Digging the trench for the foundation of the wall.

Laying in 6 inches of # 10 crushed stone.

Rammed earth construction is done by packing layers of moistened soil into a form. The soil or mixture of soils must be non-organic and have a clay content of 20-30 percent with the remainder being sand and fine aggregate. Hydrated lime and/or Portland cement is also added (about 10% of the overall volume of soil) as a stabilizer.