Permeable Root Barrier — Typar BioBarrier

BioBarrier suits nearly any situation where roots or weeds need to be kept out of a protected area: along sidewalks, driveways, and curbs; around building foundations, pipes, and utilities; near swimming pools, tennis courts, and golf courses; in gardens, cemeteries, levees, and dams; and in green-roof and planter applications. Install it when planting a new tree, or in a trench around existing trees and structures.

1. Excavate the trench. Excavate a trench along the perimeter of the area to be protected, positioned between the encroaching root mass and the structure or landscape. Trench depth should equal the fabric height so the barrier extends from finished grade to the base of the anticipated root zone.

2. Sever existing roots. Prune and remove any existing roots encountered within the trench, cutting cleanly back to the protected side so no established root bridges the barrier plane.

3. Position the geotextile. Deploy the BioBarrier vertically in the trench, oriented between the protected area and all root sources, with edges abutted or overlapped per the installation manual to maintain a continuous trifluralin zone. Wear gloves to avoid trifluralin contact, and keep the material sealed in its UV-protective bag until placement — premature sun exposure accelerates herbicide volatilization and shortens the effective 15-year service life.

4. Backfill and compact. Backfill the trench in lifts, tamp to consolidate the soil against the fabric, and rake the surface to finished grade. Once backfilled, the nodules establish the root-inhibition zone and the system requires no further maintenance.