Power floated concrete floor: process, cost per m², specification and fibre reinforcement

A power floated concrete floor is a poured concrete slab finished by machine with a power float (power trowel) into a dense, flat, hard-wearing surface without a separate screed. Power floating starts once the bleed water has evaporated, usually 2 to 6 hours after the pour. Poured and power floated, it costs indicatively €45 to €90 per m² (2026 price level).

What is a power floated concrete floor?

In a power floated concrete floor, the structural slab is the finished surface. Directly after pouring and levelling, the surface is worked in several passes with a power float: a machine with rotating blades that compacts, closes and smooths the top layer. The result is monolithic power floated concrete: flat, low-dust and hard-wearing, and the standard finish for industrial halls, workshops, garages and, increasingly, residential floors. In Flanders the same floor is known as a "gepolierde betonvloer", even though it is finished fresh rather than polished afterwards.

Power floating is therefore fundamentally different from laying a sand-cement screed: a screed is a separate, non-structural layer on top of the structural slab, whereas the power floated slab is structure and finish in one. That floor-in-one-operation is called a monolithic floor; the full build-up with dosages and joint plan is set out in our article on the monolithic industrial floor. The adjacent flooring topics can be found within the pillar applications and target groups.

Because nothing goes over it, every square centimetre counts when finishing the concrete floor: the quality of mix, pour and float work is directly the final appearance. That is exactly why the choice of reinforcement, mesh or fibres, plays such a major role in power floated floors, as becomes clear below.

What is power floating? Power float, power trowel and helicopter

Power floating is the machine finishing of fresh concrete once the bleed water has evaporated: rotating float pans first flatten and close the surface (floating), after which steel blades densify it and give it a sheen (trowelling). A power float floor is therefore finished on the same day as the pour, while the concrete is still workable.

The machine itself is a petrol or electric motor driving a set of rotating arms with steel blades, which typically turn at up to about 150 rpm. For floating, a flat round pan is fitted under the blades; for trowelling, the pan comes off and the blade pitch is raised pass by pass, typically starting at around 5 to 10 degrees. Power float, power trowel and "helicopter" are all names for the same machine, and the process is also written as one word: powerfloating. Garages and small floors are worked with a walk-behind machine; large warehouse floors with twin-rotor ride-on machines that cover far more ground per pass.

The two stages do different jobs, and a specification should say which one it expects. Floating with the pan trims high spots, fills low ones and closes the surface into a dense, matt finish. Trowelling with the blades compresses the top millimetres further; with each steeper pass the surface becomes tighter and smoother, from satin to gloss.

Where power floated concrete floors are used

Power float flooring is the obvious choice wherever a flat, dense and easy-to-clean floor is needed without the cost of a separate screed or coating. The main applications:

• Warehouses and industrial floors: flatness for racking and forklift traffic, and a wearing surface that needs no topping. Build-up, dosages and joints are covered in our article on fibre reinforced industrial floors.

• Garages, car parks and workshops: the dense surface is easy to sweep, slows the ingress of water and, once impregnated, resists oil. See garage floors and car parks for the fibre choice under de-icing salt.

• Agricultural buildings: here the finish has to balance grip against cleanability, because an over-smooth surface is slippery in a wet barn. More in barn and farm floors.

• Greenhouses: floors and main paths are poured on sand and power floated in one operation, giving hygienic, easy-to-clean surfaces. See greenhouse floors.

• Homes and extensions: a power float floor as the finished floor, with the nuanced grey of fair-faced concrete, usually impregnated afterwards.

• The base for a polished floor: a flat, well-finished power floated slab with few cracks is the best starting point for grinding and polishing later (see power floated vs polished concrete below).

Patios, driveways and other outdoor slabs follow different rules and are covered in a separate article on power floated concrete outdoors.

Power floating a concrete floor: the process step by step

Power floating a concrete floor is all about timing. The concrete must have stiffened enough to carry the machine and the bleed water must have evaporated, yet the top layer must still be plastic enough to be closed. A typical timeline for power floating concrete on a pour day:

• Pouring and levelling: the concrete is spread, compacted and brought to level and flatness with a screed rail or laser screed.

• Waiting (around 2 to 6 hours): depending on temperature, mix and weather. Readiness test: power floating can begin once a boot heel leaves only a slight impression of a few millimetres, around 3 mm according to Concrete Society guidance, and no water comes to the surface.

• First pass, floating: with float pans, the surface is ground flat, high spots are trimmed and fine mortar is worked to the top to close the surface.

• Subsequent passes, trowelling: with finishing blades set steeper with each pass, the top layer closes and the surface starts to shine. The passes overlap, so that no strips are left unworked. Large floors are worked with twin-rotor ride-on power floats.

• Edges and details: along walls, around columns, drains and upstands, where the machine cannot reach, the surface is hand-trowelled in the same window.

• Curing: immediately after the final pass, a curing compound is applied or the floor is covered with sheeting, so the young concrete does not dry out too quickly.

Starting too early or too late both show in the finished floor. Too early, and the machine tears the surface or works bleed water into the top layer, leaving a weak skin that can dust or delaminate later. Too late, and high spots can no longer be trimmed and the surface will not close, however many passes follow.

Power floating is a same-day operation: it cannot be put off until the next day, because by then the concrete has hardened. In cold weather the whole window shifts by hours, and float work running late into the evening is the rule rather than the exception, so plan the crew and lighting for it. Within 24 hours of the pour, the contraction joints are sawn to about a quarter to a third of the slab depth. Which slab thickness suits which use, from garage to heavily loaded hall, is covered in how thick a concrete floor needs to be; the complete route from ordering to curing is in our guide to pouring fibre reinforced concrete.

Power floated finish compared with other concrete finishes

In UK practice, "power floated" is used for the whole machine finish. Specifications and Concrete Society guidance are more precise: they distinguish a floated finish, made with the pan and giving a matt surface with faint circular swirl marks, from a trowelled finish, made with the blades and giving a closed, dense, satin to glossy surface. The table sets the power floated concrete finish against the other common options.

Which finish suits which use? A pan finish fits garages, workshops and farm buildings where some grip matters; a trowelled finish fits warehouses and indoor floors that must be dense, low-dust and easy to clean; a broom finish belongs outdoors, on ramps and in wash-down areas. More trowel passes are not automatically better: the Concrete Society notes that too many passes can give the surface a burnished appearance.

Floated concrete: hand float, power float or trowel

Floated concrete is concrete with a float finish. On small slabs, the finisher works the still-plastic concrete with a wooden or magnesium hand float, which gives a flattish, lightly textured surface. A power float does the same job by machine, but later, because the slab first has to be stiff enough to carry the machine. Trowelling follows floating when a dense wearing surface is needed.

A floated concrete floor is a finish, not a floating screed: that is a screed laid on a layer of insulation, separate from the structural floor.

Two limits from Concrete Society guidance are worth knowing. Trowelled finishes are generally not suitable for external paving, and power trowelling air-entrained concrete, the usual choice where frost exposure is expected, risks delamination of the top layer.

Power floated vs polished concrete

The two are often confused, but they are different processes. Power floated concrete is finished fresh, on the pour day, with one machine. Polished concrete is hardened concrete that is ground in several stages with diamond abrasives, treated with a densifier and sealed, days or weeks after the pour. Polishing produces a more reflective, decorative floor, optionally with exposed aggregate, and it is dearer because of the extra grinding stages. UK cost guides quote in the region of £135 to £150 per m² for a new polished concrete floor (indicative).

They are not mutually exclusive: a power floated floor can be ground and polished later. The better the slab, the better the polished result, so a flat power floated slab with little shrinkage cracking is the best base. That is where a micro fibre in the mix earns its place, as explained in the fibre section below.

Power floated concrete floor specification: what to specify

A power float finish specification needs more than the words "power floated". State the loads, slab thickness, concrete, reinforcement, finish, flatness, joints and curing, so that quotes can be compared like for like and the finished floor can be checked at handover.

Industrial floors with racking and forklift traffic are specified by flatness class and surveyed at handover. In the UK the reference is Concrete Society TR34, with free movement classes for general warehousing, where FM2 is commonly specified, and defined movement classes for narrow-aisle racking. Fibre dosage per load class is set out in our article on the monolithic industrial floor, and the general rules in concrete fibre dosage. For high point loads, the structural engineer designs the thickness and reinforcement.

The dosage ranges in the table match those of Promicro (micro fibre), TwistR (synthetic macro fibre) and the MPZG HT+ 35/0.55 steel fibre; the fibre section below explains when to use which.

Power floated concrete floor cost per m² (2026)

The price depends on area (delivery and machine costs weigh heavily on small floors), slab thickness, flatness requirements and reinforcement. As an indication for the Dutch market, 2026 price level and depending on the project:

• Plain concrete: around €110–165 per m³; for a 150 mm thick floor that converts to some €17–25 per m² in material.

• Power floating as a separate item: indicatively €10–20 per m² in labour and machine deployment, strongly dependent on area and required finish quality.

• Complete monolithic floor, poured and power floated: around €45–90 per m², including concrete and finishing, excluding groundworks and foundation.

• Fibre reinforcement: a micro fibre at 0.6–1.0 kg/m³ amounts to only 90–150 g of fibre per m² in a 150 mm floor, a minor item next to the concrete; structural steel fibres come to in the order of €1–8 per m² at common dosages, offset by dropping the purchase and laying of reinforcement mesh.

What drives the price of a power floated floor:

• Floor area and minimum charges: pump, machine and crew costs are largely fixed per pour, so small floors cost more per m².

• Slab thickness: it sets the volume of concrete per m².

• Flatness class: a tighter class means more passes, laser screed equipment and a flatness survey at handover.

• Access and pumping: whether the truck mixer can discharge directly or a concrete pump is needed.

• Reinforcement: mesh (purchase plus fixing) or fibres added at the plant.

• Out-of-hours finishing: in cold weather the float crew often works well into the evening.

• Weather protection: sheeting and windbreaks against drying out, or frost protection in winter.

A worked example, in quantities only: a 32 m² garage floor (4 × 8 m) at 120 mm thick needs 3.84 m³ of concrete. With a micro fibre at 0.6–1.0 kg/m³ that is 2.3–3.8 kg of fibre; with a synthetic macro fibre at 2–6 kg/m³ it is 7.7–23 kg.

In the UK, contractors usually quote per project rather than per m². To compare quotes, ask for a price per m² that states the slab thickness, the finish (floated or trowelled) and the flatness class. Compared with polished concrete, power floating is the cheaper route, because it is done in one visit on the pour day without grinding stages afterwards.

For current concrete prices, see concrete price per m³. With the savings calculator you compare the cost of TwistR fibre reinforcement with traditional steel mesh per m²; for a project price, request a quotation.

Drawbacks of a power floated concrete floor and how to deal with them

A power floated floor is practical and hard-wearing, but no miracle cure. Like all power floated concrete floors, it has a few drawbacks that are best known in advance:

• Shrinkage micro-cracks: concrete shrinks as it hardens, and in a tight, glossy surface every hairline crack stands out. Plastic shrinkage cracks in the first hours can be prevented with a low dosage of micro fibres; drying shrinkage is managed with joints sawn in good time and proper curing.

• Slipperiness: a tightly trowelled surface becomes slippery when wet. Indoors that is rarely a problem; around dock doors, wash bays or outdoors, the floor is deliberately trowelled less tightly or lightly roughened.

• Colour variation and mottling: the slightly cloudy, nuanced grey is inherent to monolithic concrete. The shade differs per pour and per weather situation; anyone expecting a uniform colour as with a resin floor will be disappointed.

• Repairs remain visible: a power floated floor has only one finishing moment. Cracks can be injected and patches repaired, but the repair always shows in the surface; see repairing cracks in a concrete floor.

• Weather-dependent: wind, sun and low humidity on the pour day increase the risk of micro-cracking and shorten the floating window.

• Dusting: a correctly floated and cured slab should not dust. A dusty surface usually points to poor curing or to finishing at the wrong moment, when bleed water was worked into the top layer.

• Delamination: a thin top layer that sounds hollow and later flakes off. The usual causes are trowelling before the bleed water has gone, which traps water and air under a closed skin, and trowelling air-entrained concrete.

The common thread: most drawbacks revolve around cracking and surface quality, which is precisely the territory of good timing, proper curing and fibre reinforcement. Why those cracks form in the first 24 hours and how to prevent them is covered at length in preventing plastic shrinkage cracks.

Why fibre reinforcement and power floating go so well together

Monolithic floors in power-floated concrete are quintessentially fibre reinforced, for three reasons directly related to the floating process.

No top mesh to obstruct the finisher

With traditional reinforcement, a mesh (or top mesh) lies a few centimetres below the surface, precisely in the zone where the power float works and where spacers can shift during the pour. A mesh that sits too high shows through in the surface or is even exposed during floating. Fibre reinforcement without a top mesh to obstruct the finisher, such as the structural synthetic fibre TwistR (2–6 kg/m³), arrives ready-mixed from the truck mixer: the formwork can close straight away, the pour is one continuous operation and the finisher has a homogeneous mix with no obstacles in the top layer.

Micro fibres protect the surface in the critical hours

Between the pour and the final floating pass, the fresh surface lies open for hours. This is the phase in which plastic shrinkage cracks form as soon as the surface dries out faster than the bleed water can replenish it. A micro fibre against plastic shrinkage during power floating such as Promicro (0.6–1.0 kg/m³) lays a network of millions of fine filaments through the concrete that absorbs those early tensile stresses. An added benefit finishers see immediately: the mix stays more cohesive, with less ponding and a denser, more tightly closed surface.

For power floated fair-faced work, deliberately choose a monofilament micro fibre rather than a fibrillated one: loose, smooth 12 mm filaments disperse very finely and remain virtually invisible at the surface, whereas the mesh-like fibrillated fibre (strong in sand-cement and semi-dry mortar) can show more coarsely in ready-mixed concrete. The few synthetic fibres visible directly after floating wear away in the first weeks of use.

Steel fibres in a power-floated floor

For heavily loaded power floated floors, with forklift traffic or pallet racking, steel fibres in a power-floated floor are the structural standard. A hooked-end high-tensile fibre such as the MPZG HT+ 35/0.55 (10–35 kg/m³, conforming to EN 14889-1) reinforces the entire volume, right into edges and corners where a mesh, because of the cover requirement, just fails to reach. With correct float work, the fibres are worked into the top layer and pressed below the surface; in practice, the steel fibre is often combined with a micro fibre, so that structural reinforcement and surface protection come together in one pour. And because steel fibres absorb the shrinkage stresses across the whole bay, larger bays can be poured with fewer sawn joints: every joint fewer is one less maintenance point in the tight surface. Whether steel fibres or synthetic macro fibres suit your floor better depends on the loads, the exposure and the joint layout.

Sealing a power floated concrete floor: impregnate, seal or coat?

Freshly power floated concrete is dense, but not liquid-tight. Two common follow-up steps:

• Impregnating (a penetrating sealer): an impregnation agent penetrates the pores and makes the floor resistant to dirt, oil and moisture without materially changing its appearance; the floor remains vapour-open. Common for garages, workshops and residential floors. It can usually be applied a few weeks after the pour, once the surface is sufficiently dry.

• Coating: an epoxy or PU coating forms a closed layer for chemical exposure or liquid-tightness (wash bays, food industry). A coating makes higher demands: the floor must have dried far enough (allow in the order of weeks to months, depending on thickness and climate) and the smooth power floated surface is first roughened for adhesion.

The same applies to floor paint. A smooth, closed power floated surface gives paint and coatings little to grip; without mechanical preparation, by shot blasting or grinding, or a primer made for dense power floated surfaces, the layer will not bond properly.

For most power floated floors, impregnating is the logical choice: it preserves the concrete look and is easy to repeat later. Choose a coating only if the conditions of use demand it; otherwise you are coating away the floor's key quality, its monolithic surface.

Power floated concrete outdoors

Everything above applies to indoor floors. Outdoors, on a terrace, driveway or garden path, extra rules apply: the surface is deliberately finished slightly rougher against slipperiness in rain, the slab gets a fall, and the reinforcement must withstand permanent moisture and frost exposure. A closed trowelled finish is avoided outside in favour of a floated or broom finish, and air-entrained concrete for frost exposure is not power trowelled, because of the delamination risk. Corrosion-free synthetic fibres have the advantage there; how to pour a power-floated concrete floor outdoors without reinforcement mesh, including thicknesses, colours and the difference from a chape, is covered in a separate article.

From pour plan to a tight floor

A good power floated floor is made before the power float turns: a mix with controlled bleeding, a well-considered joint plan, curing straight after the final pass, and reinforcement that does not get in the way of the float work. The practical route: choose a monofilament micro fibre for surface quality and, depending on the loading, a structural synthetic or steel fibre for the reinforcing work; high point loads call for a calculation by the structural engineer. The selection guide turns your situation into a fibre recommendation in a few steps, or submit your pour plan via a quotation request: we advise free of charge on fibre type and dosage per floor.