Project Overview
StoneSet partnered with Woollahra Municipal Council to upgrade the tree surround at the well-frequented Kiosk within Rushcutters Bay Park — a high-traffic public space where safety, durability and environmental sensitivity were equally critical.
The Challenge
The existing rubber soft-fall surface had deteriorated significantly over time. As the surrounding ground naturally shifted and the tree roots continued to grow, the synthetic surface began to shrink, settle and deform. These inconsistencies created undulations and surface depressions, forming a clear trip hazard in an area regularly used by pedestrians.
Beyond safety concerns, the existing material lacked sufficient permeability to properly support the tree’s long-term health. Dense, synthetic systems can struggle in dynamic environments where root expansion and soil movement are ongoing realities.
Council required a solution that would:
- Improve public safety
- Increase permeability to support tree health
- Accommodate natural ground movement
- Maintain a high slip resistance rating
- Provide a long-term, low-maintenance outcome
Our Approach
StoneSet’s resin-bound paving system was selected for its unique ability to balance flexibility with structural integrity.
Our Premium UV-stable resin technology allows the surface to flex with subtle ground movement and root expansion while holding its form under load. Unlike rigid systems that crack or brittle synthetic materials that deform, StoneSet maintains a consistent, seamless finish — even in areas subject to impact or repeated foot traffic.
Importantly, the surface retains its profile without forming surface depressions when subjected to repeated loading, such as dropped objects or constant pedestrian movement.
Protecting the Tree & Maximising Drainage
Preserving the existing root system was a priority. Rather than undertaking deep excavation that could disturb the tree’s structural roots, the team implemented a minimally invasive preparation method.
A 7–10mm clean, free-draining blue metal layer was carefully installed over the settled soil and roots. This approach:
- Maintained high permeability
- Allowed oxygen and water to reach the root zone
- Avoided unnecessary disturbance of the tree structure
- Created a stable yet breathable foundation
To stabilise this relatively thin base layer without compromising its porosity, a light coat of Amber PourOn Gravel Binder was applied. This provided additional structural cohesion to the blue metal, creating a more unified and load-sharing platform for the 30mm StoneSet layer installed above.
The result was a permeable build-up that preserved natural drainage pathways while ensuring the finished surface remained firm, stable and safe underfoot.
Sustainability & Environmental Considerations
Replacing the rubber surface also eliminated the ongoing risk of microplastic shedding — a common long-term issue with synthetic soft-fall products exposed to UV and wear.
StoneSet uses natural aggregates bound with a PFAS-free polyurethane resin system. Once cured, the resin becomes inert, meaning it does not leach harmful substances into surrounding soil or stormwater systems. This makes it a responsible choice for environmentally sensitive public spaces, particularly around established trees and parkland.
The permeable structure allows water to pass freely through the surface, reducing runoff and supporting natural ground hydration — critical for tree longevity in urban environments.
The Outcome
The finished installation delivers:
- A seamless, trip-resistant surface
- High permeability to support tree health
- Flexibility to accommodate natural ground movement
- A high slip-resistance rating suitable for public use
- A durable, low-maintenance solution with an extensive year design life
With over 25 years of experience in resin-bound technology, StoneSet worked closely with Council to tailor a specification that performs in a dynamic, living environment — enhancing both safety and sustainability in one of Sydney’s most loved waterfront parks.
