Root Barrier

A root barrier is a mechanical or chemical obstruction installed in or around a sewer pipe to prevent tree and shrub roots from growing into the piping system. Tree roots are attracted to the moisture and nutrients inside sewer pipes and can penetrate even small cracks or loose joints, eventually causing blockages and pipe damage.

Root intrusion is one of the most common causes of recurring sewer blockages, particularly in older homes surrounded by mature trees. Species such as willows, poplars, and birches are especially aggressive root growers. Once roots enter a pipe, they rapidly proliferate and trap grease, debris, and other materials, creating stubborn blockages.

A mechanical root barrier is a physical sheet or panel installed in the soil between the tree and the pipe, redirecting root growth downward and away from the infrastructure. Chemical root barriers use slow-release herbicide treatments applied inside the pipe to discourage root growth near joints and entry points.

Root barriers can be installed during sewer relining as part of the rehabilitation process, or as a standalone preventive measure. If you experience repeated sewer blockages and have large trees near your sewer lines, a professional camera inspection followed by root barrier installation may be the most cost-effective long-term solution.