In cooperation with

Orlysquare Amsterdam

Orlysquare represents a case where the former bus-station on the roof of the Amsterdam Sloterdijk Trainstation was transformed into a 4000 m2 rooftop park.

Amsterdam, The Netherlands
Water capacity
1566m2 223.400 litres


Take a closer look at this rooftop project Orlysquare Amsterdam:

The bus station was moved to a new location and at the end of 2012 it was decided to transform the vacant empty "grey" roof-square into a more attractive, people-oriented environment. Ultimately, a roof park was realised where rainwater is collected an reused for irrigation.

On this roof-square there is space for biodiversity, many flowering plants and possibilities for a pleasant stay for people in a green environment, supported by the necessary catering establishments.

We place a high priority on creating solutions that meet the best sustainability standards.


Multifunctional blue-green roof System

The hollow Permavoid subbase makes it possible to store more rainwater in lightweight geocellular units underneath the soil in podium decks, blue-green roof systems and roof gardens. This stored rainwater is made available to the plants by capillary rise through capillary fibre columns in the Permavoid units. This nature- based solution of capillary irrigation eliminates the need for drip lines, valves, hoses, pumps and the associated maintenance requirements. Water is available for the plants when they need it, naturally, on-demand, and most importantly without the use of energy; just like in nature.

Water is the key to successful green infrastructure at any level, in every green design. Keep rainwater out of the sewer and put it to work to support, biodiversity and help cool the urban environment.

See how we do Multifunctional roofs

Inspiring projects

Multifunctional Roofs

Find your local distributor nearby.

Permavoid source control ensures that no precious water goes to waste by catching, storing and reusing stormwater for irrigation, evaporation and infiltration. Find your local Permavoid distributor here to learn more about the technology and become part of the international movement.