The Overnight Riser: Vanguard Drywall's Multi-Item Claim
Vanguard Drywall & Acoustics is a subcontractor on a 40-unit apartment project, contracted at $1.9 million, insured under an occurrence-form CGL policy with $1,000,000 per occurrence and $2,000,000 general aggregate.
On 02/11/2025, while Vanguard's crews were hanging and finishing board on floors two through four, a temporary water riser the crew had connected overnight failed. Water ran for about six hours. The general contractor, Alder Grove Builders, reports four heads of damage: $95,000 to remove and replace the drywall Vanguard had already installed; $210,000 for luxury vinyl plank flooring installed by a different subcontractor; $40,000 for the owner's stored appliances; and $120,000 in extended general conditions because completion slipped three weeks.
Vanguard's superintendent learned of the leak on 02/11 but the claim was not reported to the carrier until 05/22. The subcontract requires Vanguard to name Alder Grove as an additional insured for ongoing and completed operations and to waive subrogation. Alder Grove's property insurer has already paid the flooring claim and is demanding reimbursement from Vanguard.
1. Analyze coverage for each of the four heads of damage under the standard CGL form.
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Work through the exclusions item by item rather than treating the claim as one event.
$95,000 drywall: excluded. The exclusion for damage to that particular part of real property on which the insured is performing operations captures the board being hung and finished. The companion exclusion for property that must be restored because the insured's work was incorrectly performed on it also applies, and its exception for completed operations does not help because the work was still in progress. Vanguard bears this cost.
$210,000 flooring: covered. It is another trade's work, not the particular part Vanguard was working on, and it is not the insured's work. There is no standard exclusion for accidental discharge of water, so it is property damage caused by an occurrence.
$40,000 appliances: covered on the same reasoning - third-party tangible property, physically damaged.
$120,000 extended general conditions: contested. The insured should not concede it. Pure economic delay cost is not physical injury to tangible property, and the carrier will argue it is not property damage at all or that it falls within the impaired-property exclusion if the building could be restored by repairing or replacing Vanguard's work. Alder Grove will argue loss of use of the project. Reserve it, tender it, and expect a coverage dispute rather than a clean denial or a clean payment.
2. Does the three-month delay in reporting give the carrier a defense? What should the broker advise?
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Probably not a complete defense, but it creates real risk. This is an occurrence policy, so late notice does not defeat coverage the way it can on a claims-made form. Notice is a condition of the policy, and in most jurisdictions the insurer must show it was prejudiced by the delay before denying. Here the superintendent had actual knowledge on the day of the loss and the carrier learned nothing for over three months - enough time for the carrier to argue that evidence degraded, the water damage was remediated before inspection, or subrogation against the riser supplier was lost.
Advise as follows. Report immediately, in writing, and state the date of discovery so nothing looks concealed. Do not characterize the delay in the notice. Preserve the mitigation photographs, the drying logs, and the riser fitting. Expect a reservation-of-rights letter and cooperate fully; the insurer will defend under a reservation while it investigates the prejudice question.
Separately, fix the process: a superintendent-level reporting rule that any water intrusion reaching another trade's work is reported the same day, with no filter through the project manager. Late notice is the most avoidable coverage dispute in construction claims.
3. Alder Grove's property insurer is pursuing Vanguard. How do additional insured status and the waiver of subrogation interact here, and are they the same thing?
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They are different mechanisms and are routinely confused.
Additional insured status protects Alder Grove against its own liability arising out of Vanguard's operations. It does not reimburse Alder Grove's property insurer for a first-party payment.
The subrogation demand is defeated, if at all, by the contractual waiver of subrogation in the subcontract, not by Vanguard's own policy endorsement. A waiver executed before the loss binds Alder Grove's property insurer, which takes its subrogation rights subject to the defenses Alder Grove had - including the waiver. Enforceability and scope vary by state and by whether the waiver covers the specific peril and the specific parties, so read the clause.
Vanguard's policy-side waiver of subrogation endorsement runs the other direction: it waives Vanguard's carrier's right to pursue others, typically the general contractor and owner. It does not stop Alder Grove's insurer from suing Vanguard.
Advice to the client: tender the flooring claim to Vanguard's carrier under the additional insured endorsement as well, so Alder Grove is defended through the policy, and assert the contractual waiver as a bar to the property insurer's subrogation demand. Confirm the subcontract's waiver language covers property insurance proceeds and names both parties.