Frozen pipes in Charlotte: it happens more than you think
Every time Charlotte gets a proper cold snap, my phone fills up with the same call: a pipe froze, then split, and now there is water under the house or inside a wall. People think frozen pipes are a northern problem. Around here they are a surprise problem, and surprise is exactly what makes them expensive.
Why Charlotte homes are vulnerable
Northern homes are built for cold, with pipes routed through heated space. Charlotte homes are built for summer. Supply lines hang exposed under pier-and-beam houses, run through unheated crawl spaces, and feed hose bibs that never get disconnected. When a January night drops into the teens, those are the pipes that freeze first, and the house was never designed to protect them.
Why a frozen pipe bursts
Water expands when it freezes. When it freezes inside a pipe, pressure builds between the ice plug and a closed faucet until the pipe wall gives. The split often is not where the ice is, it is downstream where the pressure has nowhere to go. That is why a pipe can look fine while frozen and then gush the moment it thaws.
Cheap prevention that works
- Disconnect and drain garden hoses before the first hard freeze. A connected hose traps water in the bib and splits the pipe inside the wall.
- Wrap exposed crawl space pipes with foam sleeves from any hardware store. This is the single highest-value hour of maintenance a Charlotte crawl space home can get.
- On nights in the teens, let a faucet on an exterior wall drip. Moving water is much harder to freeze.
- If you travel in winter, leave the heat no lower than 55 and open cabinet doors under sinks on exterior walls.
If a pipe already froze
If you turn on a faucet during a cold snap and get a trickle, you likely have a freeze forming. Open the faucet, find the frozen section if you can, and warm it gently with a hair dryer. Never use an open flame. If you cannot find it or a pipe has already burst, shut off your main valve and call for emergency help. Catching a freeze before it splits the pipe is the difference between no cost and a four-figure repair.