Concrete relevelling — known as slab jacking in the industry — is the process of raising and re-levelling sunken concrete slabs that rest on the ground. That includes floors inside your home, garage, or workspace, as well as outdoor areas like pool surrounds, driveways, and walkways.

Here's what 15,000+ jobs have taught us: the concrete is almost never the problem. The ground underneath is. The soil has settled, compacted, or washed away — and the slab has simply followed it down. Fix the ground, and the slab goes back where it belongs.

Modern concrete relevelling works by injecting expanding resin through small holes in the slab — directly into the ground beneath. The resin fills voids, compacts weak soil, and gradually lifts the slab back towards level. All controlled in real time with laser monitoring.

A sunken slab rarely stays a standalone problem. Left unaddressed, it triggers a cascade of structural issues: wall cracks, ceiling collapse, jammed windows and doors, leaning walls, and sloping floors. Outdoors, sinking concrete leads to drainage failures and underground service damage — plus safety hazards from uneven paths and trip edges.

Concrete relevelling stops the cascade early. Once the soil beneath the slab is stabilised and the slab lifted, you'll notice floors levelling out, gaps closing at skirting boards, and doors working again.