A burst pipe is one of the most expensive ordinary disasters in a home. Prevention costs almost nothing and takes one afternoon.
Why a small freeze becomes a huge bill
Water expands as it freezes, and inside a sealed pipe that expansion builds pressure until something splits. The flood usually starts during the thaw, often inside a wall, and water damage claims from burst pipes routinely run into five figures. The entire prevention program costs under 50 dollars and one afternoon.
Find your risk pipes
Cold reaches pipes in predictable places: along exterior walls, especially kitchen and bathroom sinks on outside walls, in unheated crawl spaces, garages, basements, and attics, and at outdoor spigots. Walk the house once and list them. While you are at it, locate the main water shutoff valve and make sure every adult can find and turn it in the dark; in a burst, that valve is the difference between a mess and a catastrophe.
The prevention playbook
Before winter: slip foam pipe insulation, a few dollars per stick, over exposed runs in unheated spaces; disconnect garden hoses and drain or cover exterior spigots; and seal drafts near pipes with caulk or foam. During hard cold snaps, roughly 20 degrees and below: let vulnerable faucets drip a pencil lead stream, moving water resists freezing, open cabinet doors under sinks on exterior walls so room heat reaches the plumbing, and keep the thermostat no lower than 55, day and night. Leaving town in winter? Keep heat on, and for long absences consider shutting the main and draining the lines.
If a pipe freezes anyway
No water at one faucet in a cold snap means a freeze somewhere on that line. Open the faucet, then warm the suspect pipe gradually, hair dryer, heating pad, towels soaked in hot water, starting at the faucet end. Never use a torch or open flame. If you find a split or cannot locate the blockage, shut the main and call a plumber. One afternoon of foam and caulk in November beats that phone call every time.
Frequently asked questions
At what temperature should I start worrying?
Risk climbs sharply when outdoor temperatures fall to around 20 degrees Fahrenheit or below, especially with wind, and for pipes in unheated spaces even sooner.
How do I safely thaw a frozen pipe?
Keep the faucet open, warm the pipe gradually with a hair dryer or heating pad working from the faucet toward the blockage, and never use an open flame. If you cannot locate or reach it, call a plumber.
