Stackable retaining wall blocks feature flat tops and bottoms and a lip along the back to make stacking easy. The lip on the back helps hold the bricks in place to construct multi-level retaining walls.
The front edges of stackable retaining blocks look like natural rocks or have decorative finishes. They come in a variety of sizes, style and colors, allowing the user to find blocks that match the landscape and design of the project. The blocks are typically made of concrete so that they are durable enough for outdoor landscaping features. The stackable retaining blocks work for walls up to about 3 or 4 feet high. Higher walls require a different method with more support so they don't collapse or tip.