IAONZ News
Myth Vs Fact: Overheating in some New Zealand homes is caused by “too much insulation”.
- 9 February 2026
For some reason, people think that insulation creates heat. Not true; insulation is designed to reduce heat flow from hot to cold. Ideal for keeping a house warm in winter, and cool in the summer. Once heat enters your house in summer, there needs to be good methods to remove that heat. Removing insulation is not the answer.
Installing It Right Matters: NZS 4246 and Better-Performing Buildings
- 23 January 2026
NZS 4246 sets the benchmark for installing insulation, so it performs as designed. Correct installation reduces heat loss and energy use in both retrofit and new builds, while supporting safer, healthier, higher-performing buildings as H1 requirements continue to evolve.
Insulation Basics
- 2 March 2022
Most New Zealand homes are under-insulated. Correct insulation installation to NZS 4246 and NZ Building Code H1 is critical - gaps, folds or damp can cut performance by up to 50%. Upgrading ceiling, floor and wall insulation improves warmth, energy efficiency, Healthy Homes compliance, and reduces condensation, mould and respiratory illness.
Significant Building Code update to H1 Energy Efficiency
- 2 December 2021
The Ministry of Business, Innovation and Employment (MBIE) has released the biggest energy efficiency changes to the acceptable solutions and verification methods in more than a decade.
New Residential Tenancy Act provisions
- 15 August 2019
The new Residential Tenancy Act provisions have come into effect from 1 July 2019.
New HHGA standards released
- 2 March 2019
On the 24th Feb 2019 the Ministry for Urban Housing and Development released the new Healthy Homes Guarantee's Act requirements for insulation in rental properties.
Media Release - 21 December 2016
- 23 December 2016
IAONZ encourages landlords to be pro-active as over 50% of assessments don’t meet new Residential Tenancy Act guidelines.
Updated Insulation Industry Standard NZS 4246:2016 released
- 2 September 2016
IAONZ welcomes the release of NZS 4246:2016, noting its active role in the review. The updated Standard supports higher rental insulation requirements and aligns with regulatory changes effective 1 October 2016.
IAONZ is Incorporated
- 18 February 2010
Confirmation that the insulation industry has stepped forward to lift the quality of installation