Biobarrier Root Control Fabric is insurance against root damage on hardscapes and landscapes. For only pennies a month per square foot, a one-time installation of Biobarrier is guaranteed for 15 years to prevent roots from causing damage. The root-control fabric reduces maintenance and liability costs. Biobarrier is being used as the root barrier in a test of structural and noncompacted soils surrounding tree plantings in urban plazas. The test, conducted by Bartlett Tree Research Laboratories compares a variety of soils and their efficacy for tree growth in a restricted area, the condition experienced by many urban trees. Biobarrier’s role in this test is to confine the tree roots to the cell where the tree is growing.