Frozen pipes rarely leak while the ice holds. The water arrives at the thaw, when the split opens and runs through a wall or a ceiling, and Massachusetts winters give any pipe in an exterior wall, an attic or an unheated room that chance.
Why the damage shows late
Ice plugs a crack until temperatures rise, so an owner often finds the leak as a stain, a drip or a rush of water behind drywall. Crews open the cavity at the wet spot, extract what pooled and follow the moisture to learn how far it traveled.
- Shut the main valve and open a faucet to drain pressure.
- Photograph the split and the wet areas before anything is cut.
- Keep heat on in the house while the dry-out runs.
- Save the plumber's invoice for the claim.



