Hume Masterpanel makes building panels from a large warehouse in Bundamba, in Ipswich’s industrial belt. Trucks and forklifts cross the concrete hardstand all day. On 26/09/2025 the enquiry came through the website, flagged commercial, three words long: “Driveway is sinking.”

The concrete relevelling assessment at the Bundamba site found sections of the yard slab had sunk at the joints, leaving steps between one panel and the next. The scope also took in a 2.8m-deep concrete drainage pit that needed its base stabilised.

A hardstand drops at the joints for a reason, and it’s rarely the concrete. Here the likely causes were water escaping beneath the slab from a leak or a pipe, and fill that was never properly compacted when the yard was built.

Part of the yard had a newer slab poured to match one side, so a perfect match across every joint wasn’t possible. The target was a yard trucks could cross without a step, not a laser-flat one.

There was a gap between the drain and the slabs that resin could escape into. GeoPoly™ expands where it’s put — if there’s an open path beside the slab, that’s where it goes, and the slab doesn’t lift.

And the pit was 2.8m deep. Nobody was climbing down to inject it, so every injection went in from the top with the lift watched from a ladder.

Replacing the sunken panels works, but it means breaking out the concrete, re-pouring and curing, with that part of the yard fenced off for weeks. And new concrete on the same fill sinks the same way.

Our engineer assessed the site and issued the quote and repair detail on 09/10/2025: fixed price, one day on site, unlimited GeoPoly™ SJ120 slab-jacking resin, 20-year warranty. No per-kilo charges — the quote is the price.

Before anyone drilled, underground services were located. All 6 asset owners responded: no cables in the work area, only reinforcing steel at the expansion joints.

On 21/11/2025 the crew carried out DeepLift injections across the marked area. Holes were drilled to about 1,000mm, and 1,500mm and 2,000mm aluminium lances delivered the resin into the loose fill beneath, where it expanded, compacted the ground and lifted the slabs from below. Hilti PR30 laser receivers on the panels tracked the lift live, millimetre by millimetre.

Lances out, holes patched, same day.

On site at 8:00am, finished at 3:00pm. 180kg of GeoPoly™ went in. The lowest point came up 29mm and the rest of the area 14–19mm — the steps between panels closed, the pit stabilised.

The client signed off as very satisfied. The invoice matched the quote to the dollar, with no variations. Every GeoPoly™ repair is backed by a written 20-year product and workmanship warranty.

Got a hardstand stepping at the joints, or a yard that's dropped around a drain? A free site assessment measures the levels and explains what concrete relevelling can do for sunken concrete without fencing off the yard.

At the first booking the engineer noted the client “might have many others to be done in the future”. On 09/06/2026 the client called back for a second assessment.

Our engineer quoted on 24/06/2026. The client accepted within 6 days, and the engineer’s note to the office was to book the same team that did the first job.

The second repair ran 03/08/2026–04/08/2026: slabs lifted 20–26mm in every area. The completion-call feedback, in full: “All good.”