Does Buildings Insurance Cover Leaks?
Usually, if the leak is sudden, like a burst pipe. Gradual leaks and the mold they cause are typically excluded.
Free to compare
Why the same word 'leak' gets two different answers
A pipe that bursts overnight and soaks the floor is sudden and accidental, so your dwelling coverage and personal property coverage respond, minus your deductible. A slow drip under the sink that you didn't notice for months is treated as a maintenance problem, and so is the mold that grows from it, because insurers expect homeowners to catch and fix that kind of thing. A backed-up sewer or drain falls outside both of these. It's usually excluded unless you added sewer backup coverage as an endorsement, which most policies offer for an extra cost. Check your declarations page for that endorsement by name. Either way, shut off the water, stop the source if you can, and take photos before you clean up or call anyone.
Policies vary on exactly where sudden ends and gradual begins, and on whether sewer backup coverage is already on yours. One insurer's wording on long-term seepage, or its sublimit for mold cleanup, can leave more of the repair bill on you than another's. Comparing policies side by side shows which one actually pays for the kind of leak your house is likely to have.
What to do first, and what happens after you report it
Turn off the water at the source or at the main shutoff if you can't find the source fast. Then stop it from spreading further if that's safe. Drape towels over furniture, move anything that can be moved, run a wet vac if there's one in the house. Photograph the water, the damaged floor or ceiling, and the source itself, like the pipe or the appliance, before you touch anything. An adjuster who sees clear photos of the break has an easier time approving the claim than one who has to take your word for how it happened.
Call a plumber before or soon after you call to report the claim. The repair bill for fixing the pipe or the appliance itself usually isn't covered. That part is maintenance. But the plumber's report often becomes the evidence that decides the rest of the claim. A plumber who writes that a pipe failed suddenly due to a hidden defect supports a sudden-and-accidental claim. One who writes that corrosion is consistent with a leak of several months supports a denial. Ask for a written invoice either way.
Dry the area out fast. Insurers expect homeowners to prevent mold from taking hold once water damage has already happened, even when the original leak was covered. Running fans, a dehumidifier, or hiring a water mitigation company within a day or two is the kind of thing that shows up favorably if the claim is ever questioned. Waiting a week and then reporting mold alongside the water damage makes it harder to tell which part was the sudden event and which part grew because nobody dried the room.
Keep every receipt from this point. Mitigation equipment, a hotel room if the house is unlivable, the plumber's invoice, anything bought to protect what's left. Homeowners policies typically include additional living expenses coverage for a displacement like this, and loss of use coverage for the damaged property, but only if the spending can be shown and explained. An adjuster will usually visit or ask for photos and the plumber's report before approving payment. Having all of it ready from day one is what keeps that process to days instead of weeks.
What about flood coverage and the water heater itself
A homeowners policy, even with sewer backup added, does not cover flood. Flood means water coming from outside the house, like rising groundwater, a river, or stormwater pooling against the foundation and seeping in. That's a separate policy, usually through the National Flood Insurance Program or a private flood insurer, and it has its own waiting period before it takes effect. If a leak started because of flooding outside, dwelling coverage won't be the one paying for it, and the sewer backup endorsement won't reach it either, since that only covers water backing up through the drain or sewer line itself.
The water heater or appliance that caused the leak is a separate question from the water damage it caused. If a water heater bursts suddenly, the water damage to the floor and walls is typically covered the same way a burst pipe would be. The water heater itself, the broken unit, usually isn't, because replacing a worn-out appliance is treated as maintenance, not a loss. Some policies add mechanical breakdown coverage as an endorsement, which can cover the appliance itself, but it's not standard. Check the declarations page for that by name if it matters to the case.
Mold cleanup, when it is covered at all, often comes with a sublimit far lower than the rest of the dwelling coverage. A policy might cap mold remediation at a few thousand dollars even when it's paying tens of thousands for the water damage itself, because insurers treat mold as a cleanup cost separate from the structural repair. That sublimit applies whether the mold grew from a covered sudden leak that wasn't dried fast enough or from something else. It's worth checking that number before assuming the whole remediation bill is covered.
If the backed-up drain also brought water in through a window well or a foundation crack after heavy rain, there may be two causes tangled together, sewer backup and flood, and they're covered by different things or not covered at all. An adjuster will usually want to know which water came from which source. Photos taken right away, showing where the water entered and what the yard or street looked like, help sort that out later. Noting the weather and any flooding nearby at the time is also worth writing down while it's fresh.
Before you do anything else
Find your declarations page. Check whether sewer backup coverage is listed by name, and look for the mold remediation sublimit. Those two numbers decide more of this than anything else on the policy.
