A sinking patio slab that has become a trip hazard, or an uneven driveway that pools water after rain — these problems don't require expensive, disruptive replacement. Concrete lifting is the modern, minimally invasive solution that fixes sunken concrete quickly, affordably, and without the mess of demolition and re-pouring.
What Is Concrete Lifting and How Does It Work?
Concrete lifting is a precision engineering process used to raise and re-level sunken concrete slabs by injecting structural material underneath them. Rather than accepting uneven surfaces or paying for full replacement, this technique addresses the root cause of settling — the voids and erosion beneath the slab — whilst restoring it to its proper position.
The modern industry standard uses high-density polyurethane foam injection. This represents a significant advancement over older mudjacking methods, delivering stronger, more durable repairs with smaller access holes and faster cure times.
What Are the Steps in the Polyurethane Concrete Lifting Process?
Step 1 — Small holes are drilled: Technicians drill strategically placed holes through the sunken slab, each approximately the size of a 5p coin. These tiny access points minimise aesthetic impact compared to the large holes required by older repair methods.
Step 2 — Polyurethane foam is injected: A specialised two-part polymer mixture is injected through the holes using precision equipment. The liquid polyurethane immediately begins its chemical reaction, preparing to expand and harden beneath the slab.
Step 3 — The slab is gently lifted: The expanding foam fills voids and lifts the slab back to its original level. This controlled process allows precise height adjustment — no over-correction or damage.
Step 4 — Holes are patched: Access holes are sealed with colour-matched cement compound, making them virtually invisible. The repair blends seamlessly with the existing surface.
What Are the Key Benefits of Concrete Lifting Over Replacement?
Far more affordable: Concrete lifting typically costs roughly half the price of demolition and replacement. You avoid disposal fees, new material costs, and extensive labour — whilst achieving results that match or exceed replacement quality.
Incredibly fast: Most projects complete within hours rather than days or weeks. Polyurethane cures rapidly, allowing immediate use of the repaired surface — no waiting for new concrete to cure.
Minimal disruption: No loud demolition, heavy machinery, or landscape destruction. Garden beds, adjacent structures, and property features remain completely undisturbed throughout the repair.
Long-term durability: High-density polyurethane foam is waterproof, non-erosive, and extremely strong. Unlike traditional mudjacking materials that can wash away over time, polyurethane provides permanent void filling that prevents future settling.
Environmentally responsible: Repairing and lifting existing concrete avoids the embodied carbon cost of demolition, disposal, and manufacturing new material — making it consistent with a low-waste, eco-friendly approach to concrete.
Which Concrete Surfaces Are Suitable for Lifting?
Concrete lifting works well across a wide range of residential and commercial applications:
- Sunken driveways — eliminates water pooling and vehicle scraping, restores smooth access
- Uneven patios and paths — removes trip hazards and drainage problems, restores safe outdoor spaces
- Cracked garage floors — lifts and stabilises, prevents further cracking, creates level parking and storage surfaces
- Warehouse and commercial floors — maintains operational efficiency and safety for heavy equipment and forklift operations
- Pool surrounds — particularly effective because polyurethane's waterproof properties prevent the ongoing water infiltration that causes repeated settling
For new domestic concrete installations — driveways, patios, shed bases — Procon 24/7 supplies correctly specified concrete to minimise future settling risk from the outset. Use our concrete calculator to work out volumes before ordering.
What Is the Difference Between Mudjacking and Polyjacking?
Traditional mudjacking is an older method using heavy cement slurry pumped beneath slabs. Whilst still occasionally used, it requires larger holes, uses heavier materials that can contribute to future settling, and lacks the waterproof properties essential for long-term success.
Modern polyjacking (polyurethane foam injection) consistently outperforms mudjacking: smaller injection holes, lighter weight that reduces future settling risk, waterproof characteristics that prevent washout, and faster cure times that minimise project disruption. For most residential and light commercial applications, polyjacking is now the clear professional choice.
Frequently Asked Questions About Concrete Lifting
How long does concrete lifting last?
Professional polyurethane concrete lifting typically lasts 20–30 years or more when properly executed. The waterproof, non-erosive properties of high-density foam prevent the washout and settling issues that affect older repair methods.
Can concrete lifting fix large cracks in a slab?
Concrete lifting addresses settling-related cracks by stabilising the slab and eliminating further movement. Structural cracks may require additional repair techniques. Professional assessment identifies the most appropriate combination of treatments for your specific situation.
How much does concrete lifting cost compared to replacement?
Concrete lifting typically costs 40–60% less than complete slab replacement. Exact savings depend on project size, access conditions, and local costs, but the technique consistently delivers substantial savings whilst achieving equivalent or superior results.
Is my concrete suitable for lifting?
Most concrete slabs are excellent candidates for lifting, provided they remain structurally sound. Age, thickness, and existing damage levels determine suitability. Professional evaluation quickly identifies whether lifting represents the optimal solution for your circumstances.
