Formavoid is a 100mm deep plastic void former that encourages fill material into an extremely strong series of columns and arches, leaving 60% open void space beneath the arches for source control water management & storage. When filled with aggregates, ranging in particle sizes from 1mm – 40mm, Formavoid combines with the aggregate to create a granular base with enhanced stability and increased water storage capacity.

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Formavoid can be filled with 30% void type 3 aggregate for subbase attenuation applications; or soil can be used as fill material for green infrastructure applications.