Hunter Douglas has designed and installed a unique, custom-made 2,500 square metre ceiling for the ground floor of Netherlands’ largest multi-functional building, ‘De Rotterdam’.
The exterior section of the ceiling had to be made to withstand wind velocities of up to 150 km/hr and it had provide corrosion resistance. In addition, the city of Rotterdam also insisted that it had to come with a 50-year durability guarantee.
To meet these demands, Hunter Douglas developed a special storm-proof construction to support the whole system and covered the aluminium exterior ceiling with a corrosion-resistant coating.
The specially designed ceiling, which also meets tough acoustic requirements, comprises two layers: a panel ceiling with a high light reflection value and an open cell grid ceiling beneath.
In between are luminaires with fluorescent tubes, which allow light to bounce off the reflective surface and spread into the interior of the building.
The ceiling stretches from the outside to the inside of the building, with only a glass façade to separate the two sections. While the two look identical, the exterior ceiling had to meet the specific technical requirements.
And to ensure compliance with high interior acoustic requirements, Hunter Douglas specified perforated panels with an acoustic fabric that absorbs sound and minimises reverberation. As a result, the ceiling’s αW value is 0.85.
Kees van Casteren, architect at the Rotterdam-based agency, said: “We wanted the building’s exterior to cross over into its interior as seamlessly as possible.
“We achieved this by placing the glass façade on the 8.5 metre high ground floor farther back than the upper construction of the building, while allowing the ceiling to stretch from the exterior to the interior. It was not a system readily available on the market. Hunter Douglas took up the challenge to create a ceiling that matched our ideas.”
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