Roma Street Parkland is one of Brisbane’s most iconic public spaces — 16 hectares of landscaped gardens, 100,000 shrubs, 1,200 mature trees, 1,800 plant species, and 10 kilometres of concrete walkway. Millions of visitors walk, cycle, and sit in this park every year.

Over the past two decades, sections of heavy prefabricated concrete stairs, industrial walkway slabs, bikeways, and footpaths across the parkland have sunk unevenly at different times — creating trip hazards for pedestrians, drainage failures on the bikeway, and public safety risks that Brisbane City Council needed resolved.

Brisbane City Council has used Buildfix to relevel affected sections across the park.

Public parkland demands a standard most contractors aren’t set up to deliver.

The conventional fix — rip up the slabs, pour new concrete, close the section for weeks — was never an option for a park that doesn’t shut down. Every repair had to be completed while the café traded, foot traffic flowed, and cyclists rode past. The work had to happen around the public, not instead of them.

But the real challenge was precision. In a residential setting, a few millimetres either way might go unnoticed. In a public space used by millions of people — including elderly visitors, children, and cyclists — there’s no margin. A lip of even a few millimetres on a concrete path is a trip hazard. A slight crossfall error on a bikeway means water pools instead of draining, creating a slippery surface with a genuine risk of traction loss.

The causes varied across jobs. In one area, a flawed drainage system had allowed water to pool beneath stairs and slabs, eroding the soil and creating large voids underground. In another, ground movement had caused the bikeway and footpath to settle at different levels, throwing the crossfall out and sending runoff in the wrong direction.

Each time, the brief was the same: stabilise the ground, lift the concrete back to level with millimetre precision, and leave a surface with zero trip hazard for the public.

Every repair across Roma Street Parkland used GeoPoly™ resin injection — Buildfix’s own proprietary resin, manufactured in-house.

Small injection holes were drilled through the concrete at strategic points. GeoPoly™ was injected directly beneath the affected slabs, filling voids, compacting the eroded soil, and gently lifting the concrete back into position. Each lift was monitored in real time to achieve millimetre-accurate correction.

For the sunken stairs and walkways, the resin solidified the ground beneath heavy prefabricated concrete slabs and achieved lifts of up to 15mm — bringing industrial-weight structures back to level without removing or replacing them.

For the bikeway and footpath, GeoPoly™ SJ120 corrected the levels and — critically — the crossfall. Proper drainage was the priority. Getting the surface level wasn’t enough; the gradient had to be precise enough that water flowed off the path instead of collecting on it.

Most injection contractors lift to ‘close enough.’ In a public park used by millions, close enough is a safety risk. Civil operators work to broader tolerances — acceptable for road base or industrial slabs, but not for public footpaths where a minor inconsistency becomes a trip hazard or a drainage failure.

Buildfix brings residential-level precision to every job. The same millimetre accuracy applied in a family home is applied across Roma Street Parkland.

Across multiple visits over the years, every sunken section of Roma Street Parkland that Buildfix has repaired has stayed level. The stairs are stable. The walkways are flat. The bikeway drains correctly. No further signs of subsidence in any repaired area.

The café stayed open during every repair. The public kept walking. Only small access holes remain in the concrete — unnoticeable to visitors.

Each repair saved tens of thousands compared to ripping up and re-laying the slabs. Every section Buildfix has relevelled has stayed level.

When Brisbane City Council needs sunken concrete relevelled in one of the city’s most-visited parks, they call Buildfix. The same technology, the same precision, and the same team are available for any home in Brisbane — or anywhere in Australia.

If you have sinking or sloping floors in or around your home, Buildfix can apply the exact same relevelling precision that Brisbane City Council receives. Book a free assessment and a structural engineer will pinpoint exactly where the movement is — and what it’ll take to fix it.