Structural Sand Bag Walled House

Sand bags are handy in emergencies but also make great building materials – densely packed, they are great insulators and relatively easy to stack and use as framing infill in construction. The simple building techniques needed to assemble such a home make it accessible for people who lack the traditional skills to take part in constructing their own house. Sandbags can usually be purchased locally and cheaply as well, making them a more sustainable and affordable building material. (Source)