How to Prevent Frozen Pipes in Winter: Complete Homeowner Guide

A burst pipe from freezing can release 2–8 gallons per minute and cause $5,000–$70,000 in water damage. The American Red Cross estimates that pipe freezing is one of the most common and costly disasters homeowners face. The good news: it's almost entirely preventable with the right preparation. Here's everything you need to know before temperatures drop.

Which Pipes Are Most at Risk?

Not all pipes are equally vulnerable to freezing. These are the highest-risk locations in most homes:

• Exterior walls: Pipes running along or through exterior walls have little insulation between them and outdoor cold
• Crawl spaces: Unheated crawl spaces expose pipes to outdoor temperatures directly
• Unheated garages: Any supply lines running through attached or detached garages
• Attics: Supply lines run to attic bathrooms or through attic spaces
• Vacation homes or unoccupied properties: No heating means the whole system is at risk
• Outdoor hose bibs: The most commonly overlooked and easiest to winterize
• Under kitchen sinks on exterior walls: Cabinet doors keep heat out; the wall keeps cold in

9 Proven Ways to Prevent Frozen Pipes

For Vacation Homes and Long Absences

If you're leaving a property unoccupied for an extended period in winter, take these additional steps:

• Shut off the main water supply
• Open all faucets to drain remaining water from pipes
• Flush all toilets and add RV antifreeze to bowls and tanks (not regular antifreeze — it's toxic)
• Keep the heat on at minimum 55°F or use a smart thermostat you can monitor remotely
• Have a neighbor check on the property during extended cold snaps

What to Do If Your Pipes Do Freeze

If you turn on a faucet and get little or no water, especially after a cold night, a pipe may have frozen. Here's the safest approach:

1. Don't panic — but act quickly. A frozen pipe hasn't necessarily burst yet. Your goal is to thaw it before pressure from expanding ice cracks the pipe.
2. Locate the frozen pipe. Check the most vulnerable areas first: exterior walls, under sinks against outside walls, crawl spaces, and unheated areas.
3. Keep the faucet open. Leave the faucet at the end of the frozen pipe open. As the ice melts, water needs somewhere to go, and running water helps the thawing process.
4. Apply gentle heat. Use an electric heating pad wrapped around the pipe, a hair dryer on low heat (never high), or warm towels. Start from the faucet side and work toward the cold wall. Never use an open flame — this has caused house fires.
5. Never use a blowtorch or open flame. Pipe soldering requires careful flame control that is not appropriate for thawing frozen pipes in walls or tight spaces.
6. Check for bursts. Once water flows, check the pipe carefully for bulges, cracks, or any moisture. Even a hairline crack under pressure can become a major leak quickly.
7. Call a plumber if you can't locate the pipe or if it's in a wall, ceiling, or inaccessible area. Professionals have heat tape and infrared tools to locate and thaw pipes without damage.

The Real Cost of Frozen Pipes

Here's why prevention is so clearly worth the effort:

• Pipe insulation for entire crawl space: $200–$500
• Pipe heating cable installation: $100–$300
• Emergency plumber to repair a burst pipe: $500–$2,000
• Water damage remediation (drying, mold prevention): $2,000–$10,000
• Structural repair from severe water damage: $10,000–$70,000

A $300 prevention investment protects against tens of thousands in potential damage. It's one of the best ROI home maintenance decisions you can make before winter.