Meet the KamerMaker. You aren't going to find it for sale anywhere, since it's a totally custom item with a very unique ability. It is an enlarged Ultimaker 3D printer capable of building room-like structures from PLA. The word Kamermaker is Dutch for "room maker" and while it can't print an entire room in one piece, it can print large components. The build area for the KamerMaker is 6.6 ft x 6.6ft x 11.5ft and the printer is enclosed within a movable metal pavilion.
When the KamerMaker pavilion isn't traveling, it sits outside the DUS Architects building in Amsterdam. They offer regular printing demonstrations in all kinds of weather including rain and snow. The demonstrations so far have been well received, gathering large crowds who want to watch the printer work.
As impressive as the KamerMaker is, it wasn't created only to satisfy the curiosity of crowds. The printer is a cooperative effort between DUS Architects, Ultimaker and Fablab Protospace, among others. Their mission is to explore the possibility of creating temporary and permanent housing from recycled materials.
They produced a video detailing their plans for the KamerMaker. You can take a look at it here:
Aside from developing temporary housing for emergency relief, they also plan to construct the world's first 3D printed canal house in Amsterdam.
According to the official calendar, they are supposed to be in the process of printing the ceiling and roof pieces for the reception room in the canal house. It looks like they may be running a little behind schedule, but they did mention they are in the process of testing out several custom made extruders.
You can take a look at one of their recent extruder tests here:
The extruder design they are testing in the video is based on a regular Ultimaker extruder, but it has been adapted to accept three filaments of plastic rather than one. The extruder was assembled from 3D printed parts and laser cut wood pieces.
Once the team has the extrusion process corrected they will continue the work of printing out the canal house. If you'd like to keep up with their progress you can follow them on Facebook.