Root Zone Management Company
| Home | Services | About | Information | Testimonials | Faq's | Links | Contacts |

Our Services

Root Control Barrier Installation

We have developed systems and methods, as well as designed equipment that greatly reduces the potential for tree roots to cause long-term damage or hazards. With our help you can transform your urban development into an environmentally desirable project that is sympathetic to the health and preservation of trees.

Tree Management
2.0 m depth Root Barrier installed for JG King Homes New housing estate – Sale.

For existing trees whose roots are beginning to cause damage we can provide the solution while preserving the tree and mitigating the damage that the tree's roots are causing. We achieve this through Installation of Root Control Barrier Systems and /or root pruning treatments.

Tree Management
Root barrier brick fence protection from street tree prior to reinstatement of footpath.

They are frequently installed to protect from tree roots:-

  • Building Foundations
  • Pathways
  • Tennis courts and Bowling Greens
  • Underground services
  • Car parks and Roadways
  • Garden beds
  • Front fences from council street trees

They are also used as vertical cut walls and moisture barrier's to intercept sub surface ground water.

Tree Management
Capable of installing root control barrier to depths of 2.0 m

The trench width is narrow enough to minimize site disturbance and the volume of soil that is required to be excavated , though wide enough to effectively enable the physical sealing off of underground services intercepting the H.D.P.E root control barrier.

Before any works commence, our experienced and qualified arborist, assesses the size, health and condition of the trees taking, into account each tree species tolerance of root disturbance. Once the appropriate set back of the root barrier from the tree has been calculated, using our electronic underground service detection equipment in conjunction with service maps provided by the utility companies, we are able to accurately locate underground services to allow for excavation without disruption of these.

Tree Management
Storm water are severed and professionally joined through the barrier with Butyl bond to create an effective root seal.

Following root pruning and excavation, our root control barrier is carefully positioned into the trench. In most instances we utilize a residual, non-mobile herbicide applied to the base off the trench, and in areas of intercepting services as a secondary precaution.

A stabilized sand/cement 'Liquidfill' slurry is used to back fill the trench, providing a fully compacted back fill which will not subside. If the spoil is used to backfill the trench then we utilize Sodium Bentonite to 'bond' the base of the barrier to the base of the trench.

Customers are provided with notes on taking care of their tree post root barrier installation, and guidelines to ensure the long term effectiveness of the barrier.

We warrant our High Density Polyethylene root control barrier membrane for 50 years against root intrusion.

Root Pruning and Air Knife Treatments

Air knife root investigations is a cost effective and relatively non destructive method employing a special lance and custom engineered nozzle emitting high volume and high pressure air enabling soil to be blown and dislodged from roots without severing or damaging woody roots. This tool is indispensable for mapping or 'chasing ' roots useful for both identifying tree roots and excavating areas where selective roots are suspected of causing damage. Further it enables for selective root pruning using sharp tools such as sharp chainsaws where precise root pruning is required close to or within the trees root plate, for example in the excavation for pier footings.

Tree Management
Airknife investigation of Oak trees in Gisborne for road widening

Our dedicated Root pruning saw, neatly prunes roots with minimal disturbance of roots at the interface between the root pruning trench and the trees trunk. This machine is ideal for pruning of long runs of roots especially if pruning larger roots is required closer to the trunks.

Tree Management
Root pruning of Significant English Elm prior to footing excavation

Tree Preservation & Management Programs

Root Zone evaluates and provides reports towards achieving tree preservation and evaluating the trees hazard potential. On building and development sites we provide reports for Local Government, Architects, Developers and Home Owners.Builders.

Tree Management
Tree Preservation of Eucalyptus sp, subject to waterlogging following construction of lake and golf course – Sth Gisborne

We offer solutions towards preventing conflicts and tree injury while achieving developmental aims, while satisfying local government requirements. We assess trees on particular sites making recommendations regarding their preservation and amenity value. For trees worthy of preservation we then outline what steps and treatments the tree/s requires to ensure their survival. Implementation of Tree Preservation Programs Include:-

  • Calculations of Tree Protection Zones
  • Mulching
  • Root pruning and root barrier installations
  • Soil amelioration such as soil de compaction and modification of the soil sphere.
  • Tree Protection Fencing and Signage
  • Pruning and Tree Health Care
  • Fertilisers and growth hormones applied through soil injection
  • Cobra Tree Cabling
  • Annual inspections and reporting
  • Monetary valuations of specific trees

Tree Management
Magnificant significant 400 plus year old River Red Gum – Bundoora in our care for last 12 Years

Tree Reports & Consultancy

Root Zone writes reports assessing trees and the damage they cause to buildings and other assets. We have experience acting in the capacity of expert witness in disputes between neighbours over their trees. We encourage and have been directly involved in mediation towards achieving satisfactory outcomes before they involve expensive litigation.

Tree Assessments: we have extensive experience in writing reports and in assessing the health and safety of your trees; Also in making recommendations to achieve a hazard free trees cape, providing sound advise to ensure their longevity. Whether you require simply an on site assessment or a full report with full practical implementation of recommended treatments, we will provide you with the best outcomes.

Palm & Mature Tree Transplants

If the tree is anything less than ideal it is likely it is not worth transplanting. Before any transplant is undertaken appraisal of the specimen for suitability and for its likely survival are first assessed. We have extensive experience in transplanting your tree or palm. All root balls are professionally pruned and 'contained' for transport.

Anti –tranpirant applications to the foliage and root growth hormones are sometimes employed to ensure transplanting success. Whether you are moving your tree palm from one end of the block to the other, or across the state, we are able to manage your transplant from start to finish including post transplanting advise and care.

Tree Management
Canary Island Palm from Williamstown to Werribee

Tree Management
Large mature Magnolia, being prepared for lifting

Elm Leaf Beetle Treatment

Tree Management

We provide:-

  • Soil Injections
  • Trunk Injections
  • Bark Banding
  • Tree Health and Hazard assessments
  • Consultancy and Monitoring

Elm Leaf Beetle

Elm Leaf Beetle and the Larvae can cause severe defoliation of susceptible Elm species. The repeated loss of foliage may cause the decline of the tree through greatly reduced photosynthesis interfering with the trees normal physiological function. Defoliated trees are unsightly and more susceptible to pest and disease, and other environmental stress's.

What are the Symptoms?

Small holes in the leaves called 'shot holes' are caused by the adult beetle.

The Beetle is 6 mm long, with distinctive black and yellow stripes. Skeletonising of the leaves is another type of damage caused by the larvae. Skeletonised leaves turn brown and drop prematurely. The Larvae strip the foliage from the leaves leaving only the skeleton of the leaf.

Tree Management

What is the Beetles Lifecycle?

In the spring the adults fly to the Elms and eat small holes in newly developing leaves. Eggs are laid in a cluster on the underside of the leaves. The eggs hatch and the larvae feed for several weeks 'skeletonising' the leaves. The larvae then crawl to a sheltered place in the crevices of the trunk, or in the soil to pupate. Within a couple of weeks new adults emerge to feed, lay eggs and repeat the cycle.

What are the Treatments for controlling this Pest?

A number of treatments, chemical, non chemical and biological controls are available. The most effective treatment is the soil injection of a registered chemical going by the trade name Confidor. In some circumstances trunk injections are more suitable. The Confidor. Treatment is best undertaken in late winter through spring.

Please contact Root Zone Management Co for a no obligation quote and to discuss the most effective management strategies too keep your Elms beautiful and healthy.