Contour Crafter is house 3d printer. It prints buildings. It can print 2,500 sqft house in 20 hours. Wow! Coming soon to construction site near you. It will change economics of construction business, design of houses, better structural strength, save lives and make houses cheaper.
Detailed TED presentation by Behrokh Khoshnevis (http://www.bkhoshnevis.com/)
If you need more detailed documents take a look at:
here is a video from CNN:
Looks like US Navy is also funding this project. Military needs rapid deployment cheap buildings ...