High Thermal Performance Insulation Panel for Under Slab Floor Applications

Product Introduction

PIRMAX US FLOOR Panel is a modified PIR (Polyisocyanurate) rigid thermal panel that can be used for underslab floor applications. PIRMAX US FLOOR PANEL is a light weight closed cell PIR consisting of a foam inner core, thermoset between two layers of embossed aluminum foil facings.

PIRMAX US FLOOR PANEL is CFC free with zero Ozone Depletion Potential (ODP), does not release Volatile Organic Compounds (VOC’s) and is manufactured in Australia.


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PIRMAX US FLOOR Panel certified by Declare as Red List Free!


  • Complies with AS/NZS 4859.1:2018.
  • Amongst the highest thermal values of rigid board insulation due to the product’s low thermal conductivity.
  • Mould and Moisture Resistant.
  • Achieves excellent fire hazard results when tested to AS/NZS 1530.3.
  • RED LIST FREE product, ingredients are 100% disclosed to 100 ppm, and do not contain any Red List chemicals.
  • Not corrosive to metal over time.

Australian Made

PIRMAX US FLOOR PANEL is manufactured in Australia by an Australian owned and operated company, & guarantee the highest quality insulation material.  As our products are wholly Australian Made we take pride in our manufacturing to ensure a high standard of quality, service and value.

Recycled Content

PIRMAX US FLOOR PANEL utilises a proprietary process that enables the use of waste PET bottles in the product, that otherwise would have been destined for landfills or found their way into our oceans and rivers. In this process, plastic waste is transformed into highly efficient insulation that helps conserve energy and reduce emissions.

Calculate how many bottles your project will recycle:


PIRMAX US FLOOR Panel is designed to be used as thermal insulation in underslab floor applications, protected by waterproofing membranes. 

Typical applications include under Concrete Slab On Ground floors.

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Product Details
Product NamePIRMAX US FLOOR Panel “modified PIR rigid thermal insulation”
Product CodePIRMAX US FLOOR ______ (mm)
Panel Size2400mm x 1200mm (2.88m2).
Also can be cut to custom lengths and sizes.
FacingsFoam inner core, thermoset between two layers of embossed aluminum foil facings
Product R Values
Nominal ThicknessDeclared R-value (m2K/W)
Summary of Testing Results
ThermalAS/NZ 4859.1:2018Refer to table above
Ignitability IndexAS 1530.30
Spread of Flame IndexAS 1530.30
Heat Evolved IndexAS 1530.30
Smoke Developed IndexAS 1530.30-1
Water Vapour ResistivityAS1366.2/AS 2498.310-15 (g/m2.24h) water transmission rate
Compressive StrengthAS1366.2/AS 2498.3≥125+ (kPa) at 10% compression
DeclareRed List Free (does not contain any Red List Chemicals)
Volatile Organic Compounds (VOC)<0.01 mg/m3
TransportAustralian made & owned, not transported from overseas, minimal carbon footprint
Energy EfficientLong term energy savings and environmental benefits
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PIRMAX ISO2 Silver now certified by Declare as Red List Free!
Installation Instructions

Before installing PIRMAX US FLOOR PANEL make sure that all documentation has been approved for the application.

1. Lay water proof membrane to (DPC) level prior to installing PIRMAX US FLOOR PANEL.
2. Compress a thin layer of sand to achieve a level surface.
3. Install the desired thickness PIRMAX US FLOOR PANEL.
4. A Damp Proof Membrane overlapping/sealing joints. Edges must well above the height of the wall DPC ensuring that it links/forms the DPC.
5. PIRMAX US FLOOR PANEL should not be installed where there are any joint loads.
6. Pour the floor slab.