This beautiful earth bag home contains 450 ft² of space and was built for less than $5000. Recycled or salvaged materials were used wherever it was possible (i.e. the door and flooring). The rounded shape provides great stability for the entire structure, and two rows of concrete bags reinforced with barbed wire provide a solid grounding. Here's a step by step of the build... Starting on a rubble trench foundation. Railroad ballast was used for the rubble... Covering over our sediment fabric with pea gravel... Two rows of stem wall using 80 lb sacks of concrete. 2 strands of barbed wire go between every row. The