Building Inspection Services You Can Trust
Expert Witness Services for NCAT Building Defects, Water Ingress & Mould in Sydney
When building defects lead to dispute, the outcome often depends on the quality of the evidence. Sydney Building Diagnostics provides independent expert witness and technical reporting services for homeowners, strata owners, purchasers, solicitors and property professionals across NSW. We specialise in building defect investigations involving water ingress, waterproofing failures, mould, poor workmanship and unresolved rectification works.
Why Expert Evidence Matters
In NSW Civil and Administrative Tribunal (NCAT) and other dispute forums, allegations alone are rarely enough. Matters are strengthened by clear, evidence-based reporting that identifies:
• What defects are present
• Probable cause of failure
• Extent of damage
• Relevant standards or building obligations
• Rectification pathway
• Supporting photographs and testing results
Our Areas of Expertise
Water Ingress Investigations
Leaks through balconies, roofs, windows, external walls and wet areas.
Waterproofing Failures
Shower leaks, balcony membrane failures, drainage issues and poor detailing.
Mould and Dampness
Moisture related mould growth, water damaged materials and indoor environmental concerns.
Poor Workmanship
Non-compliant finishes, incomplete works and failed rectification attempts.
Building Defect Disputes
Independent reporting for owners involved in builder, strata or contractor disputes.
Who We Assist
• Homeowners
• Apartment owners
• Strata owners corporations
• Purchasers
• Solicitors
• Property managers
• Commercial clients
Typical Matters We Are Engaged For
• Building defect disputes
• Water ingress and leak claims
• Balcony, roof and window leak matters
• Builder defect and rectification disputes
• Mould and moisture related claims
• Waterproofing failures
• Insurance related matters
• Latent defect investigations
Our Reporting Services
Depending on the matter, we can provide:
Preliminary Defect Reports
Useful for early negotiations and understanding likely issues.
Expert Witness Reports
Prepared for formal dispute proceedings where expert evidence is required.
Scott Schedules
Rectification scope and cost schedules
Supplementary Reports
Responses to new evidence, builder reports or changed circumstances.
Testing and Investigation Methods
• Visual building inspection
• Moisture mapping
• Thermal imaging
• Controlled water testing
• Roof and balcony defect review
• Mould sampling and interpretation
• Review of plans, correspondence and prior reports
NCAT Building Defect Matters
We regularly assist clients preparing for matters in NSW Civil and Administrative Tribunal involving:
• Residential building defects
• Water ingress claims
• Waterproofing disputes
• Rectification disagreements
• Expert evidence preparation
We provide technical evidence only and do not provide legal advice.
Frequently Asked Questions
Do I need an expert witness for NCAT?
Not every matter requires one, but technical disputes involving leaks, causation or conflicting opinions often benefit from expert evidence.
Can you inspect before I lodge NCAT?
Yes. Early evidence collection is often the best approach.
Can mould be part of a building defect claim?
Yes, where mould is linked to moisture intrusion or defective work.
Do you attend hearings?
Further services may be available depending on the matter.