Platform on new construction, renovation, restoration and transformation
RAINWATER AS A SMART RESOURCE
On the construction site of ING's new Linden headquarters, people are visibly building for the future. The structural work is nearing its highest point, while on the second floors the finishing touches are already in full swing. A building that impresses not only because of its size, but especially because of its sustainable ambitions. In the middle of that playing field Sanitair-Installatie Hoogendoorn cooperates in the success of this project.
“We joined over two years ago after a tender,” says Michiel Karels, project manager at Hoogendoorn. “In the preliminary phase, together with the construction team, we worked out the entire design in 3D/BIM. We did a lot of clash checks so that we could solve bottlenecks as early as the design phase. That makes the work outside clearer and faster. And it opens the door to prefab.”
Within Linden, Hoogendoorn is responsible for all sanitary installations. From water supply to drainage, from fire reels to dry fire lines and from rainwater drainage to domestic water systems. A total package, commissioned by Klimaatservice Holland. Within the project, sustainability is given a very concrete meaning thanks to a well thought-out system for reusing rainwater. “It is a project in which everything comes together: technology, cooperation and smart preparation. For example, retention crates have been placed on the roofs in combination with drains with smart flow control valves. These valves are controlled by a weather computer that retains the water during drought and just drains in advance when rain is predicted.”
Excess rainwater is collected in a basin of as much as 250,000 liters next to the building. This water is filtered and then used to flush toilets and urinals. “During prolonged drought, we refill the retention crates on the roofs from that same basin,” Karels says. “This keeps the greenery healthy and the system in balance.” For this, Hoogendoorn realizes the complete piping network, the ‘Rain Manager system’ and various pump installations.
In the Hoogendoorn workshop in Woerden, meanwhile, work is in full swing. Complete sewer parts are being prefabricated here with the Geberit PE system. “We fully weld that together in our workshop so that it can be assembled on site in one go later,” Karels explains. “We build the water pipes precisely on site to prevent damage during transport. That's how we combine speed with certainty.”
Since September 2024 Hoogendoorn is visibly present on the construction site. In the rough construction phase, the pipes have already been cast in the basement floors and the foundation. Also the rough piping for water and sewerage is largely suspended on the floors. Meanwhile, the focus is on finishing the toilet groups. A phase in which everything that was conceived in the preparation comes together.
Linden shows how smart installations, working with prefab and sustainable water use reinforce each other. For Hoogendoorn it is above all a project in which everything revolves around cooperation, preparation and craftsmanship. Not by making it big, but by doing it well. And that is exactly what will make this ING headquarters ready for the future.
