Stormwater runoff from traditional pavers and driveways can often cause stormwater systems to be overloaded in heavy downpours. Firth’s FlowPave, from the EcoPave® range, is an alternative to traditional pavers and concrete as it allows stormwater to permeate the paver (or its surrounds) significantly reducing peak water flow during storms.

Stormwater contains pollutants such as chemicals, fertilisers, sediment and oils, which can destroy the quality of water flowing into catchment areas. Firth’s FlowPave system can help to preserve water quality by absorbing rainwater and filtering contaminants through the greywacke aggregate sub-base, putting a cleaner water back into the ground or stormwater system.


Firth’s FlowPave in first ever 10 Homestar rated house

This 140sqm, two-storey home in Christchurch, featuring Firth FlowPave, is New Zealand’s first 10 Homestar home and was designed and developed by architectural designer Bob Burnett. “Firth has several permeable options and we chose FlowPave (200mm x 100mm x 80mm) in Black Sands as it has an enlarged nib on all four sides which creates very good drainage capability as ninety percent of the site had to be permeable to satisfy the Homestar requirements,” said Bob.

Firth FlowPave satisfies Council requirements at Woburn Apartments, Wellington

The new Woburn Apartments, part of the Masonic Villages Wellington retirement village, were completed in September 2017 and feature large sections of Firth FlowPave permeable paving.

“We were required by Council to use a permeable paver for large areas of hard surfaces to help process surface water run off,” explains Alan Atack, Project Manager for the Masonic Villages Trust. “We had to find a way to deal with water storage on site and Firth FlowPave in Natural was a very good solution. The fact water seeps slowly into the substrate has dramatically dealt with water run-off in high rain events and has reduced pressure on stormwater systems inside and outside the village.”

Advantages of the Firth FlowPave System:

  •  Reduces rainfall runoff from hard surfaces, decreasing demand on drainage systems
  • Reduces the need for retention structures such as ground sumps
  • Recharges natural groundwater and aquifers
  • Improves hydrological management of stormwater peak flow by releasing in a controlled manner
  • Heavy metals such as zinc and copper are filtered by cationic exchange using greywacke sub-base drainage aggregates

For more information about Firth’s FlowPave System click here or contact us at or 0800 FIRTH1.