About the Practitioner
Building Pathology Diagnostics is a senior-led diagnostic consultancy operating exclusively on cases requiring advanced diagnostic capability — structural failure, chronic moisture pathology, latent defect identification, and multi-party liability analysis.
Garth Jarrett
01 — Seniority & Operational Background
Over 15 years of direct industry experience in complex building delivery, defect analysis, and forensic investigation. This is not a general survey practice. The firm operates exclusively on cases requiring advanced diagnostic capability — structural failure, chronic moisture pathology, latent defect identification, and multi-party liability analysis.
02 — Academic Foundation
The lead consultant holds a Master of Science (MSc) in Construction Project Management, and specialises in building pathology and defect diagnosis. This grounding provides the theoretical framework for hygrothermal analysis, materials science, and structural behaviour that underpins every investigation. BPD operates at the intersection of rigorous academic research and site-based forensic practice.
03 — The BPD Diagnostic Standard
Standard RICS HomeBuyer reports identify symptoms. BPD identifies cause. Every investigation follows a clinical Root-Cause Analysis (RCA) methodology: the chain of causation is traced from visible defect to origin mechanism, through material failure, design inadequacy, or maintenance neglect. Independent investigation of building defects, with findings, supporting evidence and limitations explained in a written report. The inspection methods and deliverables are agreed in your scope of work.
04 — Legal & Evidential Standard
Independent investigation of building defects, with findings, supporting evidence and limitations explained in a written report. The inspection methods and deliverables are agreed in your scope of work. Every report sets out its reasoning, supporting evidence and limitations. CPR Part 35 expert witness reports are a separate instruction. The agreed scope identifies the issues, applicable procedural requirements and reporting timetable. The expert's duty is to the court; permission to rely on expert evidence is a matter for the court. CPR Part 35 applies to expert evidence in civil court proceedings; tribunals and arbitrations have their own procedural rules, which are identified in the agreed scope.
“Every building defect is a consequence, not a coincidence. I trace the chain of causation from symptom to source — then prescribe the fix, not the cover-up.”