Jurgen van de Laarschot, initiator of Co-Green and Urban and Real Estate Developer at Eigen Haard explains how the concept was implemented, “When we wanted to start detailing of the plan, we had little knowledge about sustainable building and therefore needed external experience. We also wanted to implement this plan within the same budget as for a standard new home. Stadstuin Overtoom was chosen as pilot project to gain more knowledge about how to create a climate-neutral residential area and how to implement it in an economically efficient manner.” To make the most of the project an intensive cooperation was created to achieve these goals together.
One of the parties involved in Co-Green is the builder and developer ERA Contour. Jurgen Weerdenburg, Deputy Director at ERA Contour comments:” We were selected by Eigen Haard to think about the implementation of climate-neutral housing in Stadstuin Overtoom in partnership with the KOW architects. There were very high ambitions with regard to sustainable features such as recycling of building materials, CO2 reduction, etc.” These features already fulfill the requirements of the building directive 2020 of the city of Amsterdam, which complies with the EU standard that all buildings constructed as of the beginning of 2021must consume nearly zero energy and must be sustainable. By means of a smart cooperation from the very start, achievement of these goals and cost efficiency were guaranteed.
Upcycling with clay building materials
The highly ambitious plan also influenced the selection of used materials. One of the KPIs was that 95% of demolition materials had to be re-used for the new structure. Bricks are perfectly suited for this purpose, as they can easily be recycled. The ceramic material of the old bricks was crushed and used for the production of new bricks in the Wienerberger factory in Afferden, Netherlands. These recycled facing bricks are as durable and attractive as the original product. Minimization of the environmental impact of ceramic production is vitally important for Wienerberger. Instead of wasting resources, clay as natural material can be used several times and is therfore a highly sutainable building material.
It is a great challenge for manufacturers in the construction industry to move to closed material Loops.
Jurgen van de Laarschot, Eigen Haard
Project nameStadstuin Overtoom, Amsterdam, Netherlands
ClientWoningstichting Eigen Haard
Base: Terca Branda
Year of completion2017