Bamboo Shield is a diversion type control method with a smooth surface on the side facing your bamboo planting. It is made from HDPE, high-density polyethylene. Superior to metals because it will not rust and easier to install.
Bamboo roots typically travel in the first 12 inches of topsoil. Barrier are sold in 24″, 30″, and 36″ depths to provide extra protection from arrant growth.