Roll Size 900mm x 15 metres

Normally placed between the tree and whatever you wish to protect. Try not to surround the tree. Our preferred method is placing the root barrier along beside the path, building, pipe etc so that the tree roots cannot gain access to the structure. If you wish to stabilise moisture in reactive clays under the structure a deep barrier may be required.
Depth - determined by aeration of the soil. In “normal” undisturbed soil very little growth occurs deeper than 1 metre.
Seal - Sodium Bentonite or other root growth inhibitor is used to seal the bottom of the trench and bind the bottom of the root barrier to the undisturbed soil. In summary take the barrier down to soil that nothing can grow in and bind the root barrier to it.
Length - sufficient to stop the roots going around the edge of the barrier, normally 1 or 2 metres outside the drip line of the tree. Install ROOT BARRIER in one piece.
Tree Care - Working in from the drip line (edge of the leaves), the closer you get to the trunk the higher the risk of damaging or destabilising the tree. 50% of the distance from the drip line to the trunk (20% of the tree’s total root platform) is regarded as the closest you can cut without major risk to the plant’s health. If it is necessary to cut closer than halfway towards the trunk, it would be advisable to engage the services of an arborist to assess the tree prior to the work being carried out, and to help nurse the tree through the period of installation.

BARRIER PLACEMENT

1. Dig a 100mm wide trench to the required depth, insert ROOT BARRIER. Ensure 50mm of root barrier is left above finished ground height (this is to allow for settlement and may be trimmed off later).
   
   
2. Trim exposed tree roots to leave a clean cut, treat with fungicide if required.
   
   
3. Backfill the base of the trench placing a layer of growth inhibitor, then back fill using spoil from the trench.
   
   
4. ROOT BARRIER should be trimmed to just below lawn mower height but above ground (Top of ROOT BARRIER must be exposed on completion).

The information contained in the brochure reflects our best knowledge at the time of issue and is subject to change without notice. No warranty is expressed or implied other than that required by law. We do not undertake any liability for the use of our products and information.

<Back

© 2004 Coulton Pty Ltd