Subcontractor Pipe Failure: Additional Insured, Your Work and the Umbrella
Ridgeline Construction is general contractor for a six-storey office fit-out. Its CGL is written on an occurrence form with limits of $1,000,000 each occurrence, $2,000,000 general aggregate, $2,000,000 products-completed operations aggregate, a $50,000 deductible per occurrence, and the standard "your work" and "impaired property" exclusions. The owner, Meridian Properties, is named as additional insured under an endorsement restricted to liability arising out of Ridgeline's ongoing operations. Ridgeline also carries a $5,000,000 umbrella on a following-form basis above the CGL. The HVAC installation was subcontracted to a licensed mechanical firm carrying $1,000,000 of its own cover. In September a chilled-water pipe installed by that subcontractor failed at a joint. Water damaged $340,000 of tenant improvements and $1,100,000 of Meridian's computer equipment, and the building was unusable for six weeks at a rent loss of $260,000. Meridian also claims $180,000 to repair the pipe and re-test the system. Ridgeline's site supervisor had signed off on the pressure test without witnessing it.
1. Analyse coverage for each head of Meridian's claim under the CGL, applying the exclusions as they are actually drafted.
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Separate the claim into four buckets and test each exclusion against the wording, not against a general impression that "defective work is never covered".
1. Tenant improvements - $340,000. Damage to property other than the work itself, caused by the subcontractor's failed joint. The "your work" exclusion bars damage to the insured's own work, but the standard form contains a subcontractor exception: the exclusion does not apply where the damaged work, or the work out of which the damage arose, was performed on the insured's behalf by a subcontractor. That exception is the whole answer here. Covered.
2. Computer equipment - $1,100,000. Physical injury to tangible property of another party, directly caused by the water. The impaired property exclusion does not apply, because that exclusion requires property that can be restored by repairing or replacing the insured's work and has not been physically injured. This equipment was physically damaged. Covered.
3. Rent loss - $260,000. CGL covers loss of use of tangible property that has not been physically injured, caused by an occurrence. Meridian could not use the building for six weeks. Covered, inside the same each-occurrence limit.
4. Repair and re-test of the pipe - $180,000. This is the cost of making good the insured's own defective work and of re-testing it. The "your work" exclusion and the "that particular part of any property that must be restored because your work was incorrectly performed" wording bar it. Excluded. Recovery, if any, lies against the HVAC subcontractor, not the CGL.
2. Calculate how the loss runs through the primary and umbrella layers, and test whether the additional insured endorsement responds to Meridian's claim.
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The covered total. $340,000 + $1,100,000 + $260,000 = $1,700,000. The excluded $180,000 does not enter the layers.
Primary layer. $1,000,000 each occurrence. The $50,000 deductible applies to the occurrence and is borne by Ridgeline, not by Meridian - the additional insured endorsement typically waives the deductible as between insureds, so Meridian is not asked to contribute. Primary pays $1,000,000.
Umbrella layer. Following form, $5,000,000 excess of $1,000,000. The umbrella drops down to pay the $700,000 excess of the primary limit, and it adopts the primary's exclusions, so it also declines the $180,000 pipe repair. Umbrella pays $700,000. Total $1,700,000 fully funded.
Additional insured status. Meridian's endorsement is limited to liability arising out of Ridgeline's ongoing operations. The failure occurred during the fit-out, before completion, so the ongoing-operations wording is satisfied and Meridian is an insured for these claims. Two traps: if the pipe had failed after handover, Meridian would need a completed-operations additional insured endorsement, which is a different form; and if Meridian's own negligence contributed, the endorsement may be written on a contributory-only basis, in which case the insurer defends but pays only Meridian's share. Confirm the actual endorsement number before committing.
3. Ridgeline's supervisor signed off on the pressure test without witnessing it. Explain the insurer's recovery options and the risk-management implications.
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Subrogation against the HVAC subcontractor. The insurer stands in Ridgeline's shoes and can pursue the mechanical firm for the water damage. But subrogation against an insured's own subcontractor is often barred or restricted by a waiver-of-subrogation clause in the construction subcontract, and by any additional insured or cross-liability wording in the subcontractor's policy. Read the subcontract before spending money on recovery; if Ridgeline waived subrogation, the recovery is gone and the underwriter should know that for rating.
Contractual gap. The subcontractor carried only $1,000,000, while the damage from its work reached $1,700,000. Ridgeline's own contract should have required limits matching the project's probable maximum loss, and an additional insured endorsement naming both Ridgeline and Meridian. That is a risk-transfer failure, and it feeds directly into the next underwriting.
The pressure test. Signing off without witnessing it is a false record and a supervision failure. It does not create coverage - the CGL responds to the resulting property damage regardless of the supervisor's negligence - but it does three other things: it exposes Ridgeline to a contractual indemnity claim from Meridian, it may void the subcontractor's warranty obligations, and it is a credibility problem in any subsequent dispute. If the sign-off was recorded as witnessed when it was not, treat it as a potential misrepresentation and escalate internally rather than handling it as a routine claim note.
Risk management recommendations: require witnessed pressure testing with photographic evidence; raise subcontractor insurance minimums to the project PML; require completed-operations additional insured status; and audit subcontractor certificates at inception, not at claim time.