Why Pipes Burst During Winter

A common misconception is that expanding ice itself cracks a pipe. In most cases, the actual break happens between the ice blockage and a closed faucet, where trapped water pressure builds until the pipe wall gives way.

Which pipes are most at risk

• Pipes running through unheated basements or crawl spaces
• Pipes in exterior walls with insufficient insulation
• Pipes near foundation vents or drafty areas
• Outdoor spigots and the pipes feeding them
• Pipes in unheated additions, garages, or vacant units

Prevention that actually works

Insulating exposed pipe sections, sealing drafts near pipe runs, and keeping a trickle of water flowing during extreme cold snaps are the most effective preventive steps. Homes with a history of freezing in the same spot usually need permanent insulation or heat tape rather than a repeated seasonal workaround.

If a pipe does freeze, never use an open flame to thaw it. Shut off the water main if you suspect a burst, and call for emergency service right away — the faster a frozen section is addressed, the better the odds of avoiding a full break.