Cupolex

Recycled-plastic dome formwork system for ventilated concrete slabs and stormwater detention tanks. Less concrete, less steel, less labour — proven across 2,500+ Australian installations since 2010.

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Service overview

About

TCupolex is a patented dome formwork system made from 100% recycled non-toxic polypropylene. Concrete is poured over interconnected modular dome forms, creating either floating or structural slabs on grade with an air-void underneath. The arch-column geometry transfers load to the ground while delivering an equivalent load-bearing slab with significantly less concrete and reinforcement than a standard pour.

The under-slab void has practical applications beyond structural efficiency. It can be vented to control humidity, remove vapours like radon, methane, and VOCs from contaminated sites, and prevent moisture wicking that damages flooring overlays. The system was originally developed in Italy in the 1990s for the US Air Force to mitigate radon gas in new buildings.

In Australia, Cupolex has been used across 2,500+ residential, commercial, and industrial installations since 2010, replacing both polystyrene waffle pods and conventional fill. Made locally in Australia from 100% recycled polypropylene, the system has won Best Environmental Product at Civenex Sydney and GreenSmart Sustainable Home of the Year.

The Slab Tank variant uses the same dome geometry to create cast-in-place underground stormwater detention and retention tanks — providing space-efficient on-site water storage under car parks, driveways, or open spaces.

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Less material, same load

Arch-column geometry delivers equivalent load capacity with significantly less concrete and reinforcement than a standard slab. Six times stronger than Australian standard requirements at the highpoint.

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Less material, same load

Arch-column geometry delivers equivalent load capacity with significantly less concrete and reinforcement than a standard slab. Six times stronger than Australian standard requirements at the highpoint.

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Moisture and gas barrier

Eliminates moisture wicking from soil to slab. Ventable for radon, methane, and VOC mitigation on contaminated or reclaimed sites.

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Moisture and gas barrier

Eliminates moisture wicking from soil to slab. Ventable for radon, methane, and VOC mitigation on contaminated or reclaimed sites.

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100% recycled polypropylene

Made in Australia from 100% recycled non-toxic plastic. Replaces polystyrene waffle pods with a fully recyclable system.

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100% recycled polypropylene

Made in Australia from 100% recycled non-toxic plastic. Replaces polystyrene waffle pods with a fully recyclable system.

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Dual application

Same dome system handles ventilated floor slabs AND Slab Tank stormwater detention. Two products, one technology.

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Dual application

Same dome system handles ventilated floor slabs AND Slab Tank stormwater detention. Two products, one technology.

Capabilities & Features

Product assembly

Category

Details

Slab applications


  • Commercial and industrial slabs on grade

  • Post-tensioned reinforced slabs

  • Concrete pavements and roads

  • Radon and soil gas mitigation

  • Refrigeration and freezer floors

  • Acoustical floors

  • Crawl space subfloors

  • Residential floor slabs and foundations

Slab Tank — stormwater applications


  • Stormwater retention and harvesting

  • Depths from 260mm to 2,500mm

  • Drivable under car parks and roads

  • TSS removal up to 60-90%

  • Pre-treatment integration

  • Manhole access for maintenance

  • Underground stormwater detention tanks

Why Cupolex

  • 100% recycled polypropylene — made in Australia

  • Best Environmental Product (Civenex Sydney) award winner

  • GreenSmart Sustainable Home of the Year

  • Eliminates polystyrene waste on site

  • Strong, safe, non-reflective working surface

  • 6× Australian standard load capacity at design points

  • 2,500+ Australian installations since 2010

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Our proven workflow

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Step 1

Design and planning

Step 2

Precision machining

Step 3

Final Inspection & dispatch

Common questions

Frequently asked questions

How does Cupolex compare with waffle pods?

Cupolex replaces polystyrene waffle pods with a 100% recycled polypropylene dome system. Practical advantages: no polystyrene foam debris on site, no cutting waste, non-reflective surface (no sun glare), structurally stronger underfoot during installation, and fully recyclable at end of life. Polystyrene-free construction is increasingly required by councils and sustainability frameworks.

What's the load capacity?

Can the under-slab void be used for services?

What is Slab Tank and how does it differ from regular Cupolex?

Is Cupolex approved by Australian councils?

How does Cupolex compare with waffle pods?

Cupolex replaces polystyrene waffle pods with a 100% recycled polypropylene dome system. Practical advantages: no polystyrene foam debris on site, no cutting waste, non-reflective surface (no sun glare), structurally stronger underfoot during installation, and fully recyclable at end of life. Polystyrene-free construction is increasingly required by councils and sustainability frameworks.

What's the load capacity?

Can the under-slab void be used for services?

What is Slab Tank and how does it differ from regular Cupolex?

Is Cupolex approved by Australian councils?

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