Sometimes it takes an intractable problem to inspire an inventive solution. Faced with an ageing construction workforce and a shortage of apprentices, the Netherlands has come up with what may prove to be the makings of a housing revolution.
Collaborating with the public and private sectors, Eindhoven University of Technology has been working on a plan called Project Milestone to build five 3D printed houses in the city of Eindhoven next year.
A technology whose time has come
3D printing is a media-friendly term that’s often used as an alternate name for the wider technology of additive manufacturing (AM). The process involves the use of a computer and computer-aided design software to relay messages to a machine which “prints” material in the desired shape. The technology has been in development over the past thirty years, but recently large-scale 3D printers have emerged which can handle materials such as plastic, metal and concrete.
3D printing gets building
Dutch architects and civil engineers have been leading the way in exploring the construction possibilities of AM. In 2016, DUS Architects 3D printed an eight-square-metre cabin, and later initiated a project to build a full-scale canal house in Amsterdam. Meanwhile, in the south-eastern town of Gemert, the world’s first 3D-printed concrete bridge was opened in 2017.
Project Milestone is by far the most ambitious AM construction initiative to date. A park in Eindhoven will be the site for five homes which have been designed to resemble boulders left behind by a retreating ice sheet. Van Wijnen, the contractor for Project Milestone, explains that the building process will be a learning curve:
“The houses will be printed one after the other, which means that each can benefit from what was learned on the previous and can be adapted directly to the wishes of the residents. For example, the first house will be a single-storey structure printed off-site. The ambition is to print the fifth home on location as three layers.”
The homes of the future?
Van Wijnen and other proponents of concrete printing in 3D believe it has the potential to drastically change the future of residential construction in terms of speed, affordability, sustainability, freedom of form and choice. Company director Rudy van Gurp forecasts that by 2022, about 5% of homes will be made using a 3D printer:
“We see Milestone not as an experiment, but as a pioneering innovation that will cause a stir in the construction sector.”
In the UK, as the gap between demand and supply of housing continues to widen, the need to build more homes is growing. With savings in material waste, energy and CO₂ emissions, AM presents significant benefits for the construction sector, which will be closely watching developments in Eindhoven. Recent research suggests that, far from being a here-today-gone-tomorrow fad, AM is set to transform the future of building for good:
“The adoption of AM as an advanced technology appears to have a secure place in the future of construction, one that will most likely be unbeatable when it comes to, amongst others: shorten localised value chains and production expenses, increase resource efficiency and environmental sustainability by the inclusion of recycled materials and cutting on transportation costs.”
For further examples of innovative housing, take a look at our previous blog posts: