The ZIN project in the Brussels northern district Noordwijk has transformed the iconic WTC towers into a versatile complex. Dismantling began in April 2019, with the existing cores of the towers being retained. These are now connected by a new 14-storey double-height volume. An incredible 95% of the materials for the construction of the new building were reused, of which 32% were recycled.
Gielissen took care of the realization and installation of part of the interior. All materials were meticulously documented and traced to meet the strict requirements of the Flemish government. To monitor this properly, a materials database was created documenting all the materials and their origins. With every single component part, right down to screws and veneers, registered and traceable.
Most materials had to be FSC® certified, guaranteeing they originate from sustainably managed forests. This was especially applicable for materials such as veneer and upholstery. In addition, we used cradle-to-cradle materials, which are fully reusable or biodegradable.
The large entrance desk and the long ten-meter benches were among the most striking elements in the interior, designed for intensive use in public areas. Ben Vandenberghen, account manager at Gielissen and involved in the project, relates: ‘We created benches that also serve as planters. All according to the architect's specifications, to bring more light and atmosphere into the building. Based on the prescribed materials, we also suggested alternative sustainable materials.'
The building has been designed based on the zebra concept, with different functions such as offices, apartments and a hotel alternating without encroaching on each other, just like a zebra’s stripes. This concept ensures that there is life and movement in the building 24/7. Ben explains: ‘The zebra concept aims to ensure constant activity, seven days a week and 24 hours a day, contributing to the building’s liveliness and appeal.’
The completion of the ZIN project at the end of 2023 was an important milestone for Gielissen. ‘We are proud of our contribution to this sustainable and innovative project', Ben relates. ‘The ZIN complex allowed us to demonstrate our reliability as a partner for large, sustainable construction projects.’
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