Technical evidence is useful only if it addresses the facts needed for the dispute. The July dossier examines how to prepare an independent evidence procedure and avoid asking an expert to decide the legal case.
July 2026 practice dossier. A thematic entry in the annual archive, prepared and legally reviewed on 13 November 2026. This is not a claim that it was published or that legislation changed in that month.
Identify the factual issue
List the observed condition, possible cause and repair questions separately. Provide drawings, photographs and relevant performance requirements in an organised form. The expert may need access, opening-up work and cooperation from several participants. Explain the scope of the inspection precisely; an unstructured request to review the entire project can create unnecessary expense without resolving the decisive issue.
Choose the procedure with the dispute in mind
Section 485 ZPO permits independent evidence proceedings in defined circumstances, including expert assessment of condition, cause and remedial expenditure where the required legal interest exists. This does not itself award payment or finally decide liability. Consider the correct opponents, the intended later claim and the relationship to limitation periods. A private report, joint inspection and court-appointed expert each have different functions and cost implications.
Project review checklist
- Separate technical questions from legal conclusions.
- Prepare access, drawings and opening-up arrangements.
- Assess parties, urgency and limitation before applying.
Four practical examples
These illustrative scenarios are fictional examples, not accounts of client matters.
Cracked floor
Ask about the crack pattern, technical cause and feasible repair methods. A request asking whether the contractor is legally liable puts the wrong question to the technical expert.
Multiple causes
Roof leakage may originate in design, installation or later modification. Include the necessary interfaces and participants in the investigation plan. Otherwise a narrowly framed inspection may leave the central cause unexplained.
Immediate alteration
A tenant fit-out will conceal the disputed installation. Assess whether evidence should be secured before the work proceeds. Record the timing and provide access rather than relying on recollection after concealment.
Repair costs
Two repair options differ substantially in scope. Ask for the technical basis and required expenditure for each suitable method. A bare total without explanation makes commercial settlement more difficult.
Further guidance and sources
Explore the related construction law service