For a Strata or Facility Manager, few letters are more dreaded than the “Decline to Indemnify” notice from an insurer following a major storm event.
When a basement floods or a roof fails during a storm, the assumption is often that “Storm Damage” cover will automatically apply. However, insurance policies hinge on the concept of Proximate Cause.
Insurers do not pay for maintenance failures; they pay for sudden and unforeseen events. If the Loss Adjuster cannot clearly distinguish between the storm event and the condition of the asset, the claim is often denied.
Based on our forensic work with insurers and legal teams, here are the three most common reasons stormwater claims are rejected—and the evidence you need to challenge them.
1. The “Wear and Tear” Exclusion (Gradual Deterioration)
This is the number one reason for denial. The insurer argues that the damage was not caused by the storm, but by the fact that the asset was old and poorly maintained.
- The Scenario: A basement floods during heavy rain. The Loss Adjuster finds the pumps failed.
- The Denial: “The pumps failed due to lack of maintenance (rust/seized bearings), not because of the storm intensity.”
- The Counter-Evidence: To fight this, you need a Forensic Causation Report. We look for evidence that the maintenance was up to date (logbooks) and prove that the failure was caused by an external factor—such as debris washing in from the street (an insured event) jamming the impeller, rather than mechanical age.
2. The “Pre-Existing Defect” Clause (Faulty Workmanship)
Insurers cover damage, not defects. If a pipe collapses or a pit overflows, the insurer may argue the system was never built correctly in the first place.
- The Scenario: Water enters a building lobby because the surface drains couldn’t cope with the flow.
- The Denial: “The drainage system was undersized at construction. This is a design defect, not storm damage.”
- The Counter-Evidence: We use Hydraulic Modelling (DRAINS) to simulate the storm. If we can prove the design was compliant with the code at the time of construction, and that the storm event exceeded the design capacity (e.g., a 1-in-100-year event hitting a 1-in-20-year system), the claim for the resulting damage may be valid.
3. Ambiguity of Ingress (The “How did it get in?” Problem)
To pay a claim, an insurer needs to know the exact Mechanism of Failure. If you simply say “the carpet is wet,” but cannot prove how the water entered, the claim stalls.
- The Scenario: Water damage is found in a sub-floor area, but there is no obvious hole in the roof or pipe.
- The Denial: “Cause undetermined. Possible rising damp or groundwater seepage (excluded).”
- The Counter-Evidence: This requires Hydrostatic and Dye Testing. We flood specific sections of the drainage network with UV-reactive dye to trace the exact path of the leak. By definitively proving the water came from a cracked stormwater pipe (insured) rather than rising groundwater (excluded), we provide the “smoking gun” required to trigger the policy.
Summary: Evidence Wins Arguments
A denial is often just a request for better evidence.
If you are facing a rejected claim, you don’t need a lawyer yet; you need a forensic engineer. You need independent, scientific proof that separates the “Event” from the “Asset.”
Has your claim been denied due to “Maintenance” or “Defects”?
[Engage Our Forensic Team] to review the decision. We provide the independent Causation Reports and technical evidence needed to substantiate valid claims.
