Permavoid combines robust modular cells with integrated silt/oil treatment and shallow flow‑control components, providing an efficient alternative to traditional aggregate sub‑bases. The system forms a durable, uniform structural raft for trafficked pavements and meets the performance requirements of BS7533‑13:2009.
High-strength modular subbase replacement and water management system
Subbase Replacement And Treatment
Effective Subbase Replacement
Permavoid eliminates the need for large aggregate layers while delivering reliable structural performance. Its modular polypropylene units form a rigid structural raft with strong compressive and bending resistance, making it suitable for a wide range of paved applications such as pavements, parking areas, and other load‑bearing surfaces.
By reducing excavation depth, cutting aggregate use, and integrating stormwater attenuation and infiltration directly within the build‑up, Permavoid provides a lighter, more sustainable, and more efficient solution for long‑lasting paved surface construction.
Sustainability And Circularity At The Forefront
Our commitment to sustainability means the product not only supports sustainable outcomes in cities, but is produced with resource efficiency in mind, reducing reliance on virgin materials and lowering the overall environmental footprint. Together, Permavoid’s performance and production ethos offer a genuinely holistic approach to sustainable drainage.
- 95% void ratio For maximum water storage
- 100% recyclable At the end of its lifetime
- 90% Recycled Materials Permavoid 150 is made from up to 90% recycled Polypropylene
- EPDs Available Because sustainability is important to us and you
Advanced Stormwater Solutions Beneath Paved Surfaces
Permavoid’s modular system is ideal for hardscape environments, delivering ultra‑shallow, high‑capacity water management beneath both traditional and permeable paved surfaces.
The geocellular structures have a void ratio up to 95%, greatly enhancing the pavement's attenuation capacity and reducing aggregate requirements in hydraulic pavements.
The system is suitable beneath asphaltic, block-paved or concrete pavements and for the full range of traffic conditions from domestic driveways to highways.
Integrated Pollution Control With Low Maintenance
Permavoid systems can incorporate biomats that capture and break down oil and other hydrocarbons at source, preventing harmful pollutants from entering the drainage network. By removing these contaminants early, the system helps cleanse runoff, supporting cleaner waterways and reducing environmental impact.
This built‑in treatment approach removes the need for traditional petrol interceptors and reduces maintenance, all while delivering a more sustainable, pollution‑resilient drainage solution.
Discover Permavoid
01 July 2018
Greenwich Wharf
