Root Barrier have been involved in the development of root barriers and their construction and applications since 1992. Technology allowed us to move from a concrete barrier which cracked and failed, to special plastics with the capacity to handle the stresses and loads created by matric suction, soil and moisture movement. For more information, please contact us now. Root Barrier, 61 Somerset Street, Windsor, Queensland 4030, Phone: 1300 136644, Fax: 07 3861 0701, www.rootbarrier.com.au