The Hexayurt Project is looking to house more people more efficiently. This simple housing design maybe able to help the world’s poor.
The Hexayurt is a prize-winning shelter you can build yourself for about $200 (cache). Suitable raw materials include common building materials (insulation boards,) hexacomb cardboard and plastic. You cut six 4′ x 8′ panels in half diagonally to make the roof, and use six more whole panels to form the walls. It takes about two hours. The design (cache) is in the public domain.