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Leak guide

Flooded basement? What to do first, and who to call

Safety comes before cleanup in a basement, because water and the electrical panel often share the space. Then the source decides almost everything else: who you call, how you clean up, and which part of your insurance, if any, applies.

Do this now

  1. Stay out of the water until the power is safe. If water could reach outlets, cords, appliances or the electrical panel, switch off power to the basement at the breaker only if you can do it without standing in water. If you can't, stay out and call your utility or an electrician.
  2. Gas appliances that got wet (furnace, water heater, dryer) shouldn't be used until they're checked. If you smell gas, leave the house and call your gas utility from outside.
  3. Stop the source if you can. If it's a pipe, water heater or washing machine, shut the main water valve. If it's the sump pump, check it (below).
  4. Photograph everything before you move or throw anything out, including the water line on the walls.
  5. Get things up and out. Move boxes, rugs and anything porous out of the water. Start removing water with a wet/dry vacuum or a pump once the power is safe.

Where did the water come from?

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Rain or groundwater

Water seeping through wall or floor cracks, around window wells, or up through the floor after heavy rain or snowmelt.

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Sump pump failure

The pit is full and the pump isn't running, often during a storm or a power outage.

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Sewer backup

Dirty water coming up through a floor drain, toilet or shower. Treat it as sewage: keep people and pets out and wear gloves and boots.

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Plumbing or an appliance

A burst pipe, water heater or washing machine. Shut the main valve and see the burst pipe or water heater guide.

If the sump pump stopped

Deep water after a flood

If several feet of water came in from outside and the ground is still saturated, FEMA advises pumping a basement out gradually, about a third of the water a day. Pumping it all at once can let the pressure of the wet soil outside crack or push in the walls.

Do you need a water damage company?

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Call promptly

The basement is finished (drywall, carpet, insulation), the water came from a sewer or floor drain, it's more than an inch or two deep across the floor, or areas are still damp after two days.

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Dry it, then reassess

Clean water, an inch or less, in an unfinished basement. Wet/dry vacuum, fans and a dehumidifier, and keep the space dry for a week while you watch for a musty smell.

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Probably no one

Damp spots on bare concrete after heavy rain that dry within a day. Look at gutters, downspouts and the slope of the ground around the house.

Insurance

A flooded basement can fall under three different kinds of coverage. A burst pipe or failed water heater is commonly treated as sudden water damage. Sump pump failures and sewer backups are often covered only with a separate water backup endorsement. Surface water and groundwater from outside are flood, which standard homeowners policies exclude and flood insurance covers. Photograph the source and the damage, keep receipts, and call your insurer early. They make the coverage decision.

Not sure what you're dealing with? Ask the advisor and describe the water and where it came from.

Frequently asked

Who do I call for a flooded basement?

It depends on the source. A plumber for a pipe, water heater or washing machine; a plumber or sump pump installer for a failed sump pump; and a water damage company if the basement is finished, the water is sewage, or it's more than an inch or two deep. If the power or gas may be affected, call your utility first.

Is it safe to walk in a flooded basement?

Not until you know the power is off or the water can't reach outlets, cords, appliances or the panel. If you can't switch off the basement's breaker without standing in water, stay out and call your utility or an electrician.

Why did my sump pump fail?

The common causes are lost power (an outage, a tripped GFCI or breaker), a stuck float switch, a frozen or clogged discharge line, or a worn-out pump. A battery backup and a high-water alarm cover the power-outage case.

Does homeowners insurance cover a flooded basement?

It depends on where the water came from. Sudden plumbing failures are commonly covered; sump pump failures and sewer backups often need a water backup endorsement; and flooding from outside water needs flood insurance. Your insurer decides.

Water spread into walls, ceilings or floors?

Talk to an independent water damage specialist. No obligation, and they can tell you if you need them at all.

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