Frozen & Burst Pipe Water Damage
The classic Minnesota water emergency. A burst supply line can release hundreds of gallons before anyone notices.
Why Winter Pipes Burst
Water expands as it freezes. In a January cold snap, pipes in exterior walls, rim joists, attics, and unheated spaces can freeze solid — and the pressure splits the pipe or a fitting. The flood often starts at thaw, when the ice plug melts and the split opens up. Ice dams do slower damage: melting roof snow refreezes at the eaves, backs up under shingles, and drips into ceilings and walls for weeks.
Prevention That Actually Works
Drip the faucets
In deep cold, a pencil-thin stream on vulnerable lines keeps water moving and relieves pressure.
Open cabinet doors
Sink plumbing on exterior walls needs the room’s heat. Open the doors during cold snaps.
Heat at 55°F+ when away
A winter getaway with the thermostat too low is how many bursts happen. Keep heat on and ask someone to check in.
Insulate the weak points
Rim joists, crawl spaces, and attic penetrations are the usual freeze points. Insulate and air-seal them.
If a Pipe Has Burst
- Shut the main valve — Know where it is before you need it. Shutting it stops the flood immediately.
- Open the lowest faucet — Draining the lines reduces how much more water comes out of the break.
- Call for extraction and drying — Burst-pipe water spreads through floors and wall cavities fast. Call 507-243-0773.