How cold does it have to be for pipes to freeze? Info after NC snowstorm
With a winter storm dumping snow across the state, North Carolinians should consider if their pipes may be at risk of freezing.
Whether pipes freeze depends largely on where they’re located and how exposed they are to the cold.
Here’s what to know about protecting them, whether dripping faucets really works and what to do if a pipe freezes anyway.
How cold does it have to be for your pipes to freeze?
Pipes can freeze anytime it’s below 32 degrees, but insulated pipes usually start freezing closer to 20 degrees, according to home improvement website Angi.
If temperatures stay that cold for four to six hours, pipes may burst, Angi says.
Outdoor pipes can freeze in just a few hours around 20 degrees, while indoor pipes may take up to six hours to freeze at that temperature.
How to protect your pipes
You can take these steps to prevent your pipes from freezing, according to Charlotte Water:
- Insulate pipes in unheated areas and seal gaps in crawl spaces or basements.
- Open cabinet doors under sinks to let warm air circulate.
- Disconnect garden hoses and unplug lawn sprinkler systems.
- Know where your main water shut-off valve is in case of a burst pipe.
- Keep cold air out of your water meter.
- Heat tape or heat cables can also help protect exposed pipes
Should you leave your faucet dripping to prevent frozen pipes?
Some experts say leaving faucets dripping doesn’t actually protect pipes and can even cause drains to freeze, according to Forbes.
But others argue it helps relieve pressure and keep water moving. Top of Line Plumbing says dripping works by replacing near-freezing water in exposed pipes with slightly warmer water from underground. The company still recommends prioritizing proper heating and insulation in areas like basements, attics and exterior walls.
Contact a professional to learn the best method for your home.
What should you do if your pipes freeze?
If your pipes freeze, you should take the following steps, according to Charlotte Water:
- Slightly open your faucets.
- Shut off your home’s water supply.
- Raise the heat indoors.
- Warm frozen pipes with hot, wet towels.
- Contact a licensed plumber, or your landlord if you’re a renter.
Does insurance cover frozen pipes?
Home insurance may cover frozen pipes if the freeze is accidental, but if you didn’t properly maintain or insulate your pipes, your claim could be denied, according to the N.C. Department of Insurance.
If you’re unsure about your coverage, the department recommends checking with your insurer for more information.
Portions of this story were previously published in The Charlotte Observer.
This story was originally published January 23, 2026 at 12:10 PM.
