Durable, organically inert and delivering a high compressive strength, XPS foam board is ideal for inverted roof insulation subjected to engineered loads or constant foot traffic.

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In Australia, green roofs are growing in popularity due to their key benefits – helping to reduce the reliance on summer cooling demands, reducing energy consumption and carbon pollution, and contributing to insulating and shading buildings. The combination of the substrate, plants and the embedded air in a green roof system also provides excellent sound insulation, leading to a more peaceful office environment, especially in urban areas.

StyroRoof, made from Styroboard XPS extruded polystyrene, is a closed cell sheeting that delivers high R-values and excellent compressive strength. Even when faced with extreme weather conditions, StyroRoof XPS sheet insulation still preserves its thermal and physical properties thanks to its high-density cell structure and low moisture absorption. Placed below the soil but above the concrete on a roof, XPS insulation can assist with creating a thermal barrier and improving energy performance of the overall building.

Why StyroRoof green roof insulation?

  • Highly compressive
  • Durable and sturdy for long-lasting applications
  • Low moisture absorption
  • KPA rating to suit every application
  • Lower energy bills through insulating properties

Applications

  • lightweight reverseGreen roofs

Why buy StyroRoof green roof XPS insulation board?

  • Australian manufacturer Foamex is a leader in developing innovative uses of expanded and extruded polystyrene.
  • Environmentally friendly, refrigerant-free, and producing no ozone-depleting substances, Styroroof complies with Australian Standard 1366 – Part 4, and meets the Building Code of Australia concerning energy efficiency requirements.
  • Foamex meets all Australian standards with independent research, rigorous testing, and extensive industry consultation.
  • All Foamex extruded polystyrene insulation is manufactured in Australia, produces no refrigerants during production, and is free from HCFCs.
  • As an industry leader, Foamex proactively collects and recycles EPS and XPS polystyrene surplus from building sites, commercial clients, and recycling locations accessible to the general public.

StyroRoof 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.

 


Contact us about StyroRoof XPS foam for green roofs

FAQs

What are the benefits of a green roof?

Green roofs provide substantial environmental and economic benefits by improving building insulation, which reduces heating and cooling costs. They also enhance urban air quality by filtering pollutants and particulate matter and extend the life of roof membranes by protecting them from UV rays and physical damage. Green roof systems support urban biodiversity by creating habitats for animals and insects and can increase property value and appeal.

Green roofs on buildings provide recreational spaces that promote mental well-being and stress reduction. They help combat the urban heat island effect, leading to more comfortable living

How do green roofs work?

Green roof systems are multi-layered and combine vegetation with roofing materials. It begins with a waterproof membrane to protect the building from water infiltration. Above this, a root barrier prevents root penetration into the waterproof layer, followed by a drainage layer, which ensures proper water management, and a growing medium supports plant life while retaining moisture. Polystyrene XPS insulation is integrated into the system to provide excellent thermal resistance, further improving the building's energy efficiency by reducing heat transfer.

Incorporating XPS polystyrene insulation into a green roof benefits from improved thermal performance and contributes to sustainability by reducing energy consumption and supporting urban biodiversity.

What is the best green roof material?

The best green roof insulation material provides excellent thermal performance, moisture resistance, and durability. XPS foam board meets these criteria well. It offers superior thermal resistance, which helps maintain consistent indoor temperatures and reduces energy consumption for heating and cooling. The moisture resistance of XPS thermal insulation makes it suitable for green roof applications, where exposure to water and varying weather conditions is expected.

What is the life expectancy of a green roof?

When appropriately installed and maintained, green roof systems in Australia have demonstrated impressive longevity, often lasting between 30 to 50 years or more. With diligent maintenance practices, such as consistent watering, proper drainage management, and periodic inspections to address any potential issues, green roofs can remain durable and functional for several decades, providing long-term environmental and financial benefits.

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