
BRANZ scientists have firm connections with their international peers, collaborating on joint building science projects and ensuring New Zealand has access to the latest and best information.
BRANZ physicists have developed a useful calculation for designers to work out the minimum number and area of vents required in roof spaces.