Root Space

New, Urban Root Space System

Century Products – Manufacturer of Century Root Barriers, Along with Green Blue Urban are proud to introduce a Preferred alternate to Silva Cell. This new product exceeds the Silva Cell specifications and is more cost effective.

Century’s Root Space products are engineered to meet the most stringent industry performance standards and offer application flexibility.

The Root Space System promotes tree growth and limits structural damage to surrounding paved surfaces. Utilizing the Root Space, this system acts as a soil containment structure to support surface loads while creating a void space for uncompacted soil – allowing the tree to grow larger and live longer. As an added benefit, the Root Space System assists natural stormwater management through evapotranspiration.

Root Space Brochure

Click the image to download.

Root Growth Without Module

Typical plantings limit the space tree roots need to grow, causing compacted soil and poor tree health. In addition, the constrained roots often cause structural damage to surrounding curbs and sidewalks.


Root Growth With Module

With the StormTank Urban Root System, tree roots have a healthy environment and space to grow. The Modules create rich, loose soil, to foster root growth without damaging surrounding structures.



  • University of South Carolina, Athletic Village
  • University of South Carolina – Track & Field
  • Location: Columbia, South Carolina
  • Project Consultant: Grimball-Cotterill & Associates
  • System: Single Stack ST-30 Urban Root System
  • Total Storage Volume: 7,972.11 ft3
  • Installation Date: Summer 2016

As a school with a well-known reputation for football and basketball, the University of South Carolina has been eager to promote its wider athletic program and continue drawing top athletes to its sports teams. In an effort to support track and field, and with the hope of producing more Olympians like Natasha Hastings (4th place finisher in the Rio 400M and USC alumna), the University of South Carolina undertook an elaborate project to upgrade their Athletic Village.

This project included a new 400-meter outdoor track, a separate area for throwing events, bleachers, and restroom facilities. In addition to the facility upgrades, an extension to the promenade walkway, including lighting and shade trades, was incorporated into the project design.

The initial design incorporated thirteen shade trees with structural soil support cells. These cells provide structural load support for the surface above, – in this case, a pedestrian plaza and walkway – while allowing the contained soil to remain uncompacted and promote tree root growth.

The university was not satisified with the cost of the specified product and reached out to the general contractor to discuss an innovative alternative. They learned about Brentwood’s Urban Root System – a system that is typically used for stormwater storage applications and incorporates the StormTank Module.

In this case, however, the Urban Root System was utilized as a structural unit, allowing the soil with the units to remain uncompacted so that the trees can grow larger and live longer. The StormTank Modules were installed without modification, and a filling platen was used to place soil within the units. These platens have large openings cut into the top, enabling the soil to enter the units quicker.

Brentwood worked with the general contractor to engineer the system installation for a total cost savings of roughly $45,000 over the specified product. In addition to saving the contractor and the university money, Brentwood provided installation support to ensure the design was properly executed. This component of the overall project may have the least visual impact on the pedestrians above, but it will provide the students, athletes, and attendees with a beautiful and natural promenade for years to come.