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?
Reflective foil insulation products are commonly labelled with a component R-value. This does not signify performance, and should not be confused with the R-values for bulk insulation products.
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?
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.
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.
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?
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.