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Every winter I get the same calls, and they almost all trace back to one outdoor faucet nobody touched in October. A burst hose bibb doesn’t leak politely — it sprays inside your wall until someone notices the ceiling. The fix costs fifteen minutes in the fall. The failure costs a drywall contractor.
Quick Answer: The 15-Minute Winterization Checklist
- Disconnect every garden hose. This is the whole ballgame — a connected hose traps water in the faucet body and is the #1 cause of split hose bibbs. Quick-connect fittings come off too.
- Shut the interior stop valve (if your home has one) on the line feeding each outdoor faucet, then open the outdoor faucet to drain the stub-out.
- Leave the outdoor handle open over winter so any remaining water has room to expand.
- Cover each faucet with an insulated faucet cover — hard-shell foam or insulated pouch.
- Insulate exposed pipe in crawl spaces, garages, and rim-joist penetrations with foam pipe insulation sleeves; use thermostatic heat tape only where sleeves aren’t enough.
Why Outdoor Faucets Burst (the 30-Second Physics)
Water expands roughly 9% when it freezes, and it doesn’t compress — the pressure has to go somewhere, and copper or PEX gives out at the weakest point. The cruel part: the split usually happens inside the heated wall, so you don’t see anything until spring, the first time you connect a hose and pressurize the line. That’s why the “it worked fine last year” faucet floods a basement in April.
Do Outdoor Faucet Covers Actually Work?
Yes — with an honest caveat. A cover traps the radiant heat escaping the wall and buys you protection through sustained hard freezes, and at a few dollars each they’re the cheapest insurance in plumbing. But a cover cannot save a faucet with a hose still attached. Disconnect first; cover second.
What to buy: both common types work when installed snugly (I compare specific models in our best outdoor faucet covers guide):
- Hard-shell foam domes — rigid covers with a draw-loop that hooks the spigot and pulls the shell tight to the wall. Most durable, best for faucets that stick out square from flat siding.
- Insulated fabric pouches — flexible bags that cinch around odd angles, tight corners, and frost-free sillcocks with vacuum breakers that domes won’t seat over.
Fit matters more than brand: the cover must seal against the wall with no gap. Measure from the wall to the end of the spout before you buy, and grab one spare — they crack when stepped on, always in January.
If You Have Frost-Free Sillcocks, Read This Anyway
A frost-free (frost-proof) sillcock puts the shutoff washer a foot inside the heated wall, and builders install them precisely so you can skip most of this list. But they still burst every winter for one reason: a connected hose defeats the design. The long barrel can’t drain with a hose holding water in it. Disconnect the hose and a frost-free faucet genuinely takes care of itself; leave it on and it fails exactly like the old style — just deeper inside your wall.
If One Bursts Anyway
Shut off water at the main, then deal with the pipe. A pipe repair clamp will hold a split line overnight until a permanent fix, and our guide to pinhole leaks in copper pipe covers what the repair actually involves. If water ran inside a wall for any length of time, run your numbers through the leak cost calculator — and check what an emergency plumber visit costs before you’re negotiating one at 2 a.m.
The Rest of the Cold-Weather Checklist
While you’re at it: drip one indoor faucet on an exterior wall during hard freezes (moving water resists freezing), open vanity cabinets on exterior walls to let room heat reach the pipes, and know where your main shutoff is before you need it. If your hose bibbs use quick-connect fittings, those come off for the season too — metal quick-connects trap water just like a hose.
FAQ
At what temperature do outdoor faucets freeze?
Exposed faucets and pipes are at real risk once temperatures hold at or below about 28°F for several hours — a brief dip to freezing rarely does it, but an overnight hard freeze will. In Georgia and across the South, the danger nights are the two or three Arctic snaps each winter, which is exactly why unwinterized faucets are so common here.
Should I let my outdoor faucet drip in winter?
No — for outdoor faucets, dripping wastes water and can ice up the spout. Disconnect, drain, and cover instead. The dripping trick is for indoor faucets on exterior walls during hard freezes.
When should I winterize outdoor faucets?
Before the first hard freeze — in most of the South that means October; in northern climates, late September. It’s a 15-minute job, and doing it early costs nothing.
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