Lay perforated drainage tubing at base Water-soaked soil is the worst enemy of retaining walls because it exerts enormous pressure behind the wall. Adding good drainage behind block or stone walls is crucial for long-lasting, bulge-free walls.
Add cap blocks to the top row of a block or stone retaining wall. You can add a layer of masonry adhesive to hold them in place, then back fill. Or you can backfill as you go, then add the cap. Either (Patio Step Retaining Wall)
Water drainage is a major issue for many homeowners. Poor drainage can cause all sorts of problems, including basement flooding, icy sidewalks, as well as excess seepage that can damage the foundation of your home.