Insulation for warmer, drier, healthier environments

Read more

What is GreenStuf®?

GreenStuf® is a thermal and acoustic insulation made from 100% polyester fibre, with a minimum of 50% recycled content. Made on a zero waste manufacturing line, every element—from packaging to product—is recyclable at the end of its life. Backed by a 50 year warranty, GreenStuf will never slump or settle over time, ensuring your project is insulated for the future. Find a solution for every aspect of your project in the GreenStuf range.

Why choose GreenStuf<sup>®</sup>?

Why choose GreenStuf®?

GreenStuf insulation is proudly made for Kiwis by Kiwis, manufactured right here in New Zealand. Safe to touch, with no nasty chemicals or airborne fibres, GreenStuf is easy to install. Independently tested and assessed to achieve all relevant fire standards for NZBC compliance, including downlights, GreenStuf is perfect for any project.

Choosing GreenStuf means choosing a safe, sustainable, durable product that will stand the test of time.

Insulation that’s safe for you, and your projects

Insulation that’s safe for you, and your projects

GreenStuf 100% polyester insulation doesn’t just comply with strict building standards, it’s also non-toxic and safe to touch—ensuring a hazard and itch-free installation.

H1 calculation service

H1 calculation service

To ensure your project complies with the building code’s H1 Energy Efficiency clause, our insulation experts can do an H1 calculation free of charge. As every house and commercial building has different requirements—depending on size, design, and location—we can work with you to help you achieve the best results.

Site sign off

Site sign off

You may have the best insulation on the market, but a poor install can significantly reduce its performance. It’s crucial to get it right first time, because once the linings are on you won’t get a chance to go back and fix it. To ensure your project is correctly insulated, our insulation experts can complete a free site sign off. We look for gaps, folds, and tucks, and ensure the right product has been installed in the right place. Once the sign off is complete, we provide a certificate that can be kept on file to give you peace of mind.

Spec writing

Spec writing

To save you time, we can write the GreenStuf insulation specification for your project. As insulation experts we know our product inside out, so we can ensure every aspect of the specification is accurate and carefully considered.

GreenStuf® insulation is available at Mitre10 stores across the country, including Glenfield, Westgate, Albany, Palmerston North, Manukau, and more.

Support local, buy local.

Find a full list of suppliers below

Quick Facts

Fire safety

GreenStuf polyester insulation has been independently tested and assessed to the relevant fire standards for New Zealand Building Code (NZBC) compliance, including downlights.


GreenStuf will not settle or reduce its performance over time, and is backed by a 50 year product durability warranty.

High performance

GreenStuf insulation is not affected by moisture, is naturally resistant to insect and vermin attack, and meets relevant requirements of the NZBC.

Safe to touch

GreenStuf is 100% polyester (like a duvet) so there’s no nasty itching or scratching. It’s completely safe and does not require protective clothing when handling or installing.

Safer indoor air quality

GreenStuf does not contain any added chemicals such as formaldehyde-based binders or fibres that can be breathed into your lungs.

Recycled content and recyclable

GreenStuf is manufactured using a minimum of 50% previously recycled polyester fibre (from PET plastic) and is reusable and recyclable at end of life.

Local and proud

GreenStuf is proudly made in New Zealand for Kiwi homes.

Breathe easier

GreenStuf has been independently endorsed by Asthma New Zealand and accepted into their Breathe Easy programme as a product considered safe for New Zealanders living with asthma.


GreenStuf is made under tightly-controlled manufacturing processes. To ensure GreenStuf is consistently of the highest quality, Autex Industries employs a team of experts to run a full-scale product testing laboratory on site.