Installing insulation

Use a trained professional to install or upgrade your insulation, as even small installation faults can affect its performance or create safety hazards.

Having a professional install insulation

Professional installers buy insulation in bulk so they may be able to supply and install your insulation for about the same as it would cost you to buy it in a hardware store. We recommend you get more than one quote so you can compare prices.

We recommend using a trained professional installer who:

  • works to the New Zealand insulation installation Standard NZS 4246:2016.
  • has completed the insulation installer training of the Insulation Association of New Zealand (IAONZ).

Enter your region in the search box below to find a list of insulation installers on

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Installing insulation yourself

If you’re considering the DIY approach, everything you need to know about installing insulation is in the New Zealand Standard NZS 4246:2016 Installing insulation in residential buildings. It's easy to follow with lots of colour pictures, and it's free to download.

As with all DIY projects, there are safety considerations. Make sure you read and follow the Health and Safety advice in Appendix B. If you're not sure, get a professional to install the insulation for you.

 New Zealand Standard for installing insulation (NZS 4246:2016)

 Installing ceiling insulation

 Installing underfloor insulation

 Installing wall insulation