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Sudden vs gradual: why your water damage claim was denied

Gerald Burns, Licensed Insurance Agent · August 2026

Water damage is one of the most common property claims and one of the most commonly denied. The reason is almost never the amount of water. It is how long the water was running.

The line every property policy draws

Standard property forms cover water that escapes suddenly and accidentally — a supply line lets go, a tank splits, a valve fails. The same forms exclude continuous or repeated seepage over a period of weeks or months. A pipe that bursts on Tuesday is a claim. A pipe that has been weeping behind the drywall since spring is maintenance.

What the adjuster is actually looking for

Duration, and the building tells on you. Rot in the subfloor, tide lines on the drywall, mineral staining, rusted fasteners, mold behind the vanity — none of that happens in a day. An adjuster who finds those is not disputing that you had water. They are establishing that you had water for a long time, and that moves the loss from the covered column to the excluded one.

Frozen pipes have their own condition

If a pipe freezes and splits, the claim usually turns on whether the building was heated or the system drained. Leave a property unheated over winter with water in the lines and most forms will decline it. Keep the heat on, or shut the water off and drain it — and if the building is empty, do both.

Empty buildings make this much worse

A slow leak in an occupied building gets noticed in a day. The same leak in a unit between tenants runs until somebody opens the door, by which time the duration argument has already been lost — on top of whatever the vacancy clause has already suspended. If a property is going to sit empty, someone needs to physically walk it on a schedule.

What actually helps

Fix small leaks the week you find them, not the month. Photograph the repair and keep the invoice — that is your evidence the problem was addressed, and it dates it. Know where the main shutoff is. If a unit sits empty, inspect it and write down when you did. And when a loss does happen, report it straight away: a delayed report gives the duration argument a head start.

None of this is about arguing your way through a claim. It is about the difference between a loss the policy was written to pay and one it was written to exclude — and that difference is usually decided months before the water shows up. See our landlord insurance page.