Bufferblocks offer a solution for stormwater drainage and buffering in urban areas prone to flooding and subsidence.

They work in a simialr way to infiltration crates but are much stronger, require a shallower installation depth, achieve higher buffering capacities and represent a more cost-effective solution in the long term. Traditional crate systems are made of plastic which, though lightweight, cannot support heavy traffic and needs a deep layer of drainage sand on top – something not possible in many regions. In contrast, the concrete Bufferblocks are strong enough for big trucks to drive over, making them suitable to use in a normal street. Furthermore, concrete does not weather like plastic and is less harmful to the groundwater.

Stormwater enters trough a permeable pavement/road or through a street gully in the cavities of the Bufferblocks, after which the water infiltrates into the soil or is redirected. The Bufferblocks have a water storage capacity of 266 to 532 liters per square meter and can also resist heavy traffic loads.

The Bufferblocks are designed to be inspected and cleaned by commonly used sewer inspection equipment.


  • Opitmal stormwater storage in the urban area due to less installation depth
  • Strong enough to withstand heavy traffic loads
  • High capacity of stormwater storage
  • Possible to inspect and clean with standard sewer equipment
  • Suitable as lightweight fill material (approx. 1,000 kg/m3)
  • Sustainable: The Bufferblocks can be made from recycled concrete and have a long lifespan

For more information on Bufferblocks as a water storage and flood solution, visit: bufferblock.nl


Additional information:

For more information on Bufferblocks as a water storage and flood solution, visit: bufferblock.nl

Pilot information:

Through pilot studies and knowledge-sharing, the STAR2Cs partners have designed and produced innovative, transferable, and effective mechanisms to overcome the ‘implementation gap’ that currently exists in delivering local adaptation action.