Rylock’s premises sit in Dingley Village, in Melbourne’s south-east: a large warehouse with roller doors and a concrete yard that forklifts and trucks cross all day, with racks of glass panels stored on the slab. On 02/03/2023 the enquiry came through the website, in the client’s words: “This is a commercial driveway that is subsiding. I think it has gone down by 35 to 40mm.”

The concrete relevelling assessment at the Dingley Village site confirmed it. The slab had dropped at the joints in the yard and on the warehouse floor, leaving a measurable step right where the forklifts turn.

The ground had given way for two reasons at once. Insufficient drainage was washing the foundation soil out from under the slab, and the reactive clay beneath it had shrunk through the dry spells — leaving voids the concrete had nothing to sit on.

A step at a slab joint is a problem for every wheel that crosses it. Forklifts carrying glass don’t want a 35mm drop, and neither do the trucks backing up to the roller doors. Whatever the fix, the yard had to be open again fast.

Replacing the sunken panels works, but it means breaking out the concrete, re-pouring and curing — days with the yard fenced off and the glass racks moved. And new concrete on the same washed-out clay sinks the same way.

The repair also had to reach both areas, inside and out, in one visit, and it had to miss the underground pipes. Those were located before anyone arrived, and the crew checked the plumbing diagram again on the day.

Our engineer assessed the site and issued the quote and structural repair detail on 02/04/2023: GeoPoly™ GER60 resin injected directly below the concrete to lift the slab back to level, at a fixed price, in one day or less. Rylock booked it through their own work order.

On 02/06/2023 the Victorian crew set up the Hilti PR30 laser and receivers on the sunken panels, drilled through the slab and set aluminium injection pipes into the ground beneath. GeoPoly™ went in, expanded, filled the voids, compacted the washed-out clay and lifted the concrete from below — the receivers reading each millimetre as it came up.

Pipes out, holes patched. Four hours, start to finish.

On site at 8:00am, finished at 12:00pm. 125kg of GeoPoly™ lifted both areas 20–35mm, and every area came back to level. The client had guessed 35 to 40mm. The laser receiver read 35.

The technician’s site note, in full: “Lovely result here. All areas brought back to level. Staff that worked here were watching and enjoyed the results.” He asked for 5 hours before heavy loads crossed the repaired slab, so the yard was back in full use the same day.

Paid in full at the quoted price. The job carried a 10-year warranty, the Buildfix standard at the time, with the injected material guaranteed against shrinkage or breakdown for up to 50 years; every GeoPoly™ treatment today is backed by a written 20-year product and workmanship warranty.

Got a yard or warehouse floor stepping at the joints under forklift traffic? A free site assessment measures the drop and explains what concrete relevelling can do for sunken concrete in a morning, with the site open.