A section of the tennis court at this Runaway Bay residential complex had dropped approximately 100mm — a significant step right through the playing surface and along the perimeter. The court was effectively out of action. Unsafe footing, unpredictable ball bounce, and a genuine trip hazard meant it couldn’t be used until the problem was fixed.

The slab had lost ground support along one edge, allowing it to sink substantially. A 100mm drop across a sports surface changes everything — footing, ball behaviour, and the risk of trips and ankle injuries. Movement along the edge beam and fence line pointed to ongoing settlement beneath the slab.

The traditional fix — ripping up the court and re-laying the slab — would have been costly and time-consuming. The solution needed to lift and stabilise the court without damaging the existing surface.

Targeted injection points were drilled through the court surface. GeoPoly™ SJ120 resin was injected beneath the slab, filling voids, compacting the underlying ground, and gradually lifting the sunken section back toward level. The lift was carefully monitored throughout to achieve accurate correction without compromising the court surface.

The 100mm level difference was eliminated. The playing surface was consistent again — safe footing, predictable bounce, no trip hazard. Dealing with sunken concrete on your property? A free assessment explains what concrete relevelling can do.