AUSBLOX GEOFOAM®
The best Expanded Polystyrene Foam block partnerPolystyrene foam solutions for civil, commercial
and residential construction
Ausblox Geofoam® EPS Foam Blocks
Ausblox is NSW’s leading manufacturer of Expanded Polystyrene foam blocks (EPS), renowned for their strength and lightweight characteristics. These EPS foam blocks are essential for both commercial and residential construction projects, offering durable and adaptable solutions. Ausblox Geofoam® is particularly effective as structural fill, replacing weak soil or landslip material to create a more robust and stable foundation.
As a ISO 2015 -9001 accredited manufacturer of EPS foam blocks in New South Wales, Ausblox offers a fully local supply chain. Our locally made EPS foam solutions meet strict Australian Standards and are ideal for time-sensitive infrastructure projects across NSW and the ACT.
In civil engineering, Ausblox Geofoam® is indispensable for constructing highways, bridges, embankments, and stabilising slopes. The versatility of these blocks in size and shape makes them ideal for various applications, while their ability to be produced in different densities and compressive strengths ensures they meet specific geotechnical requirements. This adaptability guarantees optimal performance across a wide range of commercial and residential construction projects.

Why use Ausblox Geofoam® EPS blocks?
Strong – Lighweight – Load Bearing – Cost Saving – Thermal – Environmental.
All Ausblox EPS foam blocks are manufactured in Sydney and tailored to your specific compressive strength needs. From slab support to deep fill in soft soil zones, our engineered EPS foam delivers unmatched reliability.
- Ausblox Geofoam® blocks can be up to 1% the density of soil while maintaining equivalent strength. This makes them a robust yet lightweight alternative to soil and other fill materials like tires, rocks, or dirt. This weight reduction lessens the load on underlying subgrades and buried utilities, making transportation and installation easier and cheaper. Additionally, as an engineered product, their performance is predictable. Variable density manufacturing allows for different compressive strengths tailored to various needs.
- Using Ausblox Geofoam® blocks eliminates the need for deep excavation into bedrock when dealing with weak soil. Using EPS foam accelerates construction time and reduces costs since they are easy to install, even in bad weather, minimising the need for heavy machinery. Their thermal insulation properties also prevent freezing and frosting of surfaces, ground, and buried structures.
- EPS foam is environmentally friendly, free of CFCs and other harmful gases. They are stable, inert, and won’t pollute soil or waterways. They are also recyclable, contributing to LEED credit requirements and requiring no environmental permit.
Slope Stabilisation – Landslide and Erosion Prevention
In areas where soil mass causes landscape failure, geotechnical engineers use EPS foam blocks to stabilise slopes and prevent erosion and landslides. Being up to 50 times lighter than traditional fills, Geofoam® solves mass and gravitational forces issues, making slope reconstruction more efficient and cost-effective.


Ausblox Geofoam® solutions.
Solving multiple geotechnical problems
Ground Fill
Geofoam is increasingly preferred as a fill material over dirt and soil. It offers cost savings in labour, transport, and materials. Due to its lightweight nature, fewer trucks are needed for delivery, and handling and installation are easier. Unlike traditional fills, EPS foam blocks provide stable fill structures with predictable performance. Their variable compression strengths allow precise load-bearing performance, making them more durable and reliable.
Embankments – Slope Reduction – Low Maintenance
EPS foam effectively stabilises slopes, allowing for smaller embankment sizes. This makes more land usable and creates secure, durable embankments. By using retaining structures with Geofoam fill, slope sizes can be dramatically reduced. Additionally, maintenance is minimised since erosion and failure risks are lower.
Retaining Structures
Incorporating Geofoam in retaining structures reduces the lateral pressure caused by heavy masses, preventing structural failure. Ausblox Geofoam® comes in various specifications to match compressive strengths and ensure predictable, engineered outcomes.
Utility Protection
Geofoam’s strength and lightweight protect buried utilities and structures by reducing vertical stress. This prevents damage and failure, lowering maintenance and repair costs.
Thermal Insulation
With excellent thermal properties, EPS blocks are 98% air by volume. This trapped air provides exceptional insulation, making them a cost-effective solution for preventing frost heave and protecting pipes and other utilities from damage.
Geofoam Applications
Ausblox Geofoam® is widely used in civil projects for various applications, including:
- New highway and road construction
- Road widening
- Bridge abutments
- Bridge underfill
- Culverts and pipelines
- Levees
- Artificial landscapes and green roofs
- Retaining walls and buried wall backfill
- Railway track systems and embankments
- Airfield pavements
- Stadium and theatre seating

Other Applications
EPS blocks can be cut into sheets and shapes for the building, insulation, construction, packaging, refrigeration, and film and stage industries. With advanced computer cutting technology, Ausblox creates intricate shapes like architectural mouldings, complex packaging, and props for film and theatre. They also produce formwork solutions and void shapes for serpentine walls, complex domes, display packaging for promotions, and protective packaging for various events.
Ausblox also supplies marine-grade polystyrene ideal for pontoons, flotation devices, and structural buoyancy.
Build better with Ausblox Geofoam®
Contact Ausblox today to order high-quality EPS foam blocks in NSW. With local manufacturing, responsive service and over 25 years of experience, we deliver dependable, site-ready EPS foam solutions.
FAQs
What made EPS foam blocks the go-to choice for our construction project in Sydney?
Ausblox EPS foam blocks are made in Sydney and engineered to meet Australian Standards. Used across civil and commercial projects, they solve geotechnical challenges and help fast-track delivery through a local supply chain.
Is EPS foam strong enough to support roads and buildings?
Yes, Ausblox EPS foam is designed for civil engineering and construction use, including ground stabilisation and load-distribution applications. They help resolve structural challenges where traditional soil fill is unsuitable.
How does using EPS foam help us save money in the long run?
Ausblox Geofoam® is a cost-effective EPS foam solution because it often eliminates the need for excavation or heavy machinery, cutting down on labour, and logistics. Local manufacturing also reduces transport and delivery delays
Is EPS foam safe for the environment and for residential use?
Yes. Ausblox EPS foam blocks are CFC-free, inert, and recyclable. All waste is recycled onsite, and the blocks are safe for both environmental and residential use.
Can EPS foam blocks be customised for tricky sites?
Absolutely. Ausblox offers custom-cut EPS foam solutions in Sydney using advanced profile-cutting tools. We deliver tailored solutions, even beyond standard specs, from sloped sites to complex formwork.