How to Design a Storage Bay That Works
The smarter way to build storage bays with precast walls
Designing and installing storage bays doesn’t have to be complicated. The key is finding a solution that gives you the strength and durability you need without blowing the budget or tying up your team for weeks.
We’ve worked on hundreds of storage bay projects, from grain and silage clamps to waste recycling, and salt storage, and the same questions come up every time:
- What’s the best wall type to use?
- Can it handle the material I’m storing?
- How easy is it to install and maintain?
This guide walks you through the best options for creating cast-in concrete storage bays using our standard and heavy-duty retaining wall systems.
Why Choose Cast-In Retaining Walls for Storage Bays
Cast-in retaining walls provide a permanent solution designed to withstand material loads, repeated vehicle traffic, and the UK’s environmental conditions. Each wall unit is positioned before pouring a reinforced concrete slab around the toe, securing the unit as part of the foundation.
Because the toe is cast into the slab, there’s no need for mechanical fixings and no toe obstructing bucket movement during loading.
They’re ideal for:
- New-build silage clamps
- Salt, sand & aggregate storage
- Waste bays & recycling yards
- Long-term grain storage
What Is a Cast-In Retaining Wall?
Each precast unit is manufactured with exposed reinforcement at the toe. This allows the wall to be securely tied into the mesh reinforcement of a poured floor slab, forming a monolithic structure that acts like a cantilever wall.
No fixings are needed after installation. Once the slab is poured and cured, the wall becomes fully integrated into the base.
Single vs Double Load Options
We offer two types of cast-in wall construction depending on the loading direction:
| Load Type | Suitable For | Reinforcement | Cost Efficiency |
|---|---|---|---|
| Single Load | Material stored on the toe side | Single layer | Lower cost & lower COâ‚‚ |
| Double Load | Material stored both sides | Double layer | Higher strength |
Single load walls should always be installed with the toe on the same side as the retained material. Double-load units are reinforced to retain material on both faces.
Standard vs Heavy-Duty Cast-In Walls
| Standard Cast-In Walls | Heavy-Duty Cast-In Walls | |
|---|---|---|
| Wall heights | 1.0 m to 3.8 m | Up to 5.0 m |
| Surcharge capacity | Up to 10 kN/m² | Up to 20 kN/m² |
| Reinforcement cover | 30mm Standard | Option to increase cover and extend design life |
| Watertight joint option | Not available | Hydrophilic strip option |
| Typical applications | Aggregates, grain, dry waste | Silage, slurry, earth |
Planning a Bay Layout That Works
Using cast-in walls, you can create:
- Push-wall bays for loader access
- Dividing walls for storing multiple materials
- Enclosed U-shaped bays with back and side walls
- External boundary walls integrated with your slab
All units are 1 metre wide, with standard heights ranging from 1 metre to 3.8 metres. Heavy-duty options go up to 5 m.
Installation Sequence for Cast-In Walls
01. Prepare strip footing – Create a compacted base with a shuttered or formed strip for wall placement.
02. Position units – Set wall units onto the footing, aligning and shimming as needed to level.
03. Tie into mesh – Connect exposed reinforcement from each toe into the slab steel.
04. Pour concrete – Pour the slab, securing the units in position.
05. Seal joints – Use an appropriate mastic to seal the vertical joints between units.
No fixings needed after the pour. The floor becomes part of the wall.Â
How Much Do Cast-In Walls Cost?
Price varies depending on height, specification, and load rating. As a guide:
1m high units start at £150/m² plus VAT, including delivery within 100 miles of Nottingham. Heavier units and HD systems will cost more due to increased concrete volume and reinforcement.
Get in touch and we’ll provide a quote based on your wall height, length, and whether you need single- or double-load capacity.
Final Thoughts: Save Time, Cut Costs, and Build It Right
Cast-in retaining walls offer a smart, permanent solution for high-strength storage bays. With fewer materials, quicker installation, and built-in reinforcement, they are ideal for:
- Silage clamps
- Waste transfer stations
- Salt & grit bays
- Aggregate & grain storage
Our team will help you choose the right wall system, provide layout advice, and quote for delivery.
