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Polymax R2.5 | Gosford | Polyester Underfloor Insulation

Polymax R2.5 | Gosford | Polyester Underfloor Insulation

Underfloor Insulation

Regular price $100.00
Regular price $136.00 Sale price $100.00
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Tax included. Shipping calculated at checkout.
  • 100% Polyester
  • Made from 45% recycled plastic bottles
  • Not itchy, non toxic, non allergenic
  • Australian Made
  • Returns within 30 days


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. 

Homes in humid, sub-tropical climates like Gosford and the Central Coast benefit significantly from underfloor insulation. Polyester Polymax R2.5 is the supreme product for this area for homes with wooden floors.

If you are one of the lucky ones with wooden floorboards, you will appreciate the aesthetics, the ease of cleaning these floors and the retention of their natural beauty.  For all the upsides, including being a natural product with the ability to store carbon for life (great for the environment), they can develop some problems which can detract from the thermal comfort, efficiency and indoor quality of your home.

In a warm, humid, wet climate floorboards will change with the weather conditions and the normal movement of a home. These incidents cause the boards to develop gaps, and cracks and absorb moisture. The gaps and craps allow air to leak in and out of your home impacting the thermal comfort and dryness of your home, particularly during the warmest and wettest months of the year.

When floorboards absorb moisture they are also likely to warp, twist, bulge and even leave moisture stains. These conditions lead to more mould and mildew growing in your home likely creating an unhealthy environment for you and your family members. In addition to the thermal comfort and the absorption of moisture, the gaps and cracks also leak air in and out of your home. This air will carry various pollutants, particularly from underneath your floor where the ground could remain wet and or damp.

Polymax R2.5 creates a barrier between your floor and the ground, and being water resistant is a great solution for these problems. You need sufficient crawl space underneath your home for you to move or crawl underneath to install this polyester insulation. We have made it as simple and easy as possible for you to do this with our informative "how to" videos.

The benefits are clear and you will really welcome the savings on your energy usage and electricity bills. You will find it to be:

* Great for your comfort * Great for the environment * And great for your wallet

Made in Australia from 100% Polyester with 45% recycled materials by CSR this insulation is produced especially for Australian homes with wooden floors.

Polyester underfloor insulation is best secured with galvanised staples (to avoid rust) for long-term energy savings and zero maintenance.

Polymax R2.5 is the safest and most effective insulation for homes with wooden floors in Gosford and the Central Coast.



  • 100% Polyester
  • Contains at least 45% recycled component
  • Non irritant, non-toxic, non-allergenic, and non-respirable.
  • No itching, no glass fibres in your skin, eyes or lungs.
  • Maintains its loft (thickness) for the lifetime of your home
  • Can be firmly secured between the joists with staples 
  • Hydrophobic, does not hold moisture
  • Not affected by mold or mildew
  • Rodent resistant – rats and mice don’t like it, won’t eat it, and won’t nest in it.
  • Non flammable – will not hold a flame
  • Heat-bonded, with no binding chemicals or glues
  • Formaldehyde-free
  • ISO9001 Quality Certification
  • ISO14001 Environmental Management System Certification
  • 70 years Durability Warranty
  • Manufactured in Australia
  • Made for Australian wooden floors


  • Helps make your home warmer in winter and cooler in summer
  • Reduces energy costs by up to 20%
  • Prevents draughts from coming up through your floor boards 
  • Perfect for allergy sufferers as it is non toxic and non allergenic
  • Improves the value of your home
ecoMaster's polyester subfloor insulation is rated at R2.5,  which achieves an overall rating of R 3.2 (without carpet) or R 3.5 (with carpet).



Width 450mm 430mm
Product R Rating R2.5 R2.5
Pack Type Standard Narrow
Coverage Per Pack 13.4m2 8.62m2
Rolls Per Pack 3 2
Length Per Roll 10 metres 10 metres
Loft/Thickness 140mm 140mm
Size of Pack Height 1350mm 860mm
Size of Pack Diameter 700mm 700mm
Weight 24Kg 15Kg
Material Polyester 100% 100%
Material Recycled Poly 45% 45%
Manufactured Australia Australia
Apha W NA NA




How To

ecoMaster have made it easy for you to insulate your own wooden floors with the safest and most effective Polymax underfloor insulation.

What you will need: 

  • Stapler (Electric, Double Insulated - not a hand stapler)
  • Staples (Galvanised)
  • Headlamp/flashlight
  • Gloves (Garden)
  • Goggles
  • Tarps (Helps keep insulation clean)
  • Lead/Extension Cord
  • Clothes that can get dirty
  • An installation buddy

Insulating a Web Truss Floor can be tricky, so we have a "How To" video to make it easy:  

 Pro Tips:

  • Open the packs a day or two before installing to allow the insulation to reloft
  • We recommend stapling the material at 100mm - 150mm intervals to ensure it is secure and will not sag over time.
  • For the greatest long lasting result, make sure the insulation staples that are used are galvanised staples.

Find Out More:


Q: What does Polymax Underfloor Insulation do?
A: Polymax underfloor insulation acts as a thermal barrier for your floors, to keep the outer temperature outside, and maintain the temperature of your home inside.  It also stops draughts, dust and pollen from coming up through your floorboards. 

Q: Can Polymax Underfloor Insulation be used in my climate zone?
A: You can use Polymax Underfloor Insulation in climate zones 2, 4, 5, 6, 7, & 8.

Q: Should I order the 430mm or the 450mm wide Polymax? 
A: For best fit and easiest installation, the material width should be 20mm wider than the space between the joists. To order the best material for your project, it is best to measure the space between the joists of your floor. Typically, joists will be 410mm (common in Sydney and Brisbane) so order 430mm wide. For spaces of 430mm between the joists (common in Melbourne) use the 450mm wide Polymax. If you are unsure please give us a call on 1300 326 627.

Q: Not all my joist spacing is the same? 
A: This is normal. Every underfloor has some degree of joist spacing variation. It is inevitable that some degree of Turn and Tear installation will need to be done. Be sure to watch the installation video found under the How To tab.

Q: Is Polymax vacuum packed?
A: No it is not vacuum packed but it is squeezed tightly into a double bag. For this reason it is best to immediately open the bags when you receive them to ensure the material has time to fluff up to its natural thickness before you install.

Q: Is Polymax Underfloor Insulation easy to install?
A: The difficulty of installing underfloor insulation largely depends on your individual home. Factors like height under the floor, joist spacing, access, among other things all play a part. Feel free to reach out to us if you have any questions about the installation, email us here, or call 1300 326 627.

Q: Do you have a recommended installer for the underfloor insulation?
A: A recommended installer is highly location dependent. To find out if we have a recommended installer in your area please email us here, or call 1300 326 627.

Q: What is the underfloor insulation made of?
A: Polymax underfloor insulation is made from 100% polyester, with at least 45% of that being recycled plastic bottles

Q: Is it fire rated?
A: This excerpt is taken from the datasheet:

The following results were obtained when Polymax was subjected to early fire hazard testing in accordance withAustralian Standards AS 1530.3: 

* Ignitability Index: 0
* Heat Evolved Index: 0
* Spread of Flame Index: 0
* Smoke Developed Index: 0

Q: Is there a noise reduction benefit on using the bulk insulation products
A: All insulation will have an acoustic benefit due to its density, unfortunately it is difficult to say how much because underfloor insulation is designed for thermal performance.

Q: How much improvement would underfloor insulation make?
A: Without underfloor insulation, your floorboards are the same temperature as outside, this is due to the floorboards rating is R0.7.  
With carpet and a great underlay, the rating is R1.0 and for many people an additional R0.3 is noticeable. When you add our underfloor insulation to your home, your floor will have a minimum rating of R3.2 with a timber floor, or R3.5 with carpeted floor.  With underfloor insulation installed, your floorboards are the same temperature as inside.

Q: Does wind affect the effectiveness of underfloor Insulation?
A: Polymax underfloor insulation has a slightly more dense face.  Ensure that is facing the ground.  Apart from being better for stapling through it also reduces wind penetration of the insulation.  Unless your underfloor is extremely windy, the wind will not penetrate the insulation.  "Wind wash" is simply a marketing term. 

Q: Can I cut the Polymax Underfloor Insulation?
A: Manipulating Polymax underfloor installation can be quite easy due to the manufacturer designing it to have a strong integrity when it is rolled out. If it is laying across you it is a LOT easier to tear. If using the turn and tear method is not something that you were interested in you are able to cut our installation with a fine metal cutting blade attached to a circular saw.

PLEASE NOTE This method may not be desirable due to the waste that will inevitably be produced and also reducing the coverage that the underfloor insulation pack will provide.

Q: Can I get a sample?
A: Yes. There is an underfloor insulation sample kit available. 
The cost of the sample kit is refunded when you purchase your underfloor insulation from ecoMaster.

Q: What are the dimensions?
A: There are two different variants of Polymax underfloor insulation.  Please check the Specifications carefully.  [Learn More]

Q: Can I return the insulation if I have ordered too much?
A: As this is custom manufactured to your order, you cannot return it.  However, if you have over-ordered, please contact us and we will help you sell it via social media where the demand for polyester underfloor insulation is quite buoyant. 


Manufacturing Delays: 

As you may be aware, there are delays to the entire insulation industry in Australia.   Many suppliers who import insulation from overseas are currently unable to do so.  They have flocked to CSR (particularly the Polymax brand), who are one of our key manufacturers. 

This has created unprecedented demand for CSR insulation that they are struggling to meet in their normal timely manner.These delays are universal across the industry

Please be assured we are doing our very best to get you the best quality insulation available. To avoid unnecessary stress, please do not book any trades people until you have received your insulation order. 


Can I collect my order from the Gosford depot? 

Yes, you can.  When your order is ready for collection, you will be advised. Be aware that the extended lead times still apply.  


Where can you deliver to?  

Gosford and surrounding areas of the NSW Central Coast. Freighters may be able to deliver further afield. Please contact us with your location for a freight quote. 


How will my order be delivered? 

Your order will be delivered by a CSR driver. 


Please take note of our Refund Policy before you place your order.


Q: What is the product warranty for Polymax?
A: Polymax carries a product warranty of 70 years, but can be highly effective for much longer than that. We have not yet seen a 'failed' polyester product. It is incredibly robust and is not damaged by the elements that would generally damage other types of insulation. 

Q: What is the installation warranty for Polymax?
A: As Polymax is a DIY product there is no warranty on installation.  

To get the best value for your investment, please, PLEASE watch the installation videos before you proceed.  

Q: How do I register for my 70 year warranty? 
A: Great question!   Register your purchase here and remember to retain your tax invoice.  Attach it to your warranty when you download it after registration.  File it with your important documents.  The warranty will be transferable to new owners of your home - so make sure they know about the warranty and provide them with the documentation to support it. 

If you have any questions, contact the ecoMaster team.  We are all ex-installers and have done this work thousands of times before.  We are here to help you.

Q: What do I do if I have a problem with this product?  
A: Refer to our Returns / Refunds page [Learn More].  Our Research and Development team will be keenly interested to learn of any product failure and will want images and samples of the product (if possible) so they can determine what the cause of failure was.    

View full details

Customer Reviews

Based on 1 review

Slight hiccup with delivery however the Team were very transparent and provided good updates.
Installation was simple. Easy to tear to fit accordingly. This job can be hot & stuffy climbing in roofs or underfloor, so not having to wear protective gear is a huge benefit.

Hi Justin,
Not having to wear protective gear whilst installing our polyester insulation is a huge benefit. Glad to know that your installation went well.

In regards to the delivery, regrettably there were some delays through the supplier, which unfortunately we have no control over. We did our best to communicate this effectively as possible and are pleased to hear that you feel we did so.
Your feedback helps us to improve service for everyone and are grateful that you took the time to leave us a review. Thank you!