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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.
Updated Changes to H1 | NZ Building Code
- 27 November 2025
The Ministry of Business, Innovation and Employment (MBIE) updated the settings in November 2025 - for compliance with the energy efficiency requirements of clause H1 of the Building Code.
Warmer Kiwi Homes - 2025 programme expansion
- 5 August 2025
In 2025, EECA expanded the Warmer Kiwi Homes insulation grants to another 300,000 eligible homes.
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.
Home - owners urged to take care this weekend with underfloor foil insulation
- 1 February 2021
The Insulation Association of New Zealand (IAONZ) has long been concerned about the dangers posed by foil insulation products. With the Waitangi long weekend and holiday DIY period coming up, homeowners need to take extreme caution around repair or removal of this product.
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.
IAONZ gravely concerned about number of rental properties to be insulated
- 2 November 2017
IAONZ gravely concerned about number of rental properties yet to be insulated
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.
Prestigious science prize awarded to housing champion (NZ Herald)
- 3 December 2014
A researcher's tireless efforts to ensure every Kiwi can have a safe, warm and dry home has been rewarded with the country's largest prize for science.
IAONZ is Incorporated
- 18 February 2010
Confirmation that the insulation industry has stepped forward to lift the quality of installation