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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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?
Readers have asked about bracing requirements in two extra situations, so tom edhouse outlines the rules. First up are discontinuous floors or ceilings.
BRANZ has been asked recently for help interpreting NZS 3604:2011 bracing provisions for buildings with suspended subfloor structures. Here are a few pointers.
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?
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.
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.
As the levels of insulation for walls, roof and windows increase, heat loss through the floor, particularly suspended timber floors, becomes more significant. What are the options to insulate these?
The BRANZ House insulation guide details the expected thermal performance for common construction options. It didn’t include the thermal performance of floor slab systems with polystyrene pods, but recent modelling means this data is now available.
Our rule of thumb series provides designers with information on aspects of design that have potential to reduce the carbon footprint of new builds. What should designers consider when applying rule of thumb 2 Expose the concrete floor slab?
The BRANZ Technical Helpline often receives queries for designing and building suspended timber floors and dealing with uplift. Nine of the most common questions are answered here.