Green Roof
Green Roof Gardens are popular for city roofs, offering insulation, reducing temperatures, improving air quality, and providing outdoor space. Extruded Polystyrene beneath soil acts as an effective thermal barrier, supporting walkways and heavy loads without degradation or water absorption. Austech Stella XP offers high-strength options for various needs.
PRMA
Protected Roof Membrane Assembly (PRMA) uses Extruded Polystyrene Insulation over waterproof membranes, shielding them and creating a continuous thermal barrier. Secured with ballast like gravel or pavers, it offers a simple, effective way to insulate and protect concrete roofs while maintaining waterproof integrity.
Cold Storage
Cold storage environments are extremely harsh, with cold temperatures, high moisture, and heavy loads. Stella XP is widely used in cold storage, from small cool rooms to large facilities like Rand Cold Storage. It consistently outperforms other insulations in maintaining performance and supporting heavy loads.
Commercial & Residential
Insulates under concrete slabs, reducing temperature fluctuations and improving energy efficiency. Its high R-values in small thicknesses save space, ideal for retrofits. Durable and versatile, maintains performance for 20 years, making it a cost-effective solution that enhances modern large-scale construction.
Wine Cellar Insulation
Extruded polystyrene insulation is ideal for wine cellars, resisting moisture and reducing temperature fluctuations. Its high R-values lower energy costs, while its water resistance and compatibility with various finishes make it perfect for retrofits and protecting delicate storage environments.
Concrete Sandwich Panels
Extruded Polystyrene enhances masonry and concrete walls by creating insulated panels during casting, improving thermal performance. Austech’s non-conductive ties minimize thermal bridging, making panels energy-efficient. Just 50mm of offers R1.78, significantly boosting insulation compared to brick or concrete, ideal for faster, better-performing construction.
Model Making
Insulation under concrete slabs enhances energy efficiency by creating a thermal barrier, reducing temperature fluctuations. Its high R-values in small thicknesses save space, ideal for retrofits. With strong tensile strength and long-term performance guarantees, and is a durable, cost-effective choice for commercial and residential underground insulation.
Floor Heating
Under-slab insulation creates a thermal barrier, reducing heat loss and energy demand in in-slab heating systems. It extends system life, maintains properties for 20 years, and withstands moisture and soil. This leads to lower operating costs, energy savings, and reduced greenhouse gas emissions.
Lightweight Construction
Extruded Polystyrene with render offers a lightweight, efficient insulation solution for brick and masonry facades. It provides a continuous thermal barrier, improves energy efficiency up to 30%, and is easy to install without drying time. Enhances renovation and extension projects, reducing thermal bridging and maintaining long-term performance.
Stella XP
Stella XP insulation’s R-value is based on real-time ageing and the product is warranted to maintain 90% of its insulating value for twenty years. Stella insulation has a combination of characteristics that yield very low water absorption and is available in a range of compressive strengths that accept loads up to their design limit with little deformation.
Insulation performance you can trust
Stella XP insulation’s R-value is based on real-time ageing and the product is warranted to maintain 90% of its insulating value for twenty years. Stella RX insulation has a combination of characteristics that yield very low water absorption and is available in a range of compressive strengths that accept loads up to their design limit with little deformation.
Extruded polystyrene has you covered
Durability, reusability, moisture resistance, and the ability to retain R-value in the presence of water enables Stella XPS insulation to be used in a wide variety of building applications from roof insulation to below-grade use where the insulation will be in constant contact with moisture.
PRMA insulation is placed directly over the waterproof membrane, providing protection for the membrane and also creating a continuous thermal barrier on the roof. Stella RX is held in place with a specified ballast, usually gravel or concrete pavers.
Good insulation pays for itself
Stella XP has high compressive strength means it can easily be walked on once the specified ballast has been installed. This creates an easy space for maintenance crews to access the roof, but can also help create rooftop recreation areas, adding an extra usable space to the building and increasing urban public space. Extruded Polystyrene Insulation requires no additional waterproofing and can easily cope with regular water immersion making it ideal for retro-fitting on older buildings.
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New South Wales (HQ)
11 Bowen Cr West Gosford, NSW 2250
Phone: 02 9831 1623
Queensland
Pre-paid orders only pickup from DWL
(Dynamic warehouse logistics)
145 Tile Street, Wacol Qld 4076
Austech Ph: 07-3268-3066
FAQ
What is Stella XP?
Stella XP is a closed-cell extruded polystyrene insulation board.
What sort of projects can Stella XP be utilised on?
Stella XP has a range of applications, from insulating commercial roofs to insulating under house slabs.
What is the difference between extruded and expanded polystyrene?
Expanded polystyrene (EPS) is beads of polystyrene expanded by steam into blocks that are then cut into boards. This process leaves air gaps between the beads that absorb moisture, which lessens thermal and physical performance.Extruded polystyrene (XPS), like Stella XP, is a closed-cell material with higher compressive strengths, R-values, and moisture resistance than any grade of EPS.
What is R-Value?
R-value is a measure of thermal resistance used frequently in the construction industry and is the standard for measuring insulation’s effectiveness.
What are Stella XP advantages?
Stella XP’s closed-cell construction provides many advantages over expanded polystyrene such as:
Higher R-value per thickness
No physical or thermal loss through moisture absorption
Higher impact resistance
A twenty-year warranty
What are the “R-Values” of Stella XP?
50mm = R1.78
75mm = R2.67
100mm = R3.56
Why do some other products have much higher R-Values?
Generally, they don’t. Many products falsely use the American system, which has R-value ratings around 6 times greater than the Australian standard. For example, an R6.0 rating in America corresponds to approximately R1.0 in Australia.Austech uses the Australian standard temperature of 24°C, but if you use a smaller temperature, the R-value increases. For instance, 50mm of Stella XP has an R-value of R1.78 at 24°C but jumps to R2.22 at minus 30°C.
Is Stella XP affected by termites?
No. Stella XP is not a food source for ants or termites, but they may use it as a path to other food sources. Standard termite protection processes should be used as with any building material.
Is Stella XP fire rated?
Stella XP has the following fire-rated indices:
Ignitability: 9 (0-20)
Spread of flames: 6 (0-10)
Heat evolved: 6 (0-10)
Smoke developed: 8 (0-10)
What sizes and thicknesses are available?
Stella XP comes in various thicknesses, from 25mm up to 100mm. Layers can be combined to reach desired R-values.Standard board sizes include:
2050 x 600 mm with shiplap edges on the long sides
2400 x 1200 mm in 50mm thickness
Environmental strategy
Extruded polystyrene insulation is an inherently green product. It helps limit thermal fluctuations, reducing the need for artificial temperature controls and lowering energy consumption and fossil fuel use. Stella XP estimates that their insulation range eliminates over 1 billion tonnes of greenhouse gases annually—equivalent to the emissions of 200 million passenger cars or two billion barrels of oil. Owens Corning’s commitment to reducing environmental impact has earned them recognition as one of the top green companies, with targets to reduce GHG emissions, energy use, waste, and water consumption.
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Austech External Building Products Pty Ltd
ABN 16 058 986 511
