23 Spotlight EDGE Olympic | Photo: EDGE Technologies Sustainable building materials: Edge Olympic ‘We know precisely what all the materials are made of and where they come from.’ Instead of demolishing the original building, developer EDGE Technologies decided to redesign the Olympic Plaza on the Fred Roeskestraat. The original building from 1980 was stripped, two new floors were added and many EDGE used the Madaster platform that maps which materials are used and where they come from for consumers and companies. This helps to choose sustainable materials, but offers no guarantee the building itself is built sustainably. For that a visionary approach is required and EDGE’s vision is clear: to build as sustainable and circular as possible. Jan Hein Tiedema, EDGE Technologies Executive Managing Director explains how this works out in practice. ‘We first looked at how we could reuse as many materials from the old building as possible. The façade was made of stone for example and is now used as flooring over most of the bottom floor. All building materials were carefully chosen: we know precisely what all the materials are made of and where they come from, and chose the most sustainable suppliers. To build the two additional floors, we used a wooden frame that can be disassembled completely, and could easily be reused somewhere else in the future. The Madaster platform is in effect a post-examination: you build a 3D model of the building and provide information on the materials used. They analyse this and give a percentage of circularity. We achieved a 48% score for this building – a high mark for The Netherlands. This construction method will most probably gain in popularity and subsequently, the scores will increase too. This type of development takes a bit more time, and sometimes the materials are more expensive. In the end, you still need to be able to rent or sell at market levels, but this is what we believe in. If we had a client who was willing to pay well, but did not want to build sustainably, we would not accept the commission. The Madaster platform is an online tool that maps materials used in property development. This helps recycling and reusing materials when a building is renovated or demolished. The platform is based on the book Material Matters published in 2016 by architects Thomas Rau and Sabine Oberhuber. The book describes the transition to a new economic model whereby the consumer is no longer the owner but the user. Sustainability report Zuidas 2018
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