A root barrier is a physical barrier used to prevent tree roots from damaging nearby structures such as buildings, pipes, retaining walls, pavers, curb and guttering, roads, driveways etc.
This is done by digging a trench and installing a specialized barrier material to block the roots’ growth. Most people are surprised to learn that tree roots can actually cause damage to their surroundings due to their typically slow growth, but appearances are certainly deceiving in this case.
Root barriers do not harm trees if they are installed properly and do not interfere with the tree’s root system. However, if the barrier is installed too close to the tree or is too deep, it can damage the tree’s root system and cause it to decline or die. While we always encourage people to learn about proper methods for caring for their trees, having a root barrier installed is something we recommend leaving to an experienced arborist.
The ideal depth of a root barrier depends on several factors, such as the size and species of the tree, the soil type, and how far away nearby structures are. As a general rule, the barrier should be installed at a depth of at least 60cm to be effective in preventing root growth. As you can see, many factors go into making this decision. You should always be careful when digging around your home as pipes and other buried infrastructure could be damaged.