Some retaining-wall blocks have locking mechanisms that allow them to be built to about 4 feet tall without extra engineering. Because we used tumbled blocks with no locking mechanisms, we used a construction adhesive on alternate courses. Remember, with locking blocks, you can remove blocks and start over if you make a mistake. But adhesive permanently bonds blocks, so work carefully.
a concrete block retaining wall is the perfect solution to control erosion, to eliminate a hard-to-mow slope, to add a planting bed, or to level an ideal patio area. these systems are easy to install, durable, reasonably priced and available in a variety of colors and textures. this article shows you how to install one in a weekend.