Floor Lifting & PU Injection
Lifting sunken concrete floors using PU injection (foam jacking / slab lifting).
Lifting and levelling sunken floor slabs with polyurethane foam – also known as foam jacking or slab lifting – is a fast, non-invasive repair method without breaking up or chiselling the floor. By injecting specialised expanding resins and foams under the slab, the substrate is stabilised and the structure raised with millimetre precision.
Your benefit
- Very small bore holes – minimal site impact
- Fast reaction – short downtime
- Controllable lifting with laser monitoring
- Low material weight vs. cement grouting
Vorteile
Warum Floor Lifting & PU Injection?
No demolition – room stays usable
Production continues, no downtime, no dust, no waste.
Mm-precise lifting
Laser-monitored, controlled lifting with sub-millimetre tolerance.
Fast curing
Material expands and hardens within minutes – fully load-bearing.
Soil compaction in one step
The expansion pressure simultaneously compacts the weak soil – two effects in one process.
Watertight & rot-proof
Closed cells – material is water-resistant, durable and rot-proof.
Cost-efficient
Approx. 30–50% cheaper than slab replacement – without disposal costs.
Many applications
From private residential buildings to industrial halls and warehouses.
How it works
How does Foam Jacking?
Lifting sunken floor slabs is done in five steps – fast, controlled and without breaking up the floor.
- 01
Drilling injection openings
Small bore holes typically up to 16 mm diameter are set in the floor slab – nearly invisible and without damaging the surface.
- 02
Material injection
A two-component, high-density polyurethane rigid foam (closed-cell) is injected through the bore holes under controlled high pressure.
- 03
Void filling
The foam spreads under the slab, displaces residual moisture and completely fills existing voids.
- 04
Hydraulic lifting
As the foam expands, it hydraulically lifts the floor slab to the required height – controlled, laser-monitored and millimetre-precise.
- 05
Curing & load-bearing
The material reaches its full load capacity in a very short time – rooms and surfaces are often usable again within minutes.
Main advantages
-
Clean & non-disruptive
Work without breaking up the floor, no dust, no rubble – ideal in occupied or used environments.
-
Fast execution
The entire process usually takes a few hours – rooms are fully usable again the same day.
-
Improved insulation
In addition to lifting, the PU foam forms an extra thermal and moisture-inhibiting layer under the slab.
Limitations & notes
-
Professional equipment required
The process requires specialised 2K high-pressure machinery and cannot be done with off-the-shelf assembly foam.
-
Experience & precision
A trained crew is essential – excessive pressure or uneven lifting can damage the slab.
Where we work
Private, commercial, industrial – we come to you with the right equipment.
Industrial floors, warehouses, workshop areas
Loading ramps & loading zones
Walkways, driveways, garage floors
Patio slabs & outdoor areas
Void filling under concrete slabs and screeds
Stabilisation against erosion & soil loosening
Levelling trip hazards
Bereit für Floor Lifting & PU Injection?
Kostenloses Angebot innerhalb von 24 Stunden.
Alles aus einer Hand
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