ArborFlow
Structural soil cell system for creating large underground soil volumes beneath pavements
RootSpace Structural Soil System
RootSpace is GreenBlue Urban’s flagship structural soil cell system, designed to create large volumes of uncompacted soil beneath paved environments while supporting the structural loads of surrounding pavements and infrastructure.
With more than 95% void space, the system maximises available rootable soil volume while maintaining the strength required for streets, public realm and development environments.
RootSpace enables urban trees to establish extensive root systems and achieve longterm canopy growth without compromising pavement performance.
The Challenge of Urban Tree Growth
Urban trees often struggle to establish in paved environments where soil becomes compacted and restricted beneath hard surfaces. Without sufficient volumes of uncompacted soil, root systems cannot develop properly and trees fail to reach maturity.
RootSpace was developed to address this challenge by creating
structural soil volumes beneath pavements while maintaining the
load-bearing capacity required for surrounding infrastructure.
More than 95% void space for maximum rootable soil volume
Continuous structural framework beneath pavements
Open lattice structure allowing roots access to the full soil volume
High lateral structural strength for demanding urban environments
Manufactured in the UK from 100% recycled material
Flexible layouts around utilities and services
Key Characteristics
RootSpace is designed to adapt to the realities of urban sites. Flexible depth configurations and a modular layout allow systems to work around utilities, variable build-ups and changing ground conditions, while still delivering reliable structural performance and consistent soil volumes.
Benefits of RootSpace
RootSpace is designed to deliver practical benefits on site as well as long-term performance. From efficient installation through to improved growing conditions, it helps projects meet technical requirements while creating better outcomes for trees and the built environment.
Maximising Rootable Soil Volume →
Structural Performance →
Installation and Soil Placement →
Flexible Around Utilities →
Configurable Soil Volumes →
Designed for Lasting Value →
Part of Integrated Tree Pit System
Introducing ArborSystem
RootSpace is frequently used as the structural soil framework within larger tree pit and SuDS systems.
RootSpace is frequently used as the structural soil framework within larger tree pit and SuDS systems.
When combined with ArborSystem, it provides structured tree pit infrastructure at the pavement interface while maintaining continuous soil volumes beneath the surface.
Where sustainable drainage is required, RootSpace can also form part of ArborFlow tree pit systems, allowing structural soil volumes to contribute to stormwater management.
Technical Guidance for Designers and Engineers
CPDs, design guidance and technical documentation used during specification and project delivery.