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Pavers      Stormwater Grates      What If?      Lintel & Facia Grates      Bioretention Systems       Kerb Systems      Cleaning     
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Kerb Bio-retention Systems

The Permapave Kerb Bioretention System is a most effective system of filtering stormwater runoff.

Permapave Kerb Bio-retention systems are installed on the uphill side of, and immediately before, a stormwater collection pit.

Water flow along the gutter is diverted into the Kerb Bio-retention System during rain events, and is filtered, then discharged either into the substrate to return to subterranean aquifers, or, if the substrate is non porous or unstable, directly into the adjoining stormwater collection pit.

permapave stormwater inlet grate
permapave kerb bio-retention pit

Importantly, Permapave Kerb Bio-retention Systems are easily and economically retro-fitted into almost every existing kerb.

When installed, the Permapave Kerb Bio-retention pit is filled with appropriate filtration media and covered with a trafficable Permapave Stormwater inlet grate so land retains its normal use after installation


Sizes are 1 metre long, and 300mm wide. Systems can be designed to suit most required capture rates.

Cleaning the system requires periodic replacement of filtration media, and periodic cleaning of the Permapave Grate.

Frequency of cleaning will be determined by frequency of rain events and contaminant profile of the area. It is probable that media replacement may only be necessary each 2 to 3 years.

The Permapave Stormwater Inlet Grate will require more frequent cleaning.

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