Slow Leak, Mold, and Business Property on an HO-3
An HO-3 with no endorsements shows Coverage A $400,000, Coverage C $200,000, and a $2,500 all-peril deductible. In February the insured noticed water staining on the first-floor ceiling. A plumber found a pinhole leak in a copper supply line behind an upstairs wall; the wall had been damp long enough that drywall had begun to crumble. The insured admits the stain "had been there a few weeks, maybe since New Year." On the day of the plumber's visit the corroded line finally split and sprayed water across the second floor before the main was shut off.
Damage: $19,000 from the long-term seepage (drywall, subfloor, ceiling texture); $3,000 from the final split-and-spray; $9,000 mold remediation in the wall cavity; $4,000 of inventory for the insured's online craft business stored in the spare bedroom; $3,000 damage to a detached garage the insured rents to a neighbor for $150 a month to store furniture (no vehicles).
1. The insured wants the full $22,000 of water damage. Separate the $19,000 seepage damage from the $3,000 split-and-spray and state what is payable.
Read the worked answer
Two different perils with two different answers - this is a causation question, not a "water damage" question.
- $19,000 seepage loss - excluded. The HO-3 excludes constant or repeated seepage or leakage of water over a period of 14 days or more. The insured's own timeline (stain present "a few weeks," drywall already crumbling, corrosion progressing since roughly New Year's) establishes 14+ days of repeated leakage. Long-term, gradual damage is maintenance/peril-of-time loss, not a fortuitous event.
- $3,000 split-and-spray - covered. The sudden splitting of the corroded line and the resulting discharge is accidental discharge of water, a Coverage C/A peril. It is a discrete event on a specific date, not a continuation of the seepage.
- Deductible: $2,500 applies once to the covered loss. $3,000 − $2,500 = $500 payable on the water damage.
Watch for the insured's argument that the seepage "caused" the split. The exclusion applies to the seepage damage; the final rupture remains a covered, separately-caused event. Conversely, do not let the rupture pull the 19 days of seepage damage back into coverage.
2. The $9,000 mold remediation and the $4,000 of craft inventory - how much, if anything, does the policy pay for each?
Read the worked answer
Mold: $0 on these facts.
- HO-3 mold is not a standalone peril; it is covered only when it results from a covered cause of loss, and then subject to a sublimit (commonly $10,000 in the base form).
- Here the mold grew in the wall cavity that had been wet for weeks - i.e., it flows from the excluded seepage. No covered peril, no mold coverage. The $10,000 sublimit is irrelevant because the threshold causation question fails.
- If some mold could be traced to the three-hour spray event, a portion might fall under the sublimit, but remediation inside a cavity wet for weeks will not allocate that way.
Business inventory: capped at $2,500.
- The HO-3 caps property in or upon the residence premises used primarily for business purposes at $2,500 (with a much smaller off-premises limit).
- The $2,500 is a special limit, not a deductible item - the single $2,500 deductible was already exhausted on the water loss, so the inventory pays $2,500 of the $4,000.
- The insured's real gap is a commercial/business property endorsement or a separate policy for the inventory and any business liability exposure.
3. The $3,000 detached garage damage: the insured argues it is a Coverage B structure. Is it? Then state the total the insurer owes on the whole claim.
Read the worked answer
The garage is excluded.
- Coverage B covers other structures on the residence premises, but excludes structures rented to others. The narrow exception is a structure rented as a private garage - i.e., for parking a vehicle.
- This garage is rented for $150 a month to store furniture. That is a storage rental, not a private garage, so the exception does not apply. The structure is also arguably used in a business pursuit, which reinforces the exclusion. $0.
- If the insured wants this back, the answer is a dwelling/other-structures landlord form or an endorsement deleting the rental exclusion.
Total payable:
| Item | Amount | Coverage |
|---|---|---|
| Seepage damage | $19,000 | $0 |
| Split-and-spray | $3,000 | $3,000 |
| Deductible | - | ($2,500) |
| Mold | $9,000 | $0 |
| Business inventory | $4,000 | $2,500 |
| Rented garage | $3,000 | $0 |
| Net to insured | $3,000 |
Against $22,000 claimed, the file pays $3,000. The letter should explain the seepage timeline, the mold causation link, the business-property special limit, and the rental exclusion separately so each denial stands on its own.