How To Do A Retaining Wall With Blocks. Sure, retaining walls look like simple stacked stone, block, or timber. Building one of these walls can be fairly simple, depending on the design and size of the wall.
But in fact, they're carefully engineered systems that wage an ongoing battle with gravity.
Retaining walls were originally designed to keep landscape soil from eroding. The base of a retaining wall should be. I started out by digging a ditch 6 inches below my block height which was 6. I can buy 4 molds for about 80 dollars including shipping.