Frozen Pipe Bursts in Utah Winters: Prevention & First Response
Why Utah pipes freeze and burst, which ones go first, how to prevent it before a cold snap, and exactly what to do when one lets go.
A frozen pipe bursts because water expands as it freezes, and that pressure splits the pipe — but the flood usually doesn't arrive until the ice thaws and water pours out of the crack. In Utah, the pipes most likely to freeze run through exterior walls, unheated basements and garages, and crawlspaces, and the risk spikes on the benches and foothills where subzero canyon air settles overnight.
Why the break and the flood happen at different times
Ice plugs the pipe, and the split often stays sealed by that same ice. When temperatures climb and the plug melts, full house pressure pushes through the break — which is why so many frozen-pipe floods are discovered during the first warm afternoon after a cold snap, sometimes while no one is home.
Which pipes freeze first
- Supply lines in exterior walls and unheated spaces
- Hose bibs and outdoor faucets left connected to hoses
- Pipes in garages, crawlspaces, and against uninsulated rim joists
- Vacant-home or basement-apartment lines where the heat is turned down
Prevent it before the cold snap
- Disconnect garden hoses and shut off or drain exterior faucets in fall
- Insulate exposed pipes in crawlspaces, garages, and exterior walls
- Keep the house at a steady temperature — don't deeply set back the thermostat during a hard freeze
- Open cabinet doors under sinks on exterior walls so warm air reaches the pipes
During a hard freeze
On the coldest nights, let a faucet served by vulnerable piping run a slow trickle — moving water resists freezing, and an open faucet relieves the pressure that actually causes the burst.
If a pipe already burst
Shut off the main, kill power to wet areas, and start documenting — the full playbook is in the first 30 minutes after you find water damage. Then call a 24/7 water damage crew. A frozen-pipe burst is usually a covered, sudden loss when you've kept the home heated — see what Utah insurance covers.
Keystone answers (801) 948-2501 around the clock and reaches most Wasatch Front homes within 45 minutes — including the foothill neighborhoods in Sandy, Draper, and Cottonwood Heights that get the hardest freezes.
Questions about your specific situation? Talk to us — advice is free, 24/7.