In Haiti, where progress to rebuild after 2010 was painfully slow, a nonprofit developed a new process to build more efficiently. But it realized that the pace of traditional construction would always hamper its ability to address the global need for better housing. After analyzing various options to speed up construction and decrease costs—including prefab homes—the team realized that 3D printing could be a viable solution. Now the nonprofit has developed a machine that can build walls and floors by squirting layers of concrete and can finish a house in a day or less. Adding a conventional roof, windows, and utilities can be completed a day later. After testing the machine and creating a small, yet beautiful, home in Austin, the startup will now go to an unnamed location in South America to build a community of 3D-printed homes for families currently living in substandard, shack-like housing.