Warenar wanted a high-impact construction to use as its flagship building for its future real estate operations, and so the architects replaced the traditional building material, terracotta bricks, with a truly unexpected material, glass. This allowed them to avoid the classic stratified laminated glass façade by using real glass bricks, taking advantage of their structural properties while reproducing the shape typical of the city’s vernacular architecture.
With support from Delft University, which conducted structural tests on the material, the architects found that glass is even more resistant to compression than concrete, so that it has great theoretical potential for structural uses. But to satisfy both the structural engineers’ and the architects’ requirements, the bricks were laid over a bed of UV-bonded transparent adhesive silicone mortar. It is curious to note that the first layer of brick was levelled off by pouring traditional Dutch full-fat milk over it, the ideal liquid to function as a reflective surface. Water might have be cheaper, but it could not achieve the same effect and create a perfectly level façade!
In this way, the low arches of the doors and windows were also made out of a single block of glass, which despite its delicate appearance can withstand a force of up to 42,000 Newtons (4,200 kg).
Architect: MVRDV Principal-in-charge: Winy Maas
Design Team: Gijs Rikken, Mick van Gemert, Marco Gazzola, Renske van der Stoep and Antonio Luca Coco
Copyright: MVRDV 2018 – (Winy Maas, Jacob van Rijs, Nathalie de Vries)
Co-Architects: & Van Dijk Wim Gietermans, Arjan Bakker, Tuğrul Avuçlu
Manufacturer glass bricks: Poesia (brand of Vetreria): Ivano Massarotto
Importer of Delo glue: Siko - Rob Janssen
Contractor: Wessels Zeist - Robert van der Hoef, Richard van Ende, Marco and Ronald Van de Poppe
Constructor: Brouwer&Kok - Paul Brouwer ABT: Rob Nijsse
Research: Delft University of Technology - Frederic A. Veer, Faidra Oikonomopoulou, Telesilla Bristogianni
Municipality aesthetics commission: Wealth - Charlotte ten Dijke, Ellis van den Hoek, Natasha Hogen, Patrick Koschuch, Alexander Pols, Gus Tielens, Marcel van Winsen, Pepijn Diepenveen