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Tree Decay Assessment

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When a tree is identified as being at risk of failure, a full condition and safety assessment is necessary in order to appraise the potential risk. At Bagshaw Ecology we specialise in carrying detailed decay assessments of trees using the IML Resistograph.

The Resistograph is a micro-drill which aids in the early detection of decay in wood, based on a drilling resistance method. A drilling needle with a diameter of 1.5mm penetrates into the tree at a constant speed, and the drilling resistance is measured. These measurements are then translated electronically into a graph. This enables our experienced arboricultural consultants to detect defects such as wood decay, hollow areas and cracks in trees. Virtually no damage is caused to the tree in the process.

There are three practical advantages to tree decay assessment when using the Resistograph:

  1. The Resistograph can identify dysfunctional wood in trees which exhibit little or no outward signs of decay. This can be particularly useful when assessing trees infected with pathogenic fungi, the fruiting bodies of which are only evident at certain times of year.
  2. The Resistograph can help retain trees when removal is not required. For trees which initially appear unsafe, a more comprehensive assessment of the tree’s safety value can be attained. This can not only save trees of high value, but can also save our clients the costs of unnecessary tree removal.
  3. When unsafe levels of decay in a tree are identified, the Resistograph provides objective evidence of the need for removal. This is often a necessity for trees of high cultural or conservation value, or trees protected by Tree Preservation Orders (TPO’s) or within Conservation Areas.

To find out more about our Tree Decay Assessment services, please Contact Us.