Defective Work Claims: How Forensic Investigation May Support Liability Evaluation

Consider a hypothetical: a condominium association discovers water staining behind exterior cladding years after project completion. Depending on the governing state’s approach to coverage, the general contractor’s Commercial General Liability (CGL) insurer might owe coverage for resulting interior damage in one jurisdiction, while the same loss could fall outside the policy in another.

The outcome often depends on the governing jurisdiction and policy language, and a forensic investigation may also affect the characterization of the damage mechanism.

Defective work claims involve construction contract law and insurance coverage; forensic engineering often supplies the technical causation record, identifying what appears to have failed and connecting a failure mechanism to a contractor, designer, product, maintenance condition, or policy period.

Key takeaways: How forensic findings may affect defective work claims

Claims professionals and construction litigators handling defective work claims often use forensic investigation to connect technical causation to coverage and liability questions. Findings from that investigation may affect the claim file across both coverage analysis and liability or testimony questions.

What findings affect coverage

• Whether defective work is a covered occurrence under a CGL policy depends on the governing state’s approach, the specific policy language, and what the investigation indicates was damaged
• Dating when property damage began may help identify which policy periods respond
• Separating defective components from consequential damage may help define the covered scope of loss

What findings affect liability and testimony

• Comparing as-built conditions against contract documents may clarify disputed workmanship issues
• Documented methodology may support admissibility under amended Federal Rule of Evidence 702, while a maintained chain of custody separately supports the weight and credibility of the underlying evidence

To discuss forensic investigation for a specific defective work matter, contact Rimkus.

What is a defective work claim in construction?

A defective work claim asserts that construction work fails to conform to the contract documents, referenced standards or codes, or generally accepted craft standards, focusing on means, methods, and installation quality measured against what the contract required.

How defective work claims differ from general construction defect claims

Defective workmanship is one cause category within the broader construction defect umbrella, which may also involve design deficiencies, defective materials, code issues, or failures to meet accepted trade standards. 

Workmanship issues may implicate the installing contractor, while deficiencies in plans and specifications may point elsewhere; under the Spearin doctrine, a contractor bound to owner-provided plans generally may not be responsible for consequences of defects in those plans, depending on governing law and facts.

Patent vs. latent defects and their claims implications

A patent defect is apparent on reasonable inspection; a latent defect is not. The label classifies observability and can affect timing, but it does not determine liability. Discovery rules can delay the limitations period for latent defects until the claimant discovered or should have discovered the deficiency, while statutes of repose typically run from a fixed event such as substantial completion regardless of discovery.

This discovery-based framework for limitations periods is a related but distinct legal question from how CGL policies treat known or ongoing damage. Many modern CGL forms include a known-loss or prior-damage provision that can treat continuing property damage known before a policy period as known throughout that period, though the precise effect depends on the specific policy language and governing state law. An observable defect may still bear on which later policies respond.

What triggers a forensic investigation in defective work claims?

Forensic investigation typically begins when causation or scope questions exceed what routine adjusting can resolve, often when design issues, product performance, weather exposure, maintenance history, and workmanship deficiencies contribute to a building performance problem in combination.

When standard claims handling is insufficient

Several circumstances commonly push a defective work claim beyond standard handling:

• Causation is genuinely disputed among design, workmanship, product, and maintenance explanations
• Damage is concealed behind finishes or assemblies
• Laboratory methods, such as microscopy or moisture testing, may be needed
• Multiple potentially responsible parties may require evidence tied to a specific scope of work
• Litigation is present or reasonably anticipated

The claim file’s value in these situations often rests on analysis that can withstand opposing expert scrutiny.

Evidence preservation and the investigation window

The duty to preserve evidence generally arises when litigation is reasonably foreseeable, extending beyond retention to the evidence’s condition; premature repairs can create spoliation disputes in which parties argue that claims or expert opinions have been prejudiced. Parties often address remediation timing by providing notice and inspection opportunities before repairs, and destructive testing warrants similar planning, since allowing opposing experts to observe the testing can narrow later disputes about it.

Investigators establish chain of custody at collection and maintain it through final disposition, supporting later testimony about an item’s origin and whether its condition changed.

How do forensic investigators evaluate defective work?

Forensic evaluation often begins with investigation planning, followed by data collection, testing protocol development, analysis, and presentation of conclusions. Methods typically depend on the building system, alleged defect, and applicable standards at the relevant time, and investigators commonly test failure hypotheses against physical evidence rather than working backward from a preferred answer.

An engagement letter typically defines scope, methods, deliverables, and fee terms, revisited in writing as facts develop. The expert typically selects and applies the methodology independently, considers reasonably likely alternative causes, and avoids becoming an advocate for a predetermined outcome.

Document review and construction record analysis

Contract documents often establish the conformance baseline, and investigators typically assemble plans, as-built drawings, inspection records, and maintenance records to compare as-built conditions against what those documents required. Contemporaneous project records can also clarify installation sequence, material source, and weather exposure when contested.

Site inspection and physical evidence collection

A condition survey can document visible distress before assemblies are disturbed, and investigators commonly photograph systematically, recording each image’s location so later reviewers can connect observations to specific building areas. 

Large losses may call for drones, lidar, or other documentation tools to record evidence positions before removal, methods the National Institute of Standards and Technology (NIST) used at the Champlain Towers South collapse. 

Nondestructive techniques generally precede invasive sampling when they may provide useful information without altering the condition.

Materials testing and standard-of-care evaluation

Materials testing can measure whether in-place work meets specified properties: investigators can obtain concrete cores under ASTM International (ASTM) C42 to evaluate compressive strength when test results or observed distress raise questions, and testing of reinforcing steel may quantify strength or corrosion effects. 

Standard-of-care evaluation measures a professional’s conduct against what similarly situated practitioners would have done in the same time, place, and circumstances, though NIST itself does not consider findings of fault or negligence in its building failure investigations.

How may forensic findings inform coverage and liability evaluations?

Coverage for defective work is rarely a simple covered-or-not-covered question. It often turns on whether a claim seeks repair of the insured’s own faulty work, generally treated as a business risk outside CGL coverage, or recovery for resulting damage to otherwise nondefective property, which coverage more commonly reaches. Coverage analysis often starts with occurrence and timing before reaching that boundary between the defect and its consequences.

Because coverage law varies by state, investigation findings do not create the legal answer alone; they instead supply the factual record that counsel and courts apply to the governing law.

Occurrence tests and the business-risk distinction

Whether defective work constitutes an occurrence is among the most contested questions in construction defect coverage, and courts generally fall into three broad camps. The broad approach is often illustrated by the Florida Supreme Court’s J.S.U.B. decision, frequently cited for the proposition that defective work causing resulting damage may constitute an occurrence, rather than for the broader claim that all faulty workmanship qualifies as an accident. 

A narrower approach finds an occurrence only where defective work injures nondefective property, while a third approach, including Pennsylvania under Kvaerner, holds that faulty workmanship cannot satisfy the definition of occurrence.

The specific outcome in a given matter can depend on state supreme court precedent, intermediate appellate authority where the high court has not ruled, the applicable policy form edition, whether a subcontractor was involved, and whether the insured is a general contractor, subcontractor, or design professional.

New Jersey’s Weedo decision, an early and frequently cited business-risk case, illustrates the underlying distinction: peeling stucco that requires reapplication is characterized as the contractor’s business risk, while stucco that falls and injures a passerby is treated as the kind of harm insurance exists to share. Later decisions and subsequent CGL policy revisions have added further nuance to this line of reasoning in many jurisdictions.

Broad-camp jurisdictions often draw a similar line through the “your work” exclusion, softened since 1986 by a subcontractor exception that can preserve coverage where a subcontractor performed the damaged work, though the exception’s effect still depends on the specific policy form, facts, and jurisdiction rather than resolving coverage universally. Forensic investigation can map which components are nonconforming and which sound components those defects harmed, helping define the covered scope of loss.

Determining when damage first occurred and which policy periods are implicated

Occurrence-form CGL policies generally respond to property damage during the policy period, and the nonconforming act frequently precedes physical injury by years. Injury-in-fact jurisdictions look to when actual physical injury first occurred, manifestation jurisdictions look to when effects became reasonably apparent, and under a continuous-trigger approach, every policy in effect while deterioration continued may be implicated.

Forensic evidence dating the onset and advance of the loss may supply the factual basis each theory operates on.

How does forensic investigation assist multi-party liability apportionment?

Most construction losses involve multiple contributing actors, and apportioning responsibility among them can be legally required and analytically difficult. Forensic investigation may help connect each alleged defect to a scope of work, time period, and damage mechanism.

Evaluating responsibility across overlapping scopes of work

Tradespeople working for different contractors assemble a building enclosure piece by piece, often with limited coordination, and a single water-intrusion path may cross framing, sheathing, flashing, sealant, cladding, roofing, and design scopes. Investigators often evaluate whether each failure mechanism is associated with a specific scope by comparing as-built conditions against that trade’s contract requirements. When governing law requires allocation, experts commonly document both the allocation and its basis.

Supporting contribution claims across multiple CGL carriers

When property damage spans policy years, the allocation method often depends on the forum: pro-rata jurisdictions divide loss by time on risk, while all-sums jurisdictions may permit the policyholder to collect the entire loss from any triggered policy, which may then pursue contribution from other carriers. Findings on when harm began and which scope produced it may provide evidentiary support for that allocation, issues that in complex matters may involve expert assistance alongside forensic engineering analysis.

What role does expert testimony play in defective work claims?

Forensic findings reach the trier of fact through expert testimony, and admissibility often turns heavily on documented method. Construction disputes may require different expert roles, including standard-of-care, causation, damages, and delay-analysis experts, particularly when the same record bears on causation, allocation, and repair scope.

Rule 702 and the gatekeeping standard

The December 1, 2023, amendment to Rule 702 of the Federal Rules of Evidence did not create a new standard so much as make explicit an existing one: it clarifies that the proponent must show, by a preponderance of the evidence, that testimony rests on sufficient facts or data, reliable methods, and reliable application to the case. 

Under Daubert and Kumho Tire, federal judges act as gatekeepers for engineering testimony, asking whether the expert applies the same rigor in court as in ordinary practice; state courts apply their own rules, so the standard depends on the forum.

Parties once argued that deficiencies such as unrepresentative sampling or a broken chain of custody affected only the weight of testimony, but the amendment raises the stakes: opponents may now frame the same deficiencies as admissibility questions.

Report rigor and the reliability record

Expert reports typically identify source documents, cross-reference exhibits, and state which opposing positions are accepted or rejected and why. A complete factual record matters since assumptions used to fill gaps may increase challenge risk, and the expert’s role generally is to help the fact finder understand the record rather than advocate beyond what the methodology supports.

Connecting failure mechanisms to potential coverage issues

A single forensic investigation’s findings often support more than one of the questions addressed above. The same documented record of what failed, when, and why can inform the occurrence and trigger analyses, the business-risk distinction, allocation of consequential damage among trades, and contribution claims among carriers.

Rimkus Forensic Services offers forensic engineering expertise, root cause analysis methodology, materials testing, and expert witness services for construction defect and defective work disputes. To discuss potential forensic investigation services for a defective work claim, contact us.

Frequently asked questions about defective work claims

What contractual clauses typically deal with defective work and how do they work?

Contractual clauses addressing defective work commonly include quality and workmanship provisions, inspection and rejection rights, notice-and-cure procedures, and termination-for-default clauses. These provisions establish the performance benchmark, allow owners to reject nonconforming work, and structure the notice and repair process before more significant remedies apply.

What rights and remedies does a client have when defective work is discovered?

Clients may have contractual or statutory rights to demand repair, obtain a price reduction, withhold proportionate payment, or in serious cases terminate the contract, depending on governing law and contract terms. These remedies typically require timely written notice and a reasonable opportunity for the contractor to correct the defect before broader remedies are pursued.

What quality control practices are commonly used to reduce defective work on a project?

Project teams commonly apply quality controls throughout design and construction rather than relying solely on final inspection, including constructability reviews, progressive inspections, and documented hold points. Root cause analysis and defect trend tracking on similar scopes may also help shift quality management upstream rather than addressing problems only after they surface.