StyroTherm is proven insulation product, ideal for building & construction as well as creative and model making applications.

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Manufactured in Australia from Styroboard XPS – the highest quality extruded polystyrene – StyroTherm is a highly compressive and durable product. StyroTherm’s density and closed cell structure make the product practically impervious to water, dimensionally stable and organically inert. 

Fully compliant with the Building Code of Australia, StyroTherm can be used as an insulation material across a range of residential, commercial and industrial buildings.

Acknowledged to be one of the best value thermal insulation solutions available, StyroTherm is a truly green building product. Manufactured using processes that do not produce ozone depleting gasses, StyroTherm can assist in creating a stable and comfortable living environment by reducing reliance on heating and cooling appliances, saving on energy costs and prolonging the life of a building.

Versatile and easy to install in any weather, StyroTherm extruded polystyrene sheets can be used to deliver a robust slab edge insulation system, helping prevent thermal bridging around the perimeter of a home, as well as under residential or commercial concrete slabs to provide additional insulation benefits. StyroTherm sheets are suitable for use in moist environments with no loss in thermal resistance, and they will retain their dimensional stability.

Why StyroTherm?

  • Superior compressive strength
  • Extremely durable for long lasting applications
  • Lightweight & easy to handle
  • Practically impervious to water
  • Delivers long term retained R-Values
  • Environmentally friendly - CFC & HCFC
  • Complies with all relevant building codes


  • lightweight reverseFloor insulation
  • lightweight reverseUnder slab insulation
  • lightweight reverseSlab edge & perimeter insulation
  • lightweight reverseModel making
  • lightweight reverseEvent props

Product Specifications

  • Sizes
  • Thermal Conductivity
  • Compressive Strength
ThicknessR-ValueK-ValueTesting Method
25mm 0.81R 0.031 AS-2464.5//ASTM C518
30mm 0.94R 0.031 AS-2464.5//ASTM C518
40mm 1.29R 0.031 AS-2464.5//ASTM C518
50mm 1.55R 0.033 AS-2464.5//ASTM C518
60mm 1.82R 0.033 AS-2464.5//ASTM C519
75mm 2.15R 0.034 AS-2464.5//ASTM C518

NB: This information is based on our current knowledge and experience. In view of the many factors that may affect processing and application, this data does not relieve the purchaser of the responsibility of carrying out their own tests and experiments; neither do they imply any legally binding assurance of certain properties or of suitability for a specific purpose. It is the responsibility of those to whom we supply our products to ensure that any proprietary rights and existing laws and legislations are observed.

Min. Compressive Strength
(measured parallel to rise)
2%10%YieldTesting Method
25mm Sheet >60kPa > 250kPa n/a AS-2498.3//ASTIM D1621
30mm Sheet >90kPa > 250kPa n/a AS-2498.3//ASTIM D1621
40mm Sheet >150kPa > 350kPa n/a AS-2498.3//ASTIM D1621
50mm Sheet > 230kPa > 350kPa > 300kPa AS-2498.3//ASTIM D1621
60mm Sheet > 240kPa > 350kPa > 400kPa AS-2498.3//ASTIM D1622
75mm Sheet > 280kPa > 350kPa > 400kPa AS-2498.3//ASTIM D1621
Width 600mm
Length 2400mm
Thickness 25mm, 30mm, 40mm, 50mm, 60mm, 75mm
Edge Configuration Square
Nominal Density 32 - 36 kg/m3

Non-standard sheet sizes and thicknesses are available upon application, and can be cut to suit your specific requirements. Some sizes may require a lead time of 8 – 10 weeks.

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