Why choose Cast-in retaining walls?
Cast-ins are the permanent option when you’re pouring a new floor slab and need walls that are built in from the start.
- No additional fixing needed – no bolts, resin, or anchors required. The concrete floor provides the support, simplifying and speeding up installation.
- Lighter and easier to handle – narrower toes mean each unit weighs less than a bolt-down, allowing more to be loaded onto each wagon and moved around site with less effort.
- Flexible layouts – 90° corner units available at all heights make it easy to build bays and L-shaped layouts.
- Weatherproof joints – joints can be sealed to contain material and improve durability, giving you more options for storage.
- Trusted performance – designed for surcharge capacities up to 10 kN/m², cast-ins provide the strength needed for medium-duty storage and civils projects.
- Long service life – built in C50 concrete with a 50-year design life, providing assurance that once in place, the wall will perform for decades.
Whether you’re creating storage bays, retaining earth, or a perimeter wall, you’ll get:
Response from the team within 4 working hours
Full technical support, including product datasheets, O&M manuals and CAD files
Short lead times with UK-wide delivery
Retaining walls designed for projects with new concrete floors
If you’re pouring a new reinforced concrete floor, cast-in retaining walls give you a seamless way to build strength straight into the slab.
Each precast unit arrives with reinforcement exposed at the toe, enabling it to connect directly with the slab reinforcement before pouring. Once the concrete has cured, the wall is securely fixed in place – no bolts, anchors, or additional fixings required.
Shorter toes than bolt-downs and easier to handle, allowing you to fit more units per load. This makes them simpler to manoeuvre on-site and reduces transportation costs, saving you both time and money.
Product Features & Specifications of Cast-In Retaining Walls
Cast-in retaining walls are designed to be tied into new floor slabs, creating permanent, stable walls without additional fixings. Here’s what makes them effective.
Heights: 1.0m to 3.8m
Seven standard heights offer flexibility in designing walls that suit your project. Supplied in 1m long units, you can achieve the precise length and height you need without overbuilding or wasting resources.
Corner units: 90° fixed corners
Cast-in retaining walls are available with 90° fixed corner units at all standard heights. This makes it easy to create strong, permanent storage bays or L-shaped layouts without needing custom details. With corners designed into the system, you can build neat, continuous walls that save time on site and give you a professional finish.
Material density: Up to 18 kN/m³
Suitable for storing and retaining most common bulk materials. This covers most commercial and agricultural applications where cast-ins are typically used.
Surcharge capacity: Up to 10 kN/m²
Cast-in walls are designed for medium-duty storage and retaining applications. They strong enough for aggregates, soils, crops, and similar materials, making them a reliable choice for civils and commercial projects requiring a permanent wall.
Concrete strength: C50 mix
High-quality concrete provides durability, long-term strength, and crack resistance. Factory-controlled mixing guarantees each batch meets the same high standards, lowering the risk of defects on site.
Connection: Cast into a reinforced concrete slab
Each unit is manufactured with exposed reinforcement at the toe. When tied into the slab reinforcement and poured into the new floor, the unit becomes part of the slab itself. This permanent connection eliminates the need for anchors or bolts and guarantees long-term stability.
Design life: 50 years
Cast-in walls are designed for a 50-year service life. Once installed, you can depend on them to perform well for decades without requiring expensive replacement or significant maintenance.
Reinforcement cover: 30mm minimum
Reinforcement is protected by a 30mm concrete cover, helping to prevent corrosion and increase durability in accordance with UK standards.
Fire resistance: 30 minutes
Providing reassurance in commercial and industrial settings, cast-in walls can withstand fire for up to 30 minutes, offering you additional confidence in their durability.
Edge detail: Square edges
Units are manufactured with square edges, which means neat alignment and consistent spacing. This allows walls to be installed closely together with predictable joints, making finishing work easier.
Finish: Smooth mould finish
The front face is mould-finished, providing a clean, professional look. The rear face is hand-trowelled, maintaining production efficiency while ensuring the wall’s visual face looks right.
Foundation type: Reinforced concrete slab
Cast-in walls must be installed into a new RC floor slab. Once poured, the wall is permanently secured to the floor, offering long-term stability and strength.
Wall Sizes, Dimensions & Product Range
Cast-in retaining walls are supplied in 1m sections, with standard heights ranging from 1.0m to 3.8m. The slimmer toes make units lighter, easier to handle, and allow more per load compared to bolt-downs – reducing haulage costs and improving site efficiency.
| Height (mm) | Length (mm) | Width (mm) | Weight (kg) |
|---|---|---|---|
| 1,000 | 1,000 | 700 | 830 |
| 1,500 | 1,000 | 700 | 920 |
| 1,750 | 1,000 | 700 | 1,000 |
| 2,000 | 1,000 | 700 | 1,120 |
| 2,550 | 1,000 | 700 | 1,320 |
| 3,200 | 1,000 | 900 | 1,620 |
| 3,800 | 1,000 | 900 | 1,770 |
A Partner You Can Trust
We’ve supplied precast retaining walls for over 18 years, delivering more than 1,000 projects across the UK. Contractors, farmers, and engineers come back to us because we’re straight-talking, reliable, and invested in getting projects done right.
Off-site production also means less disruption, less waste, and reduced dust on site – making projects cleaner, safer, and more efficient for everyone involved.
Typical Applications
Cast-in retaining walls are a permanent solution widely used across the UK. They’re ideal for bulk storage bays where strength and durability are essential, earth retaining walls for landscaping or boundary projects, and waste & recycling yards where hard-wearing walls are needed every day.
Bulk Storage Bays
Earth Retaining Walls
Waste & Recylcing
Paul Prescott - Prescott Groundwork & Civil's
Handling & Installation
Cast-in walls are simple to handle and quick to set into a new slab.
- Delivered UK-wide direct from Nottingham.
- Offloaded and positioned with a telehandler or 360 excavator using cast-in lifting points.
- Supplied with 2 x 2.5T lifting clutches and 1 x bolt-through lifting eye per order for safe handling.
- Units are tied into the reinforcement of the new floor slab before pouring concrete.
Cast-In Wall Media Pack
Our media pack includes the cast-in brochure, handling guide, O&M manual and safety data sheet all in one document.
Everything you need to plan, specify, and install the product with confidence.
Questions We Get All The Time
Aggregates, soils, crops, silage, and most bulk materials up to 18 kN/m³ density. For higher-density loads, we may suggest another wall system.