Insulation of slab-on-ground floors
Understanding how to maximise the insulation of a slab-on-ground floor is an important step to designing an energy-efficient building. So, where is the main heat loss, and how is a slab best insulated?
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By Ian Cox-Smith – 1 December 2008, Build 109
Understanding how to maximise the insulation of a slab-on-ground floor is an important step to designing an energy-efficient building. So, where is the main heat loss, and how is a slab best insulated?
By Trevor Pringle – 1 December 2011, Build 127
Another change since the Canterbury earthquakes is that all reinforcing in slabs on the ground must now be tied into the foundation wall reinforcing.
By Roger Shelton – 1 June 2013, Build 136
BRANZ has been asked recently for help interpreting NZS 3604:2011 bracing provisions for buildings with suspended subfloor structures. Here are a few pointers.
By Ann Galloway – 1 October 2016, Build 156
There’s a little breathing space, but soon, many rental properties will need to be retrofitted with underfloor insulation. Retrofitting foil insulation has been banned, so what are the options?
By Dr Dave Dowdell – 1 April 2017, Build 159, Feature article
Life cycle assessment is being applied to building materials as part of a major BRANZ study into the resilience of flooring and insulation materials to floods and exposure to water.
By Roger Shelton – 1 June 2019, Build 172
Where is blocking required to stabilise floor joists? We look to NZS 3604:2011 Timber-framed buildings for answers.
By Bruce Sedcole – 1 October 2021, Build 186
From 4 November 2021, there will no longer be an Acceptable Solution in Building Code clause E3 Internal moisture for using timber or timber based products as linings and finishes to floors in wet areas. However, an Alternative Solution designed and specified to best practice is easy to do.
By Guy Marriage – 1 December 2022, Build 193
Part 2 of this Build series on designing and building medium-density housing covers inter-tenancy floors. The most important consideration here is to eliminate penetrations into the inter-tenancy floor zone.
By Ian Cox-Smith – 1 June 2007, Build 100
BRANZ has been researching how to improve the insulation of concrete slab-on-ground floors and has found an alternative method which is practical and improves performance.
By Andrew Bedford – 1 October 2022, Build 192
From 1 May 2023, housing and small buildings up to 300 m² will need to be better insulated. What does this mean in practice for wall, underfloor and ceiling insulation of these buildings when using the schedule method for compliance?