Defect-related disputes are the most common source of conflict in construction insurance claims. Understanding the distinction between a defect and the resultant damage it causes is the foundation of getting construction coverage right.
The Core Distinction: Defects vs. Resultant Damage
Contract works insurance typically does not cover the cost of fixing a defect itself. What it covers is the resultant damage caused to non-defective parts of the structure by that defect.
In plain terms
A faulty waterproof balcony membrane is the defect. The cost of remediating it is excluded. However, the water damage it causes to internal walls, flooring, electrical fittings etc is the resultant damage which is covered. The policy responds to the consequence, not the cause.
Understanding the DE Clause Framework
MECON uses DE4; this clause is the typical cover available in the market. Under DE4, the insurer excludes the defective part but covers physical damage to all surrounding non-defective property. The table below shows how the clause series compares:
Why Disputes Are So Common
Aside from what constitutes “physical damage”, the most contested question in any DE4 claim is simple: where does the defective component part end and the resultant damage begin? These boundary disputes drive the majority of construction insurance litigation.
Documentation gaps make this worse. Without photos, inspection reports and contemporaneous records, establishing causation can be difficult in claims scenario and disputed outcomes can occur.
Case Study: Cover Advantage Endorsement in Action
SERVICE STATION — BASEMENT STRUCTURAL FAILURE
The Situation
A small business constructing a service station experienced significant failure when sheet piling buckled under load. The root cause was defective design—the dewatering and sheet piling system had been inadequately engineered to handle actual ground pressure conditions.
The Problem
A defective design claim of this nature would have been substantially excluded under a standard DE4 contract works policy. The defective system in this case was the sheet piling. It would be treated as the excluded component part. Without broader cover, the client faced bearing the full cost of rectification themselves.
The Outcome
The client had purchased MECON’s Cover Advantage Endorsement, which removes certain standard exclusions at the option of the Insured. In this, case the Insured elected to remove the defects exclusion.
$500,000
Indemnity paid
What Brokers May Do
- Explain DE4 mechanics at inception so clients understand the defect/resultant damage boundary before a claim arises.
- Encourage thorough documentation photos and inspection reports are important in any disputed claim.
- For the most comprehensive cover, discuss the Cover Advantage Endorsement at placement.
Speak to your BDM or MECON Regional Manager about Cover Advantage.