Tree roots predominantly grow in the upper surface of the soil and spread out extensively and laterally from the trunk. A good root system is essential to sustain healthy tree growth, but the roots can be deflected to grow downwards and avoid damage to adjacent structures or services.
Rootline root control barrier can be installed around the tree or adjacent to the structure or wrapped around pipes etc.
Rootline is available in four styles and each consists of robust flexible polymer (PP or HDPE) sheets that resist penetration by roots.
Impermeable Rootline is preferred for most situations, but there is one style of Rootline that is moisture permeable.
The plain Rootline is the most economic, but the dimpled and pocketed version of Rootline is the most effective in vertical applications, guiding the roots into a downward direction.
Rootline is available in the following formats:
- Rootline GHD85, 120 and 200 are water impermeable HDPE with a plain surface.
- Rootline GHD160S20 is water impermeable LLDPE with a 20mm pocketed surface.
The diagram above shows how ABG Rootline GHD160S29 root barrier deflects tree roots downwards via the “pockets”.
How Rootline Works
Normal, healthy root structure growth occurs laterally through the upper surfaces of the soil. This is fine, unless the root growth is beneath or adjacent to structures where it may cause significant damage.
Using Rootline prevents the lateral spread of roots, deflecting them harmlessly down into the ground allowing healthy growth, but mitigating damage to the structure.
Our Technical Department can offer advice on appropriate styles of Rootline for differing situations and on typical installation details.