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Insulation for New or Existing Homes

Make your home warmer, healthier and more energy efficient with Mammoth.


Whether you’re building new or wanting to retrofit insulation into your existing home, we’ve got a Mammoth® insulation product to suit.  Mammoth modern insulation is a non-toxic, non-irritant polyester insulation for your home ceiling and underfloor. 


A well-insulated home is a warmer home that saves on energy use and improves the health of New Zealanders. Mammoth home insulation delivers three core benefits:

  • Comfort - Insulation prevents heat loss from your home in winter as well as from overheating in summer from the sun on your roof.
  • Health - A study by the Wellington School of Medicine* confirmed that people who live in insulated homes are healthier**.  
  • Energy efficiency - Most New Zealand homes need heating in winter and by limiting that heat loss you spend less money to be warm.

* Howden-Chapman, P. et al. “Effect of insulating existing houses on health in equality: Cluster randomised study in the community.” British Medical Journal, 2007. P334:460. ** A study by Otago University** showed that improved heating and insulation cut hospital admissions for respiratory conditions by 38% and energy use by 19%.  

Warm By The Fire


Mammoth is the modern option in home insulation with a soft, friendly-fibre. It's the same material that is used in household duvets and pillows.

Unlike traditional fibreglass insulation, Mammoth polyester insulation is free of glues, binders, formaldehyde and pesticides. We even use fibres from recycled plastic bottles and so you'll be able to feel good in your warmer, healthier home knowing that you've reduced the planet's landfills.

Mammoth is non-itch insulation so you don't need to wear gloves, goggles and coveralls just to handle it, it's moisture resistant, won't sag and is backed by a 50 year Manufacturer's warranty.

Install it yourself or have it installed by a professional installer.

    10 reasons to insulate your home with Mammoth

    1.  Non-itch, 100% polyester
    2.  New Zealand wide installer network
    3.  Doesn’t absorb moisture
    4.  Heat bonded so it won’t slump over time
    5.  Made using fibres from recycled PET plastic
    6.  Safe to handle and easy to install
    7.  Long lasting with a 50 year warranty
    8.  Approved for use in government subsidy programs
    9.  New Zealand-Made insulation
    10.  Manufactured by a carboNZero certified organisation
    Mammoth Install Team 1


    Finance and funding options available 

    If you have an accessible roof space and/or underfloor, installing insulation is surprisingly easy and has an immediate effect on how comfortable your home is in both winter and summer.  

    Insulation has such a positive effect on health that the New Zealand Government offers home insulation subsidies to help eligible homeowners retrofit insulation into their home. There are also a number of finance options we can discuss with you, including a 24 month interest-free offer, what some councils offer by letting you pay off your insulation via your regular council rates payments, and other payment options.

    Contact us today to find out more.



    Mammoth® Modern Insulation
    Manufactured by InZone Industries Ltd
    PO Box 204 289
    Auckland 2161
    New Zealand


    Call Us:
    0800 MAMMOTH
    (0800 626 668)

    Where to buy

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    Contact us using the form below and we can answer any further questions you may have products, subsidies and other support and we can arrange for a Mammoth installer in your region to give you a quote.