Frozen pipe burst in Charlotte: what to do in the first hour

Last Updated: October 29, 2026

When a frozen pipe has burst in Charlotte, what you do in the first hour matters more than anything that happens later: every minute the main stays open, the split keeps feeding water into floors, walls and ceilings. Level Repiping Charlotte replaces worn and freeze-exposed supply piping in houses across the Charlotte area, but the steps below come before any repair or repipe, and you can take them yourself. Work in this order.

Close the main shutoff first

Shut off the water to the whole house before you mop, move furniture or call anyone. A split pipe under street pressure can move a lot of water quickly, and nothing else you do helps while it runs.

Where the main shutoff sits depends on the house. In a crawl space house it is often near the point where the line from the meter enters, either in the crawl space or on a valve just inside the front wall. In a slab house it is often in the garage, a utility closet or near the water heater. If you cannot find it or it will not turn, the valve on the house side of the meter, in the meter box near the street, closes the supply to the whole house. Charlotte Water lists that shutoff valve, the line from the meter to the house and all of the plumbing inside as the owner’s.

Once the main is closed, open the lowest faucet in the house, such as a first-floor tub or an outdoor hose bib, and one faucet upstairs. That drains the water still in the lines and takes the pressure off the split. Leave the main closed until the damaged section is repaired; turning it back on to see where the leak is only adds water to the house.

Turn off the water heater

With the cold supply closed, a tank water heater keeps heating whatever is inside it. If the split is on the hot side, or you are draining lines and the tank could lose water, turn the heater off: the breaker for an electric heater, or the pilot or vacation setting on a gas heater’s control. An electric element that runs in a tank that has partly drained can burn out, and that becomes a second repair. Turn the heater back on only after the water is back on and the tank is full, which you can tell when a hot faucet runs steadily with no spitting air.

Keep electricity and water apart

Water from a burst line travels along framing and through ceilings, and it finds light fixtures, outlets and appliances on the way. If water is coming through a ceiling light or running near outlets, turn that circuit off at the panel, but only if you can reach the panel standing on dry floor. If the panel itself is wet, or you would have to stand in water to reach it, stay away from it and call the power company. Keep people out of rooms where cords or appliances sit in water, and out from under any ceiling that is bulging or sagging with water above it.

Charlotte Water’s role ends at the meter

Charlotte Water maintains the main, the meter and the line from the main to the meter. A split anywhere on the house side of the meter, whether in the yard, the crawl space or a wall, is the owner’s to repair with a plumber. Our guide to who owns the water line in Charlotte explains the split in detail, and a break underground between the meter and the house is a water line replacement question rather than an interior one.

The water that ran through the meter will show on the bill. Charlotte Water says private plumbing leaks are the leading cause of high bills, and that after a private leak is repaired it has resources to help with the outstanding balance. Keep the repair invoice so you can show the leak was fixed.

Record the damage before cleanup

Photograph the split, the wet floors and ceilings, and anything damaged, before you start moving things. Note when you found the leak and when the water was shut off. Then start drying: move belongings out of wet areas, open cabinet doors and run fans.

Homeowners insurance usually treats sudden water damage differently from the replacement of old pipe, and each insurer sets its own terms. The photos and the timeline help with either conversation. Our repiping and insurance guide covers what insurers ask about older piping.

Where Charlotte pipes freeze

Most freezing nights in Charlotte pass without damage. NOAA’s 1991-2020 normals for Charlotte Douglas airport count about 58 nights a year at or below 32°F, but only about 7 at or below 20°F. Burst pipes come with the rarer hard freezes, when the temperature falls into the teens or single digits and the daytime high barely recovers. The airport recorded 6°F on January 7, 2014, 9°F on December 24, 2022, when the high that day reached only 29°F, and 10°F on February 2, 2026.

Water expands as it freezes. In a pipe, the ice plug pushes against the water trapped between it and a closed faucet, and the pipe splits where that pressure builds, often away from the ice itself. That is why a burst can appear in a wall or at a fixture connection even though the coldest part of the run is in the crawl space.

Mecklenburg County assessor records show that about 94% of single-family homes built in the 1950s and 95% of those built in the 1960s sit on crawl spaces, while 71% of those built in the 2000s sit on slabs. In older houses the exposed runs are usually under the floor. In slab houses that have been repiped or rerouted, they are usually overhead. Our guide to crawl space pipes freezing goes into each case.

What the code says about pipe in cold spaces

North Carolina’s plumbing code amendment 305.4, in effect since January 1, 2021, says water pipe in an exterior wall goes on the heated side of the insulation, and water pipe in an unconditioned attic, crawl space or other space subject to freezing needs at least R-6.5 insulation, heat, or both. Pipe installed before that rule may have little or no insulation. Any new pipe in those spaces, whether from a repair or a repipe, is installed to the current rule.

Repair, or something bigger?

A single split on pipe that is otherwise sound is a repair: the damaged section is cut out, new pipe is spliced in, and the line is tested before the water comes back on. Our pipe repair page covers that scope. A split can also leak only once the water is back on and the line is under pressure again, so watch ceilings and the crawl space for a day or two after the thaw. If the meter keeps moving with every fixture off, the water leak detection page explains how a hidden leak is found.

A burst says more when the pipe behind it is already near the end of its life. Gray polybutylene, rusted galvanized steel or a run that has frozen before points to the route or the material, not just one bad night. Replacing that run and moving it to a warmer path with code insulation can be part of a partial repipe, and a house with the same old pipe throughout is a whole house repipe conversation. If you are not sure what you have, the guide to identifying pipe material helps.

New material alone does not remove the exposure. PEX tolerates a freeze better than rigid pipe because the tubing can stretch a little as ice forms, but it is not freeze-proof: fittings, valves and fixture connections can still split, and PEX in an uninsulated crawl space still needs the insulation the code requires. The PEX repipe page explains where it fits and where it needs care.

Before the next hard freeze

Find the main shutoff now and tag it, and make sure everyone in the house knows where it is. Disconnect garden hoses. Look at the lines in the crawl space or attic for missing or slipped insulation. When a hard freeze is forecast, open cabinet doors under sinks on exterior walls and let a faucet at the far end of the coldest run drip overnight.

If the freeze exposed old pipe you would rather replace than keep repairing, call (704) 452-4386 or send the details through the contact page, and the scope for your house can be written once the water is back on.