How do you know a pipe is frozen?
The classic sign is a faucet that gives a trickle or nothing at all in very cold weather. You may see frost on exposed pipes, notice a bulge or crack, or hear unusual sounds. Pipes in unheated spaces such as crawl spaces, outside walls, barns, pump houses and garages are at the highest risk.
A frozen pipe is not yet a burst pipe, but when the ice thaws, a split can start to leak. Treat every frozen pipe as a possible leak.
Cold snaps are hardest on older homes and outbuildings, where lines run along exterior walls and through spaces nobody heats. If a fixture froze once, it will likely freeze again, so mark that spot and fix the exposure.
- No water or a weak trickle in cold weather
- Frost on pipes
- Strange noises or bulges
- Damp spots or dripping once ice melts
What should you do first?
Open the faucet served by the frozen pipe, so melting water can run out. Find your main water shutoff and make sure everyone in the home knows where it is. If you see a split or leak, shut off the water at once and turn off electricity to any wet area if you can do so safely.
If water is near electrical outlets, panels or appliances, stay away and call an electrician or the power company. Your safety is more important than your belongings.
How can you thaw a pipe safely?
Gentle heat is the safe approach. Warm air from a hair dryer, a heating pad or warm towels can help, applied slowly, working from the faucet toward the frozen area. Never use an open flame, a torch or a device that could start a fire. Fires from thawing attempts are a known danger.
If you cannot find the frozen spot, cannot reach it or are unsure, call a licensed plumber. Pipes inside walls and under floors may need a professional.
- Use gentle, indirect heat
- Keep the faucet open while thawing
- Never use open flames
- Stop and call a plumber if you cannot reach it
What if a pipe bursts?
Shut off the main water at once. Open faucets to drain the lines. Move valuables and electronics away from the water, and take photos of the damage for your records. Call a plumber and then your insurance company.
Wet building materials can grow mold and weaken structures. The CDC and your county health department can tell you how to deal with water damage and mold. Do not enter a flooded area if electricity is on.
Insurance policies differ on water damage, so ask your agent what is covered and what steps the policy expects you to take, such as stopping the leak quickly and documenting losses.
How do you keep water and people safe while repairs happen?
Without running water, use stored or bottled water for drinking and hygiene. If you are in a well-fed home, remember that the pump may still run and push water through a broken pipe, so shut it off at the breaker if you are sure it is safe.
If the cold makes the house unsafe, go to a relative or a shelter. Check on older neighbors, who may not be able to cope on their own.
Write down the time the water was shut off, so you can tell a plumber and your insurer how long water ran.
How do you prevent frozen pipes in future?
Prevention starts before winter. Insulate exposed pipes, seal gaps that let cold air into crawl spaces and walls, disconnect and drain outdoor hoses and make sure outbuildings with water lines are protected. In extreme cold, keep cabinet doors open under sinks and let faucets drip, if your local advice says to.
Heat tape and other devices should be installed and used strictly as the maker directs, since they can start fires. Ask a licensed professional for advice. Check your pump house and any stock waterers too.
- Insulate and seal before cold weather
- Drain outdoor lines
- Protect pump houses and barns
- Know the main shutoff location
- Ask a plumber about heating cable use
What if you are away or the power is out?
A house with no heat is a house where pipes freeze. If you leave for winter, ask a professional how to prepare the plumbing. If power fails, follow your plan for keeping warm, and think about whether draining the system is the right step. Ask a plumber in advance, since the answer depends on your system.
Share a key and a contact with a trusted neighbor who can check on the place.
Key takeaways
- Open the faucet, find the shutoff and thaw gently, never with flame.
- If a pipe bursts, shut off the water and stay away from electricity near wet areas.
- Call a licensed plumber when you cannot reach or find the frozen spot.
- Insulate and plan before winter.
Sources and further reading
Last reviewed: November 12, 2026. Written by the Rural Farm Life Editorial Team. See our editorial policy.