Specialist Tree Decay Detection — Nazarene Theological College

Client: Nazarene Theological College — subcontracted via Lally Tree Management


Project Overview: Lally Tree Management commissioned Urban Tree Management to carry out specialist decay detection investigations at Nazarene Theological College on two mature European beech trees showing signs of significant internal dysfunction — T964 (beech 10a) requiring Resistograph investigation and T1931 (beech 10d) requiring sonic tomography.


Our Role: Urban Tree Management carried out IML Resistograph resistance drilling on T964 — measuring residual wall thickness and confirming the presence and depth of internal decay across critical load-bearing zones. Arbotom sonic tomography was carried out on T1931 — producing a two-dimensional tomographic image of the internal condition of the stem.


Findings & Recommendations:

  • T964 — Resistograph confirmed significant internal decay and dysfunction — removal recommended
  • T1931 — Sonic tomography revealed early-stage decay — sufficient structural competence for monitored retention
  • Structured two-year monitoring programme specified for T1931
  • Return investigation using both instruments recommended at year two


Outcome: Lally Tree Management received a professionally produced specialist decay detection report covering both trees — with T964 confirmed for removal and T1931 placed on a structured monitoring programme, giving the college objective, evidence-based management recommendations for both specimens.

Specialist Decay Detection Subcontract — North West & Nationwide


Urban Tree Management provides Resistograph and Arbotom sonic tomography decay detection on a subcontract basis for arboricultural consultancies across the North West and nationally — delivering the objective, technically robust diagnostic evidence that consultants need when visual inspection alone is not sufficient.


Get in contact with our highly experienced and personable team of arboriculturists today, to discuss your requirements and to obtain your zero obligation quotation.