Foundation Systems


PolyVoid Systems

 PolyVoid is a concrete suspended slab ground floor slab, cast on collapsible void formers, that allow heave and shrinkage of the underlying soil without damaging your slab.

Each year in Australia, some 50,000 houses experience some form of cracking or structural damage. This accounts for about 80% of all housing insurance claims, and most often soil movement is the cause.

Should a home owner water their beloved gardens excessively, or ignore broken drains and pipes, the soil will heave. This movement too can result in cracking walls and timber frame distortion.

Damage to your home is avoidable by using a PolyVoid Suspended Ground Slab System.


Cost CertaintySlab component costs can be determined from the site Geotechnical report

Drainage Issues ReducedSite drainage issues are reduced as abnormal moisture conditions will not affect the slab

Site Supervision SavingsSite supervision and management of other trades can be reduced

Single Slab DesignReduced complexity for estimating, engineering design and installation

Freedom of LandscapingRemoval and future planting of trees will not affect slab design, cost or overall performance

Peace of MindFor the home owners, builders and engineers - suitable for all site classifications

Refined EngineeringNo longer a need to 'over engineer' in order to reduce risk as typical with traditional systems

Thermal EfficienciesBetter thermal efficiency compared to other slab on ground alternatives

Cracking EliminatedCracking to slabs, brickwork, plasterboard and finishes due to site movement is eliminated

PolyVoid System Applications


The PolyVoid Suspended Ground Slab System can and should be used on any home where reactive soils and the environmental conditions (weather, trees etc) can have result in movement of the foundation soils and cause damage to the home.

Investing in the best ground slab system available for your home is a good idea. Knowing you won’t have any damage to your home from reactive soils will give you piece of mind.

Contact your nearest sales office for a quote

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With complete traceability of every pile manufactured by our Quality Assured National Manufacturer, Katana Piles & Extensions are the strongest, and most reliable in their class.