What are the Top Factors to Consider for a Landscape Retention Wall?

As the name suggests, a retention wall is designed to contain material such as soil and rock behind it. The idea is to eliminate the risk of a landslide, mudslide, or rockfall onto the surface beneath and to minimise the risk of flooding. The strength, material choice, design, and correct construction of the retention structure are thus imperative to guarantee its reliability and integrity. A quick look at important factors determining the effectiveness of a retention wall shows just why using our concrete retaining-wall blocks (CRBs) address the issue of the best material for the installation of the structure:

  • Foundation or base. The structure must be erected on a suitable surface. The base of the structure starts below the surface. The depth at which the base is set is determined by the height of the structure. The base must be solid, made from a mix of compacted soil and gravel.
  • Adequate backfill. The backfill is the soil or material behind the structure. It must allow sufficient drainage and consist of an appropriate aggregate such as dump rock, crushed stone, or gravel directly behind the blocks. Adequately compacted soil fills the remaining area behind the blocks. For landscaping behind the structure, put a layer of soil over the backfill.
  • Proper drainage. To prevent water from building up in the elevated section behind the retention wall, proper drainage planning is essential. The pipes for drainage must be added. Where needed, weep holes allow for controlled water flow to drain through the structure.
  • Structure height. The height of the structure determines its load capacity and the reinforcement required. If the landscape-based retention wall must be higher than allowed for by national building regulations, perhaps construct a series of structures rather than a single one. This provides the appearance of a terrace.
  • Material. The type of building material affects the load-bearing capacity, aesthetics, drainage efficiency, and height achievable. To this end, we recommend using our CRBs, which are modular concrete blocks for individual placement. These blocks can be laid at anything from a 70- to 90-degree angle for applications such as cut slopes, embankments, and ponds.

The blocks are economical, as installation is faster than having to build a brick-and-mortar structure. We offer an extensive range according to height, open-faced or closed-face installation, work-face accessibility, and the angle at which placement must be done. The blocks come standard in grey, but a wide range of colours is available on request.

View our range of products for retention walls and place your order to benefit from our current special offers.