4.8/5 stars based on 550+ reviews

Product details

Description

Please be aware that all Polymax products are made to order. ecoMaster recommends that you do not book any installers or time off until you have received your insulation. To find out the manufacturer lead time for your order please contact our helpful team on 1300 326 627.

Polymax underfloor insulation comes in different widths. To make sure you order the correct width for your project be sure to check out the FAQ. 

Australian insulation manufacturer CSR has made this R2.5 value insulation for Brisbane and Tropical regions.

Why do we need underfloor insulation in the tropics? In the summertime, days can be very hot, some winter nights can be pretty cool.  Our region cops a lot of severe weather events and high humidity.  Cooling can cost a lot of money. 

Many of the homes in Brisbane and the Tropics have been built for the climate with wooden floors, such as the iconic Queenslander with its high ceilings and breezy verandas. More modern homes do not have these beneficial attributes.

Wooden floors in a tropical climate are great: they are natural, and beautiful and store carbon for life. You enjoy the ease of keeping them clean and always looking fresh and inviting.

Whilst they can help to moderate the humidity, moisture can enter through your wooden floors from the ground underneath your house.  Often when there is a lot of rain the air in the crawl space under your home can become stagnant. This stagnant air can seep through into your home bringing mould, mildew, and unhealthy toxins into your home. The moisture can also stain and warp your wooden floors.

Apart from controlling the moisture in your home, insulating under raised floors and between the first floor and basement can help to maintain your interior temperatures. Based on the scientific premise that ‘hot air rises,’ the floor can draw hot air from outside into your air-conditioned interior, causing higher energy usage and electricity bills.

Benefits of underfloor insulation in the Tropics: -

  1. Healthier – helps to reduce moisture, mould and mildew
  2. Creates a barrier to help prevent stagnant toxins from entering your home.
  3. More thermally comfortable all year round,
  4. Lower energy usage for cooling
  5. Lowers your electricity bills
  6. Helps to improve the environment,
  7. Increases the resale value of your home

Save money now and forever.

At a glance

  • Typical Coverage: 9.0m2

  • Cost per m2: 430mm: $16.67 | 450mm: $17.77

  • Dimensions: 10m x width x 140mm x 2 Rolls Per Pack

  • Minimum Packs per Order: 1

  • Made in Australia

Frequently Asked Questions

Will underfloor insulation make a noticeable difference?

Yes—especially in homes with timber floors. Without underfloor insulation, up to 20% of your heating and cooling can be lost through the floor. You’ll likely notice warmer floors in winter, reduced draughts, and better temperature stability throughout your home - making it a smart, long-term investment for both comfort and cost savings. Many people also report needing their heater or air con less often after installation.

Is it safe and environmentally friendly?

If you’re using Polymax, yes! It’s made from 100% polyester (like a doona), contains no nasty chemicals, and won’t irritate your skin or lungs. It’s also non-toxic, low allergen, and fully recyclable—so it’s better for you and the planet.  And it carries a 70 year warranty.

What is underfloor insulation made from?

Our most popular underfloor insulation, Polymax, is made from 100% thermally bonded polyester fibres—the same safe, soft material used in quilts and pillows. It contains no glass wool, formaldehyde, or itchy fibres, making it safe to touch, low allergen, and ideal for DIY installs. It’s also fully recyclable and proudly made in Australia.

Can I install it myself, or do I need a professional?

If you're reasonably handy, you can absolutely DIY underfloor insulation! Polymax is safe and itch-free to handle.  We provide clear, step-by-step guides to help you through it. That   said, if your floor is very low to the ground or access is tricky, you may prefer to hire a pro.  Please contact us for a referral to a trusted installer in your area.

Load video:

Perfect for

🔹 Keeping Your Home Comfy – Helps keep your house warm in winter and cool in summer

🔹 Saving Money – Stops heat and cool from escaping, so you don’t need to use your heater or air conditioner as much

🔹 Soft and Safe – Made from soft, non-itchy polyester insulation that won’t cause allergies

🔹 Long-Lasting Protection – Strong and stays in place. Guaranteed to work for you for 70 years

What You'll Love

100% Polyester

Made out of 100% recyclable polyester

80% recycled plastic bottles

Made out of up to 80% recycled plastic bottles

Non toxic, non itchy

Not toxic, non itchy, non allergenic, formaldehyde-free

No chemicals or glues

Heat-bonded. No binding chemicals or glues

Rodent resistant 

Rats don't like to chew on it. Snug install ensures a rodent-free experience

Not impacted by water or mould

Water doesn't affect polyester. No mould issues

Fire rating NCC compliant

Fire compliant and safe

Maintains its loft

Maintains its thickness, will not collapse

Staples securely

Staples securely between joists. Suitable for variable width joists

What difference does it actually make?

Before

After

Customer Reviews

Based on 4 reviews
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A
Andrew Muphy
Easy to work with

Great stuff. easy to work with in a confined space. Holds in place easily prior to stapling. Note installation video shows the product as a green colour, however it is white. Details of the most suitable battery stapler should be included for those who are buying one. What voltage size etc. I was 1 roll short however the delivery quantity is only in 3.s...So I had to finnish off with another product which was not as easy to instal.

Thank you for your feedback A M.
We do hire staplers but that option is only available in Victoria.
Depending on the width of the packs, they come with either 2 or 3 rolls. Unfortunately partial packs are not a possible purchase.
We appreciate you feedback and will pass your suggestions onto the team.
If you have any other questions or suggestions please feel free to give our friendly staff a call on 1300 326 627.

D
David Parnell
Helpful

The ecomaster team are very helpful and the insulation was delivered on the day advised.

Hi David,

we are happy to hear that our team provided you with excellent service. If there is anything we can do to serve you further, let us know.

K
Karen H.
Great service

Prompt, courteous, flexible and friendly service with oodles of information given so that one could make a truly informed decision. The product was just what we were after.

Thanks for the feedback Karen!