There are a range of technologies available that enable qualified professionals to better understand the composition of wood in a tree and the associated rate of decay. These include fractometers, resistographs and sonic tomography. Sonic tomography is the most sophisticated and in our view the most reliable method. It is only likely to be required for high value trees where there is an associated legitimate concern for safety.

Sonic tomography is the use of sound waves to detect decay in trees. Using this technology, it is possible to create a two- or three-dimensional image of the internal structure of a tree. This visual reference of the internal structure can then be used by a qualified arborist as part of an advanced tree risk assessment. Working with qualified partners we are able to provide a full assessment of the risk associated with a given tree, using a combination of sonic tomography in combination with other factors that may relate to tree stability.