January in Fitchburg averages a high near 35 degrees F and a low near 17, so a pipe in an exterior wall, an attic run or an unheated room spends long stretches below freezing. The split often shows up only when the ice melts.
What happens when the ice lets go
Ice blocks the pipe and hides the damage until the thaw sends pressure and water through the crack. By then the supply may have run into insulation, a ceiling below or a floor cavity. The crew closes the valve, extracts the surface water and traces the wet path with a moisture meter and a thermal camera.
- Moisture meters follow the water from the split to its farthest wet stud bay
- Insulation that soaked up the thaw comes out because it holds water
- Small cuts open the cavity so air movers can reach the framing
- A ceiling below gets checked before a stain appears



