How to Prevent Frozen Pipes in Nashville Winters

Nashville winters don't always stay above freezing — and the pipes that burst here are rarely the ones homeowners expected to worry about.

Why Nashville Pipes Freeze (Even When It's Not That Cold)

Middle Tennessee homes weren't all built with the same cold-weather considerations as homes further north. Insulation around plumbing runs is often minimal, and exterior wall plumbing — common in older Nashville neighborhoods — sits closer to outside temperatures than people realize.

Pipes typically freeze when they sit below 20°F for several hours. That happens here multiple times each winter, usually during the first hard cold snap when nobody has thought about it yet.

The High-Risk Zones

• Crawl space plumbing. Pipes running through a vented crawl space are the single most common burst location in Nashville homes.
• Exterior wall plumbing. Kitchen sinks on outside walls, bathrooms above garages, and any pipe inside an exterior cavity.
• Garage water lines. Utility sinks, hose bibs, and the line running to outdoor irrigation.
• Attic plumbing. Less common, but plumbing routed through attics in older homes can freeze fast.

Knowing which zones your home has is half the battle. The other half is preparing them before the first freeze warning.

What Actually Works

Foam pipe insulation on accessible runs is the single highest-ROI move. Pre-slit foam sleeves go on in minutes and cost almost nothing relative to one burst pipe.

Heat tape or pipe-heating cable handles the runs that insulation alone won't protect — particularly long crawl-space runs and any exposed line that's been a problem in previous winters.

Closing crawl space vents during sustained cold (and reopening in spring) cuts the wind exposure that drops crawl pipe temperatures below the air temperature outside.

Disconnecting and draining outdoor hoses before the first freeze prevents the hose bib from holding water against the shut-off and splitting the line back inside the wall.

The 'Drip the Faucets' Question

Yes, it works — but only for the fixtures you actually drip. A pencil-thin stream from the farthest, coldest faucet keeps water moving through the most vulnerable line. Don't drip every faucet; drip the one at the end of the run from the most exposed pipe.

Cabinet doors under sinks on exterior walls should also be opened during a hard freeze. That lets house heat reach the pipes inside the cabinet.

What to Do If a Pipe Has Already Frozen

If you turn on a faucet and only a trickle comes out during cold weather, a pipe is likely frozen but hasn't burst yet. The clock is now ticking.

Shut off the main water supply. Open the affected faucet to relieve pressure. Apply gentle heat — hair dryer, warm towels, space heater near (not on) the pipe. Never use an open flame.

Once flow returns, check every connection nearby for leaks before turning the main back on at full pressure. Cracked pipes often don't visibly leak until thawed.

When to Call a Plumber

Frozen pipe in an inaccessible spot, water already in the walls, multiple fixtures with no water, or any visible bulge or split on a pipe — those all need a plumber, not a hair dryer. Same for any home where the main shut-off can't be found or doesn't work.

Frequently Asked Questions

What temperature do pipes actually freeze at?

Water freezes at 32°F, but pipes typically need to sit below 20°F for several hours before the water inside freezes solid enough to cause damage.

Should I leave the heat on if I'm gone for the holidays?

Yes. Keep the thermostat at 55°F minimum if you'll be away during cold weather. Also shut off the main and drain the lines if you'll be gone more than a few days.

Does insurance cover burst pipes?

Most homeowner policies do cover sudden burst pipes, but won't cover damage from a frozen pipe if you failed to maintain heat. Read your specific policy.

Are PEX pipes less likely to burst than copper?

PEX has more flexibility and tolerates a freeze better than rigid copper, but it can still split if water expands hard enough. PEX is more forgiving, not freeze-proof.