Precast Retaining Wall Products That Work on Site

Whether you’re holding back soil, separating stockpiles, or building permanent perimeter walls, choosing the right retaining wall system makes all the difference.

We offer one of the UK’s most comprehensive ranges of precast retaining walls, designed to make life easier on site, shorten installation times, and deliver long-term structural performance.

Our Retaining Wall Systems

Every system in our range has a job it’s built for. Here’s a breakdown of the different types, when to use them, and what makes them work.

Bolt-Down Retaining Walls

For fast installation onto an existing concrete slab
    • Heights: 1.0 m to 5.0 m
    • Surcharge: Up to 20 kN/m²
    • Fixing: Steel bar and resin anchor system
    • Best for: Material bays, recycling yards, perimeter walls
Bolt-down units are ideal when you’re working on a prepared RC base and need a rapid solution. Just check that the slab can handle the loads – our team can assist with anchor layout and embedment guidance.
Bolt Down retaining wall render

Cast-In Retaining Walls

Becomes part of your slab – for a permanent, structural connection
    • Heights: 1.0 m to 3.75 m
    • Surcharge: Up to 10 kN/m²
    • Fixing: Reinforcement bar cast into slab
    • Best for: Silage clamps, salt barns, highway depots
These walls connect directly to your reinforcement – perfect for long-life installations where you’re pouring a new slab.
Cast-in retaining wall render.

Heavy Duty Cast-In Retaining Walls

For high loads, aggressive exposure, or longer design life
    • Heights: 1.0 m to 5.0 m
    • Surcharge: Up to 20 kN/m²
    • Spec: Consistent 250mm stem thickness, C50 concrete
    • Best for: Salt & grit storage, chemical plants, coastal sites
If you’re working to higher exposure classes or require increased durability, this is your best option.
Heavy-Duty retaining wall render
Freestanding retaining wall storage bays for Kent Council.

Freestanding Retaining Walls

Self-supporting and moveable – no fixings required

    • Heights: 1.5 m to 3.5 m

    • Fixing: None – gravity-based

    • Best for: Temporary bays, flexible yards, light-duty zones

Cast with forklift recesses, these units can be easily repositioned or relocated. Ideal for yards that change layout often.

Render of a precast Free-standing retaining wall

King Post Retaining Walls

Prestressed concrete panels between steel columns

    • Panel lengths: 3m to 6m

    • Panel thickness: 100mm to 280mm

    • Best for: Deep storage bays, narrow-footprint sites, urban yards

Flexible heights and widths make this a great solution when wall heights vary, or space is tight.

King Post Retaining Wall Render

Allegro® Interlocking Blocks

Modular, steel-free, and stackable

    • Sizes: 1.5 m, 1.6 m, 1.8 m

    • Fixing: None – interlock with tongue and groove 

    • Best for: Reconfigurable storage bays, bund walls, salt barns

Allegro® blocks are easy to install, resistant to corrosion, and ideal for modular or temporary bays. They can even be used in fire-rated areas.

Product render og a 1600m Allegro Block
Precast bolt-down retaining walls around the perimeter of a construction project.

Choosing the Right Wall System

Here’s a quick guide to help you decide:

Scenario Suggested System
Existing RC slab Bolt-down walls
New concrete slab being poured Cast-in or heavy-duty cast-in
Layout may change Freestanding or Allegro® blocks
Harsh environment (salt, chemicals) Heavy-duty cast-in or Allegro® blocks

Still unsure? Just send us your drawings – we’ll recommend the most suitable system for your project.

Built for Real Projects

We’ve supplied over 1,000 retaining wall jobs, from silage clamps in Cumbria to waste transfer stations in London. Our advice is always based on what will work on your site, not just what’s in stock.

Contact our team for expert advice

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