A frozen pipe often does no harm until it thaws, and then it can leak quietly behind plaster or drywall before anyone sees a stain. Crews in Harvard treat dampness near an exterior wall as a leak to trace, not a spot to paint over.
Cold-weather outages and split pipes
Ice storms struck in December 2008 and on January 24, 2023, and a 2018 snowstorm brought record-low temperatures. A house that loses heat through a long outage can ice up a pipe in an outside wall, and the damage appears only when heat returns and the ice melts.
- The main valve is closed to stop the flow
- Meters and thermal imaging locate the wet cavity
- A wall or ceiling opens where readings stay high
- Insulation that holds water is removed



