When winter temperatures plummet, frozen pipes become one of the most common and costly plumbing emergencies homeowners face. A single burst pipe can release hundreds of gallons of water per hour, causing thousands of dollars in damage to walls, floors, and personal belongings. According to the American Red Cross, frozen pipes are a leading cause of property damage during cold weather months. The good news is that most frozen pipe incidents are entirely preventable with the right preparation and knowledge.
Why Pipes Freeze
Pipes freeze when the water inside them drops below 32°F (0°C) and turns to ice. As water freezes, it expands by roughly 9%, creating enormous pressure inside the pipe. This pressure builds between the ice blockage and the closed faucet, eventually causing the pipe to split or burst. Pipes most vulnerable to freezing include those in unheated interior spaces like basements, crawl spaces, attics, and garages, as well as exterior walls and pipes with minimal or no insulation.
Essential Prevention Strategies
1. Insulate Exposed Pipes
Pipe insulation is your first and most effective line of defense against freezing temperatures. Foam pipe insulation sleeves are inexpensive and easy to install, even for homeowners with no plumbing experience. Focus on pipes in the most vulnerable areas of your home:
- Basements and crawl spaces
- Attics and garages
- Pipes running along exterior walls
- Under kitchen and bathroom sinks on outside walls
- Hose bibs and outdoor water lines
For maximum protection, the This Old House guide to pipe insulation recommends using thick foam or fiberglass sleeves rather than thin wrap-style tape for better thermal resistance. Pay special attention to joints and elbows, where heat loss is greatest.
2. Install Heat Tape or Heat Cable
For pipes in extremely cold areas where insulation alone may not be enough, heat tape or thermostatically controlled heat cable provides active protection. These products wrap around pipes and generate warmth when temperatures drop below a set threshold. When installing heat tape, always follow the manufacturer's instructions carefully. Never overlap heat tape on itself, and never use it on insulated pipes unless the product is specifically rated for that use. If your pipe repair needs include replacing sections in cold areas, this is the perfect time to add heat cable protection.
3. Let Faucets Drip
When temperatures are forecast to drop well below freezing, allowing a slow drip from faucets served by exposed pipes can prevent freezing. Moving water is harder to freeze than still water, and the dripping relieves pressure buildup behind any ice that does form. Focus on faucets on exterior walls, and let both hot and cold lines drip slightly overnight when temperatures are at their lowest.
4. Open Cabinet Doors
Pipes under kitchen and bathroom sinks are often located against exterior walls, where cold air penetrates. During extreme cold snaps, open cabinet doors to allow warm indoor air to circulate around these pipes. This simple step costs nothing and can make the difference between pipes that survive and pipes that burst. If you have small children or pets, remember to move any hazardous household chemicals stored under sinks to a safer location first.
5. Maintain Consistent Thermostat Settings
One of the most important preventive measures is keeping your thermostat set to a consistent temperature both day and night. The American Red Cross recommends maintaining a minimum indoor temperature of 55°F (13°C), even when you are away from home. If you are going on vacation during winter, do not turn the heat off entirely. The cost of keeping your home warm while away is far less than the cost of repairing water damage from a burst pipe.
Additional Winter Protection Tips
- Disconnect all outdoor hoses and drain outdoor faucets before the first freeze
- Install insulated faucet covers on outdoor hose bibs
- Seal air leaks around pipes where they enter your home using caulk or spray foam
- Close garage doors to protect water lines running through the garage
- Add extra insulation to attics, basements, and crawl spaces to keep these areas warmer
- If you have a sprinkler system, drain it and shut off the water supply before winter
What to Do If Your Pipes Freeze
Despite your best efforts, pipes can still freeze during extreme cold. If you turn on a faucet and only a trickle comes out, suspect a frozen pipe. Act quickly but carefully:
- Keep the faucet open so melting water can flow through the pipe
- Apply heat to the frozen section using a hair dryer, heating pad, or towels soaked in hot water
- Never use an open flame, blowtorch, or space heater directly on pipes
- Work from the faucet back toward the frozen blockage
- Continue applying heat until full water pressure is restored
If a pipe has burst or you cannot locate the frozen section, it is time to call a professional. Our guide on what to do during a plumbing emergency provides step-by-step instructions for minimizing damage while you wait for help.
Signs Your Pipes May Already Be Damaged
Frozen pipes don't always burst immediately. After a freeze event, watch for these warning signs that indicate your pipes may have been compromised:
- Reduced water pressure that does not fully return after thawing
- Frost visible on exposed pipe surfaces
- Strange smells from faucets or drains
- Water discoloration or sediment after thawing
- Damp spots on walls, ceilings, or floors
If you notice any of these signs, learn more about the warning signs you need pipe repair before small problems become major emergencies.
Key Takeaways
- Insulate all exposed pipes, especially those in unheated spaces and along exterior walls
- Use heat tape for pipes in extremely cold areas where insulation alone is not sufficient
- Let faucets drip during extreme cold to relieve pressure and keep water moving
- Open cabinet doors to allow warm air to reach pipes under sinks on exterior walls
- Keep your thermostat at 55°F or higher, even when away from home
- If pipes freeze, thaw them gently with a hair dryer or heating pad—never with an open flame
- Call a professional immediately if a pipe bursts or you cannot locate the frozen section
Need Help With Frozen or Burst Pipes?
Don't wait until a small freeze becomes a major flood. If your pipes are frozen, leaking, or have already burst, the licensed professionals at GoPlumberz are ready to help 24/7. We connect homeowners with experienced plumbers who can handle everything from preventive insulation to emergency pipe repair. Call (888)239-9523 now for fast, reliable plumbing service in your area.