Winter Plumbing · La Vergne Blog

How to Prevent Frozen Pipes in Tennessee

Short answer: insulate pipes in crawlspaces and exterior walls, drip faucets on the coldest nights, open cabinet doors under sinks, and know your main shutoff before you need it. Most burst pipes here happen in crawlspaces.

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Plumber insulating exposed pipes with foam sleeves in a La Vergne crawlspace during winter prep

Tennessee winters are mild until they are not. La Vergne cold snaps drop into the 20s and teens, sometimes for days, and that is enough to freeze pipes in crawlspaces, garages, and exterior walls. A frozen pipe is an inconvenience; a burst pipe flooding a floor is an emergency. The prevention steps below are the same ones we give our own customers every fall.

Many La Vergne homes have plumbing running through vented crawlspaces or along outside walls, and slab homes have lines in attics and garages that see real cold. Our emergency plumber calls spike during every hard freeze, and nearly all of them trace back to one uninsulated run.

Before the Cold Snap

Insulate exposed pipes. Foam sleeves on crawlspace, garage, and attic runs are cheap and permanent. Pay special attention to elbows and the sections nearest crawlspace vents.
Seal crawlspace vents and gaps where practical. Wind blowing across a pipe freezes it far faster than still cold air.
Disconnect garden hoses and shut off hose bibs. A hose left connected traps water in the bib and the pipe behind the wall.
Find your main shutoff and test it. You should know exactly where it is and confirm it turns. During a burst, minutes of searching become gallons of water indoors.
Check vacant-home and rental situations. If a house will sit empty during a freeze, keep the heat on and consider shutting off and draining the water.

During a Freeze: The Night-Of Routine

When the forecast drops into the low 20s or below, let faucets on exterior walls drip slowly, about a pencil-lead stream. Moving water resists freezing, and the drip relieves pressure if ice does form. Open the cabinet doors under kitchen and bathroom sinks on outside walls so warm room air reaches the pipes. Keep the thermostat at a consistent temperature overnight rather than letting the house cool deeply. If you have a history of one problem pipe, that fixture gets the drip first.

If a Pipe Freezes or Bursts

Situation	First move	What not to do
One faucet gives no water, others fine	Open the faucet, warm the pipe run gently with a hair dryer or space heater nearby	Never use an open flame or torch on a pipe
No water anywhere in the house	Check the main line area and crawlspace; call us if the freeze point is not obvious	Do not force fixtures; pressure builds behind ice
Pipe has burst or is spraying	Close the main shutoff immediately, then open faucets to drain, then call	Do not wait to see if it slows down; it will not
Water near electrical outlets or panel	Shut off water first, avoid the wet electrical area, call for help	Do not stand in water to reach a breaker

Ranch homes in Brookside and wooded-lot homes in Woodland Hills with long crawlspace runs are our most frequent freeze calls. After a thaw, watch those same pipes closely for a day: a pipe that froze may have split and only leak once pressure returns. Our water line repair page covers what a burst section repair involves.

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Frequently Asked Questions

At what temperature do pipes freeze in Tennessee homes?

Pipes in unprotected spaces are at risk once outdoor temperatures stay in the low 20s or below for several hours, and wind exposure lowers that threshold. Interior pipes in heated walls tolerate much colder weather, which is why crawlspace and exterior wall runs freeze first.

Should I drip every faucet on a cold night?

Prioritize faucets on exterior walls and above crawlspaces, plus the fixture farthest from where water enters the house. A slow, steady drip is enough. Showers and tubs on outside walls count too, not just sinks.

Can I thaw a frozen pipe myself?

Often, yes, with gentle heat: a hair dryer, a space heater placed nearby, or warm towels, working from the faucet back toward the frozen section. Keep the faucet open. Never use a torch or open flame, and stop and call if you cannot find the freeze point.

A pipe burst while I was at work. What matters most now?

Shut off the main valve as soon as you can, open faucets to drain the system, and move belongings out of the wet area. Then call (615) 583-1830 on the 24/7 line. Document damage with photos for your insurer before cleanup if it is safe to do so.

Does pipe insulation really prevent bursting?

Insulation slows freezing significantly and protects through most La Vergne cold snaps, especially paired with sealing crawlspace vents. In an extended deep freeze, dripping faucets adds the second layer of protection. Together they prevent nearly all residential freeze breaks.

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