Frozen pipes burst without warning and the damage happens fast. The average frozen pipe burst repair costs $500-$5,000, and if water damage restoration is involved, that number can jump to $7,000 or more. About 250,000 homes deal with this every winter. Most of those cases were preventable.

The Quick Answer

Here's what frozen pipes cost at each stage:

Thawing only (no burst): $350-$750 for a plumber
Burst pipe repair with minor damage: $750-$1,500
Burst pipe with water damage restoration: $1,500-$7,000+
Prevention (insulation + heat tape): $300-$800

Prevention is 4-10x cheaper than repairs. If you're in a cold climate and you haven't winterized your pipes, this guide covers everything you need to do before the temperature drops.

Which Pipes Are at Risk

Not all pipes freeze at the same rate. The highest-risk pipes are the ones closest to the exterior of the house with little insulation between them and freezing air.

Pipes in exterior walls -- especially in bathrooms or kitchens on the outside wall of the house
Pipes in crawl spaces -- these are often completely uninsulated and exposed to outdoor air
Pipes in unheated garages -- if you have a hose bib or utility sink in the garage, those are vulnerable
Outdoor hose bibs and irrigation lines -- always need to be winterized before the first hard freeze
Pipes near exterior doors -- especially in vacation homes where the heat gets turned way down

Pipes freeze when air temperature around them drops to 20°F or below. But wind chill can drop the effective temperature much lower, meaning pipes near drafts or air leaks can freeze even when it's above 20°F outside.

How to Prevent Frozen Pipes

Insulate Exposed Pipes

Foam pipe insulation sleeves are the easiest and cheapest fix. They're sold at any hardware store for $0.50-$2 per linear foot. Cut them to length, wrap them around exposed pipes in crawl spaces, basements, and garage walls, and secure with tape.

Focus on any pipe that runs within 6 inches of an exterior wall or sits in an unheated space. This single step eliminates most freeze risk for most homeowners.

Install Heat Tape on Problem Pipes

Heat tape is electric cable that wraps around a pipe and keeps it above freezing temperature. It's the right solution for pipes that are difficult to insulate or in extremely cold areas.

Cost: $30-$80 for a standard residential run. Plug it in before the first freeze, unplug it in spring. Self-regulating versions turn on automatically when temperatures drop -- those are the safest option.

Do not use heat tape on plastic PVC pipes unless the product is specifically rated for it. Some heat tapes run hot enough to damage plastic.

Seal Air Leaks Near Pipes

Cold air infiltration is often the real culprit in pipe freezes. Check around where pipes enter the house through exterior walls -- those gaps let in sub-freezing air and expose the pipe to temperatures far colder than the room itself.

Use foam sealant or caulk to close gaps around pipe penetrations. A $5 can of expanding foam can protect a pipe better than $50 worth of insulation if the cold air source is eliminated.

Leave Cabinet Doors Open Under Sinks

Bathroom and kitchen sink cabinets on exterior walls trap cold air. On frigid nights, leave those cabinet doors open so warm house air can circulate around the pipes. This is free and works well as a short-term fix during cold snaps.

Let Faucets Drip During Extreme Cold

Moving water doesn't freeze as easily as standing water. During cold snaps below 20°F, let the faucets on exterior walls drip slowly -- just a trickle is enough. This is a last resort for pipes you can't insulate, not a substitute for proper insulation.

Winterize Outdoor Hose Bibs

Outdoor hose bibs should be shut off at the interior shutoff valve and drained every fall before the first freeze. If you don't have an interior shutoff, a frost-free hose bib is a $15-$30 hardware replacement that handles it automatically.

This one's easy to forget. A burst outdoor hose bib can pump water into the wall behind it before you even realize what happened.

What to Do if Pipes Freeze

If you turn on a faucet and nothing comes out during cold weather, you've got a frozen pipe. Act fast -- a frozen pipe can burst within minutes of thawing if it's under pressure.

Turn off the main water shutoff. If the pipe is going to burst when it thaws, you want the water off first. Find your main shutoff before winter every year -- not when water is already spraying.
Open the faucet. Opening the faucet relieves pressure as the ice melts and tells you when thawing is complete.
Apply heat to the frozen section. Use a hair dryer, electric heating pad, or warm towels. Start at the faucet end and work back toward the coldest section. Never use open flame -- propane torches are a fire hazard and can cause pipes to burst from rapid thermal expansion.
Check for cracks after thawing. Look for drips, wet spots, or spraying water as you slowly turn the main water back on. A pipe that's been frozen may have cracked even without fully bursting.
Call a plumber if you can't locate the frozen section or if thawing doesn't restore flow within 20-30 minutes. Pipes in exterior walls or under concrete aren't DIY-accessible.

If the Pipe Bursts

Turn off the main water immediately. Then call a plumber. Burst pipe repair typically runs $750-$1,500 for the pipe itself, but water damage restoration -- drywall, flooring, mold remediation -- is where costs explode. Water damage restoration averages $1,500-$7,000+ depending on how long the water ran and what it got into.

One burst pipe that runs for an hour while you're at work can cause tens of thousands in structural damage. This is why the main shutoff location matters -- in a burst scenario, every minute counts.

Bottom Line

Frozen pipes are one of the most expensive winter surprises a homeowner can deal with. The good news is that 30 minutes of fall prep -- insulating exposed pipes, sealing air gaps, winterizing hose bibs -- eliminates the risk for most houses. Prevention costs $300-$800. Repairs cost up to $7,000+. The math is obvious.

If you're a plumber, pre-winter pipe insulation calls are an easy sell right now. Try QuoteSnap for free to set up instant pricing on your website so homeowners can book winterization services before the cold hits.

Frozen Pipe Prevention and Thawing: Winter Plumbing Emergency Guide (2026)