The leak was slow, so the policy says it was yours to notice.

Insurance prices unpredictable events. A pipe that bursts without warning is one. A joint that has been weeping for a year is maintenance: the damage accumulated slowly, and the policy treats noticing and fixing it as the owner responsibility. Regulators describe the position the same way insurers do.

Whether that is fair is a separate argument from whether it is what the contract says. The contract is what decides your claim.

Where the water was a gradual loss, the mold that grew from it is excluded for the same reason, not as a separate decision. Where the water was sudden and covered, resulting mold is usually handled within that claim, often subject to a limit. The cause of the water is what decides it, not how much growth there is.

EPA sets the practical line for the work at about 10 square feet: below it, most homeowners deal with it themselves; above it, containment and negative air are the job.

Dry the structure properly anyway. An uncovered claim is not an uncovered problem: wet framing keeps feeding growth, and the second round costs more than the first. Get the source fixed, get the material dry to a reading rather than to the touch, and keep the drying log.

The log is worth keeping even with no claim. It is what you show a buyer, a surveyor or a future insurer when they ask what was done.

A refused claim does not have to be the end of the conversation with your insurer either — ask which clause they relied on, in writing. Sometimes the answer reveals a misunderstanding about the timeline.