How Frozen Weather Damage Water Lines 
Every winter I get this call, the water was fine at bedtime, it became a trickle by breakfast, and nothing by the time the coffee’s done. Nothing’s leaking, which is what usually fools people. In Newark, DE, one night of frozen weather can lock a line solid without leaving a single drip, and the real trouble waits for the thaw.
What the Ice Is Actually Doing
The ice isn’t the villain, that’s just nature. The trapped water is. As the freeze creeps along the pipe, it squeezes the remaining liquid toward a closed faucet, pressure spikes, and the weakest joint quits, often several feet from the ice. I’ve opened a wall expecting a split at the frozen spot and found it at an elbow six feet downstream.
Pipe material changes everything. PEX has some give to it and often survives a single freeze. Copper usually doesn’t. And frozen weather doesn’t need a week to do this. One long night below freezing can be plenty, especially with wind hitting an exterior wall.
Where I’d Look First
Start in the garage, because any supply line on that outside wall is a suspect. Then the crawl space or basement corner nearest the street, where the water service comes in. Then the kitchen sink, if its cabinet sits on an exterior wall. That cabinet is basically a cold box.
Older Newark houses with a room added decades back are repeat offenders, since somebody ran the plumbing the cheap way along the outside wall. Finished basements fool people too. The line sits behind drywall against cold concrete, and nobody’s looked at it in twenty years. Your thermostat can’t tell you what’s happening inside a wall, and frozen weather finds every cold spot in there.
If It’s Frozen Right Now
If frozen weather has your water stuck, shut off the main when you suspect a crack. Then open the faucet so melting water has somewhere to go.
Leave the torch in the garage. I’ve seen one turn a frozen pipe into a house fire, and a heat gun held too long will scorch the wall behind it. A hair dryer on low works on exposed pipe if you’ve got 20 to 40 minutes. If the pipe’s behind drywall, or you can’t tell where it’s frozen, stop there and call a plumber. Ice can hold a crack shut, so the damage stays hidden until the thaw, then shows up all at once.
When I’d Talk You Out of Replacing It
In most cases freeze splits are a repair. One crack in an otherwise healthy line is an afternoon’s work. But old galvanized steel, or a line that’s been patched three times, is where I start talking about water line replacement. Patching it again just buys you until the next stretch of frozen weather.
Sometimes only one section needs to go, and I’d rather tell you that than sell you a full swap. When the whole run does need replacing, it usually takes one to two days, longer if we’re digging through frozen ground. If the city wants a permit, we’ll tell you up front.
Don’t Wait for the Thaw
Some folks figure the ice will sort itself out, leave for work, and come home to water running down the ceiling. Others borrow a neighbor’s torch. Either way, you’re buying drywall on top of plumbing. If your water’s slow or gone don’t wait. You call. We come. It’s fixed.
Quick Answers To Common Questions
My pipe froze but it’s working now. Am I good?
Not necessarily. A thawed pipe can hold a hairline crack that only leaks under pressure. Watch the ceiling and the cabinets near it for a day or two, and call us if anything feels damp.
Can I just leave the faucet dripping all night?
Yes. Use the faucet farthest from where water enters the house, and a pencil-lead stream is plenty. It helps, but it’s no guarantee, especially on a line running through a bare crawl space.
How cold does it have to get before pipes freeze?
Depends on the pipe. A bare line in an exterior wall can freeze after several hours below freezing, and wind makes it worse. Newark gets plenty of nights like that every winter.
Can frozen weather crack a pipe without it bursting?
It can. You get a hairline split or a loose joint that weeps for weeks, and the first clue is a water bill that doesn’t match how you live. After frozen weather passes, check the exposed lines even if everything seems normal.
How long does a frozen pipe repair take?
Exposed pipe is usually 45 minutes to two hours. Hidden lines run longer because we have to find the split first. If the line’s old and keeps failing, we’ll talk water line replacement.
Find your main shutoff tonight, while the floor’s dry.
