Tree Root Barriers: Types, Cost, and Installation Guide

Tree root barriers are physical or chemical barriers installed underground to redirect tree roots away from structures, pipes, and paving. They offer a way to keep a valued tree while protecting your property from root damage.

Types of Root Barriers

The most common root barriers in Australia are made from high-density polyethylene (HDPE) panels, typically 600mm to 900mm deep. These are installed vertically in a trench between the tree and the structure being protected. Other options include copper-impregnated fabric barriers and concrete barriers. Your arborist can advise which type suits your situation and may recommend root removal for roots that have already caused damage.

When Root Barriers Are Appropriate

Root barriers work best as a preventative measure or when root damage is in its early stages. They are ideal when you want to keep a tree but prevent its roots from reaching infrastructure. If roots have already caused significant damage, root removal may be necessary before installing a barrier. For pipe-related root problems, see our guide on tree roots in pipes.

Cost of Root Barrier Installation

Root barrier installation typically costs between $80 and $150 per linear metre, including materials, excavation, and backfilling. A typical residential installation of 5-10 metres costs $500 to $1,500. This is often far more cost-effective than tree removal, which carries its own separate costs.

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