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In-situ concrete flooring

High-performance floors, laid to last.

High-performance floors, laid to last. Ground-bearing and suspended slabs, power floated finishes, large pours and external hardstandings, engineered to the flatness and strength your project demands.

The work

Floors that take the load and keep their shape

We install in-situ concrete flooring across industrial, logistics, healthcare, data centre, waste and secure projects, from single pours to phased programmes on live sites. Project values run from around £15,000 to £2m and beyond.

Every floor is set out, poured and finished by our own teams, then tested against the specified flatness and strength so there are no surprises at handover. Nothing is subcontracted. The crew that places the concrete is the crew that finishes it, which is the only reliable way to hit a tolerance on a surface that has a two hour finishing window.

Proof, not promises. You get the survey results, the cube results and the pour records, not an assurance that it went well.

On site

The floors others won't take on.

An in-situ concrete slab placed by Trent inside Catesby Tunnel.

Systems

Which floor your project needs

Four systems cover almost everything, and choosing between them is mostly a question of what the floor does for a living.

Service

Power floated floors

The default for industrial buildings. The structural slab is placed and its surface densified by float blades as the concrete stiffens, a hard, dense finish in one operation for any floor where wheeled traffic runs directly on the concrete.

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Large pour & laser screed

Same finished product, placed differently. Laser screed plant levels concrete in a single controlled pass, which gives you area and tolerance together where the programme is short and the slab is big.

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Concrete hardstanding

External slabs. Yards, service areas, lorry parks, plant bases and tipping areas, designed for HGV loads, abrasion and weather, and laid to falls so water goes to the drainage rather than sitting on the slab.

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Screeds

Not a concrete floor at all. A screed is a levelling layer laid over a base or a structural deck; an in-situ concrete floor is the structural slab itself. If the drawings show a deck with a topping over it, you want a screed.

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Scoping

The decision you are actually making

If you are pricing this, these are the questions that move the number.

  • What flatness grade is specified? It sets the plant, the crew, the pour widths and the day rate. It is the biggest single cost driver on the page.
  • Ground-bearing or suspended? A ground-bearing slab depends on the sub-base and the ground. A suspended slab depends on the deck and its deflection, and holding a tight tolerance over a deflecting deck is a different problem to holding it on the ground.
  • What is the sub-base tolerance? A slab is only as flat as what it sits on. A loose sub-base is paid for in concrete volume or in a regulating operation, and it is better priced than discovered.
  • How is the slab jointed? Joint layout, joint type and spacing are a design decision. Joints are where floors fail, and armoured joints in a trafficked bay are not the same price as sawn induced joints elsewhere.
  • Is the building live, occupied or phased? This is where most subcontractors' prices stop being comparable. A floor poured in an empty shed and a floor poured around a working operation are different jobs.

Standards

Flatness grades, named

Floor specifications in the UK normally point at the Concrete Society's Technical Report 34, currently in its 4th edition. TR34 controls flatness and levelness separately: Property E for levelness and Property F for flatness. The specification names the class, and the finished floor is surveyed against it.

The class follows the use: general warehousing sits at one level, high-bay and very tight-tolerance work at another. Where trucks run fixed routes in very narrow aisles, a defined movement specification applies instead and the floor is surveyed differently.

Screeds are a separate standard. Surface regularity for screeds is specified to BS 8204, measured as the maximum deviation under a 2m straightedge.

Finished floor placed by Trent across a steel-frame upper deck

Capability

Plant and crews, self-delivered

Everything is done by our own operatives with our own plant. That is not a slogan, it is the reason the tolerances hold.

Our plant includes a Somero S22EZ laser screed for large area placing, ride-on and walk-behind power floats, our own concrete line pumps, and our own track-mounted placing booms, rare kit in this country. The booms are what let us reach upper decks and restricted spaces that other subcontractors cannot get to, which is how we end up on the projects other people turn down.

We take on the floors others won't. More on the company and the plant at about Trent.

Delivery

Output, programme and constraints

Output depends on the system, the grade and the site, so we programme from the finishing window backwards, because on a concrete floor the finish is the constraint rather than the delivery schedule. Then we give you the honest duration. If the programme handed to us does not work, you hear it at tender.

Live sites

Buildings that keep operating while we work. Phasing, access windows, agreed routes, noise and dust control, and a method statement written around the operation rather than against it.

Restricted access

Where ready-mix cannot reach the pour, our line pumps and placing booms will. Reach is a capability, not an add-on, and it is planned into the works from the start.

Occupied buildings

Hospitals, schools and operational facilities where the working day belongs to somebody else. Clean methods, out-of-hours windows where needed, and honest programming.

Phased programmes

Floors delivered in sections around other trades, with joints and pour sequence designed to suit the phasing rather than fighting it.

Proof

Evidence and documentation

  • Flatness survey against the specified TR34 classification
  • Concrete cube results for compressive strength
  • Pour records: date, bay, volume, mix and conditions
  • Joint layout as constructed
  • Curing method and durations
  • RAMS issued and agreed before mobilisation
  • Sign-off pack at handover

We are Constructionline Gold registered, Avetta and SSIP accredited, and a member of the Nuclear Industry Association. We work for Tier 1 main contractors including VINCI, McLaren, Costain, Kier, Interclass, Tomlinson, SMD, Actavo, Tarmac and Veolia.

If you tender flooring projects regularly, how we work with main contractors sets out what we commit to and what you get.

FAQs

Common questions

What is the difference between a screed and an in-situ concrete floor?
A screed is a levelling layer laid over a base or deck. An in-situ concrete floor is the structural slab itself, often power floated to a hard, durable finish. We deliver both.
What flatness grades can you achieve?
We work to the TR34 free movement classification the specification names, survey the finished floor and issue the results.
Do you self-deliver or subcontract the work?
We self-deliver, with our own operatives, plant and placing booms, so we keep control of quality, programme and method.
Can you work on live and restricted sites?
Yes. Delivering floors in live, restricted-access and constrained environments is our specialism.
Do you install both ground-bearing and suspended slabs?
Yes, including on metal deck and precast systems, to the strength and tolerance specified.
What project values do you work at?
Roughly £15,000 up to £2m and beyond, from a single pour to a phased national programme.

Got a flooring or screed project coming up?

Send us the drawings and the specification, and we'll tell you straight whether we can deliver it, and how.

Discuss your project