Trees are dynamic structures, constantly growing and changing to adapt to environmental conditions. Therefore it is critical that tree owners and managers take appropriate action to maintain their safety.
Managers and land owners have a ‘Duty of Care’ to take reasonable care under the Occupiers Liability Acts 1957 and 1984 to ensure that trees situated on their land remain in a safe condition as far as it reasonably practicable. To discharge that duty effectively inspections and surveys should be carried out at appropriate intervals to ensure risk is reduced and harm is not caused where foreseeable.
The frequency and detail of a tree survey can vary from a less detailed “walk through survey” to a highly detailed “individual tree survey”. Surveys are individually tailored to meet specific requirements of each client.
Information collected from a tree inspection/survey is correlated and recorded using the latest technology in computerised tree management software, GPS (Global Positioning Systems) and GIS (Geographic Information Systems). This ensures that trees are accurately plotted and all information is systematically ascertained for all trees.
The tree data collected includes the following:
- Individual identification number
- Species
- Height
- Canopy spread
- Maturity
- Physiological condition
- Structural condition
- Comments and additional notes
- Preliminary management recommendations
- Works priority
- Frequency of future inspections
A tree inventory can then be created over a number of years, which will ensure that any alterations to the physiological or structural conditions of the trees are recorded and the requirements for remedial action are identified and resolved.
As an output to our tree inspections and surveys all clients are provided with a detailed tree schedule, site plan and report, which is often provided electronically to reduce cost and the use of paper. The tree schedule details all trees and provides information to ensure remedial management is systematically completed within any time and budgetary constraints. Following completion of works a further consultation and signing off inspection is always recommended.
All of our consultants and associates who undertake visual tree assessments (VTA) and inspections hold the Lantra Awards Certificate for Professional Tree Inspections. This is an industry recognised certification to ensure inspectors are arboriculturally qualified and competent.
Aerial Tree Inspections
In general all of our tree inspection work is undertaken from ground level, however, where required detailed aerial inspections are undertaken either via climbing inspections, or with the use of ladder or MEWPS (Mobile Elevated Work Platforms).
This type of inspection would be commissioned where there are large wounds, cavities or splits associated with trees or following the identification of decay or decay causing organisms. This work is generally recommended following the initial ground level survey.
Internal Decay Detection
Additionally to the initial external assessment of a tree, if there is internal decay suspected or decay causing organisms identified, it may be necessary to undertake a further internal examination. This will assess the extent of decay and provide additional information to evaluate and aid the decision making process to ensure the most appropriate remedial action is undertaken.
There are various methods, tools and technologies for undertaking more detailed internal decay detection and depending on the location of the tree, condition and cause of decay will depend on which tool is utilised.
Following quantification and mapping of internal decay an appraisal of the tree using modern research and current industry best-practice will ensure the correct prognosis and recommendations are made.
Tree Work Contracting
Wharton Arboriculture Ltd does not undertake in-house tree surgery. We believe this allows an impartial and unbiased assessment, with only the best interests of the client and subject trees at the heart of all recommendations.
Following a tree survey we can, at the client’s request, facilitate quotations, contracts, or specifications from a variety of established contractors to undertake remedial work as necessary.
