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Construction Products Expert Witness for Product Failure and Materials Disputes
Independent evidence on why a construction product failed — and whether the fault lies with the manufacturer, the designer who specified it, or the contractor who installed it — for arbitration across the GCC and proceedings in the DIFC Courts, ADGM Courts, QICDRC and BICC.
- DIAC
- arbitrateAD
- SCCA
- QICCA
- BCDR
- DIFC Courts
- ADGM Courts
- QICDRC
- BICC
When a waterproofing membrane leaks, a sealant debonds, a coating blisters or a cladding system fails, everyone in the supply chain has a reason to point elsewhere. The manufacturer says the product was installed wrongly. The contractor says it was installed to the data sheet. The designer says the specification was sound. The employer just wants the building to work.
Untangling those positions is a technical exercise, and a tribunal needs evidence it can rely on. A construction products expert witness establishes how the product was meant to perform, how it actually failed, and which link in the chain — manufacture, specification, storage and handling, installation, or use and maintenance — caused the failure.
Products in the Gulf face conditions that test them harder than most: extreme surface temperatures, intense UV exposure, high humidity, salt-laden air and aggressive ground. A product that performs well elsewhere can fail here if it was not selected, detailed and installed for those conditions. We act on product and materials disputes across the UAE, Saudi Arabia, Qatar, Kuwait, Bahrain and Oman.
What a construction products expert witness does
A construction products expert is a materials, building or engineering specialist who gives independent opinion evidence on the performance and failure of construction products and systems. That means:
- Defining intended performance — what the product was designed, certified and warranted to do, by reference to the contract, the specification, the manufacturer's literature and the applicable standards.
- Establishing the failure mode — inspection, sampling and, where needed, laboratory testing to identify exactly how the product failed.
- Tracing the causation chain — distinguishing manufacturing defects from specification errors, storage and handling damage, installation faults and inadequate maintenance, and identifying where more than one cause contributed.
- Testing fitness for purpose — whether the product was suitable for its specific application and the environmental conditions of the project, not just compliant on paper.
- Auditing the supply chain — factory production control records, test certificates, batch data, shipping and storage conditions, and site acceptance records.
- Evaluating the remedy — whether the proposed replacement or repair is necessary and proportionate, or goes further than the defect requires.
“Our overriding duty is to the tribunal or court, not to the party who appoints us.”
Product issues we advise on
Cladding and façade systems
Panel, insulation and fixing system failures, weathertightness, thermal movement and the performance of façade products against their specification and test evidence.
Waterproofing and roofing
Membrane, tanking and roofing failures — material defects, incompatible components, detailing at penetrations and junctions, and protection during construction.
Sealants, adhesives and joints
Loss of adhesion, cohesive failure, UV and thermal degradation, and incorrect product selection for joint movement and substrate.
Coatings and protective systems
Blistering, delamination, chalking and premature breakdown of paints, protective coatings and corrosion protection systems, including surface preparation and application conditions.
Concrete, admixtures and cementitious products
Admixture performance, mix compliance, repair mortars, screeds and grouts, and the interaction between product and placing, curing or environmental conditions.
Flooring, tiling and finishes
Debonding, cracking and discolouration of floor and wall finishes, adhesives and underlayments, including substrate moisture and movement joint issues.
Glass and glazing
Glass breakage, insulated glass unit seal failure, coating defects and framing system performance.
Pipes, fittings and building services products
Leaks and failures in pipework, fittings, valves, insulation and associated components, and the line between product defect and installation or commissioning fault.
Mechanical and electrical equipment
Underperformance and failure of plant and equipment against specification, including suitability for operating temperatures in the region.
Fit-out and joinery components
Doors, ironmongery, joinery, partitions and other fit-out products that have failed, warped or degraded prematurely.
Product failure: how cause is established
Most product disputes come down to one question: was it the product, or what was done with it? We answer that by working through each possible cause on the evidence:
- Manufacture — was the product made to its declared specification, consistently across batches?
- Specification and selection — was the right product chosen for the substrate, exposure and service conditions?
- Storage and handling — was it stored, transported and protected in line with the manufacturer's requirements, including temperature and shelf-life limits?
- Installation — was it applied or fixed in accordance with the data sheets, method statements and approved details?
- Use and maintenance — was it used as intended and maintained as required after handover?
Failures frequently have more than one cause. Part of our role is to identify each contributing cause and explain its significance, so the tribunal can decide how responsibility should be allocated.
When a compliant product still fails
A product can carry the right certificates, meet the cited international standard and still fail on a Gulf project. Test standards are often developed for milder climates, and laboratory conditions may not reflect sustained surface temperatures, thermal cycling, UV intensity or salinity on site.
Where that happens, the question shifts from "did the product comply?" to "was it the right product for this application?" — which can move responsibility from the manufacturer to whoever specified or approved it. We assess whether the standard was adequate for the service conditions, whether the product's stated limitations were respected, and whether the failure reflects a product limitation, a specification error, or both.
Products, structural and quantum: working together
Product failures rarely stay contained. A failed membrane leads to corroded reinforcement; a failed façade bracket becomes a structural question; every remedy has a cost and often a delay. The technical evidence and the valuation must line up, or the claim is exposed.
We coordinate with structural and quantum experts so that the cause, the remedial scope and the cost tie together, and the tribunal can follow the link from product, to failure, to remedy, to value.
How an engagement works
- 1
Conflict check and initial call
A short, confidential conversation about the product, the failure, the parties in the supply chain and the timetable. We complete a conflict check before receiving any documents.
- 2
Scope and letter of instruction
We agree the technical questions to be answered, the documents, samples and site access required, and the programme and fee basis.
- 3
Records review and site inspection
We review the specification, submittals and approvals, manufacturer's literature, test certificates and installation records, then inspect the failure on site. Where possible, inspections and sampling are carried out jointly with the opposing expert under an agreed protocol.
- 4
Sampling and testing
Where the evidence requires it, we specify sampling and laboratory testing — with chain-of-custody arrangements so the results are not challenged later — proportionate to the issues and sums in dispute.
- 5
Expert report
An independent report setting out the intended performance, the observed failure mode, the cause of the failure, our opinion on fitness for purpose and our assessment of the appropriate remedy.
- 6
Joint meetings and the hearing
Meetings with the opposing expert, a joint statement of agreed and disagreed issues, and oral evidence at the hearing, including expert conferencing where the tribunal directs it.
Independence and professional standards
Our evidence is prepared to meet the expectations tribunals and courts place on experts in the region, including:
- the IBA Rules on the Taking of Evidence in International Arbitration (2020), where adopted;
- the CIArb Protocol for the Use of Party-Appointed Expert Witnesses in International Arbitration;
- the procedural rules of the relevant arbitral institution, such as the DIAC 2022 Arbitration Rules; and
- the expert evidence requirements of the DIFC Courts, ADGM Courts, QICDRC and BICC.
Every report includes a declaration of independence and a statement of the expert's duty to the tribunal or court.
Where we act
Arbitration
Institutional and ad hoc arbitrations across the GCC, including DIAC (Dubai), arbitrateAD (Abu Dhabi), SCCA (Saudi Arabia), QICCA (Qatar), BCDR (Bahrain), KCAC (Kuwait) and OAC (Oman), as well as ICC and other international rules with a GCC seat or GCC project.
Offshore courts
DIFC Courts (including the Technology and Construction Division), ADGM Courts, the Qatar International Court and Dispute Resolution Centre, and the Bahrain International Commercial Court.
Where we act: independent expert witness services in arbitration across the GCC and in the DIFC Courts, ADGM Courts, QICDRC and BICC. We do not provide expert evidence in onshore court proceedings.
View all GCC locationsSectors
- Residential and commercial towers
- Hospitality and mixed use
- Retail and fit-out
- Healthcare and education
- Infrastructure and transport
- Rail and metro
- Aviation
- Industrial and process
- Energy and utilities
- Renewable energy
- Water and wastewater
- Marine and coastal structures
Who we work with
For lawyers and in-house counsel
Product disputes often involve multiple parties and back-to-back claims up and down the supply chain. We help frame the technical issues early, design a sampling and testing programme that will stand up, and give evidence on causation and fitness for purpose that maps to the pleaded case against each party. We act as party-appointed expert, tribunal-appointed expert or in a confidential advisory role.
Discuss an instructionProduct disputes often involve multiple parties and back-to-back claims up and down the supply chain. We help frame the technical issues early, design a sampling and testing programme that will stand up, and give evidence on causation and fitness for purpose that maps to the pleaded case against each party. We act as party-appointed expert, tribunal-appointed expert or in a confidential advisory role.
Discuss an instructionWhat you receive
- An early, candid technical view of the failure and its likely causes
- A proportionate sampling and testing plan, with chain-of-custody controls
- A clear, independent expert report with photographs, test results and reasoning the tribunal can follow
- An opinion on fitness for purpose and on the necessary and reasonable remedy
- A joint statement with the opposing expert that narrows the issues
- Clear, consistent oral evidence under cross-examination
Frequently asked questions
Need a construction products expert witness?
Tell us about the product, the failure, the parties involved, the forum and the timetable. We'll complete a conflict check and come back to you promptly.
Discuss an instructionPlease do not send confidential documents until a conflict check has been completed. Where possible, preserve failed materials and avoid remedial work until evidence has been recorded. If a failure raises an immediate safety concern — including façade or fire safety — contact the relevant authority and a qualified engineer without delay.