Diy Stacked Stone Wall . The cheapest way to build a retaining wall is to diy it. For other cement mixes, a shovel is fine. Free photo Stacked stone wall Piled, Rocks, Stacked Free Download from jooinn.com Use soil and good placement to secure the stones, and just as with wall joints, avoid lengthy joints in the. Multiply the length x width x height to get the cubic footage. How to build a dry stack stone wall.