Winterizing Your Central Texas Plumbing Before the Next Hard Freeze

Most homes in Georgetown and the rest of Central Texas were built for heat, not cold. Insulation, pipe routing, even where the water heater sits, all of it assumes the coldest night of the year is still well above freezing. Most years that assumption holds. Then a cold front drops the temperature twenty or thirty degrees overnight, and the pipes that were never insulated because nobody expected they'd need to be are suddenly the weak point in the whole house.

How a pipe actually fails in the cold

Water expands by roughly nine percent when it freezes. Inside a closed pipe, that expansion has nowhere to go. Ice usually forms first at the coldest point, often where a line runs through an exterior wall, a garage, or an unheated attic. As the ice plug grows, it doesn't have to be the ice itself that splits the pipe. The freezing water traps a section of liquid water between the plug and a closed valve or fixture, and pressure builds in that trapped section until something gives. That's why the crack often shows up several feet from where the ice actually formed, which throws people off when they're trying to find the leak.

Not every pipe material handles it the same way

PEX has some flexibility built into it and can survive a brief freeze better than a rigid line, but flexibility only buys a little margin, not immunity. Copper and CPVC have almost none of that give, so a hard freeze finds their weak points fast, usually at a joint or fitting rather than along a straight run. Older galvanized steel, still common in houses built before the 1960s, is the least forgiving of all, since decades of internal corrosion have already thinned the pipe wall in places nobody can see from outside. No material is freeze proof once ice fully blocks a line and pressure has nowhere left to go.

Why these freezes catch people off guard

A lot of Central Texas winters swing hard, seventy degrees one afternoon and below freezing by the next morning, with no gradual ramp-up the way a truly cold climate gets one. That fast swing is part of the problem. There's no week of steadily dropping temperatures reminding anyone to wrap a pipe or drain a hose. One front comes through, the temperature drops overnight, and whatever wasn't prepped stays exposed for the whole event. A freeze that stretches across two or three nights instead of one is worse still, since a pipe that survives a single cold night on residual warmth from the house can still fail on night two or three once that buffer is gone.

The parts of your house that are actually exposed

Inside a typical Central Texas home, the vulnerable runs are predictable. Hose bibs on an exterior wall. Supply lines running through a garage, especially if the garage has a laundry hookup. Pipe runs in an attic feeding a tankless water heater or a second bathroom. Anything under a pier and beam floor or in a crawlspace with no skirting to block the wind. None of these get a second thought most of the year. They're the first thing worth checking before a freeze warning goes out. Foam pipe sleeves, split down one side and pressed over the pipe, handle a short cold snap fine on most exposed runs. For a pipe that's going to sit below freezing for more than a night or two, electric heat tape wrapped under the insulation and plugged in for the duration does more work than foam alone.

• Disconnect garden hoses and drain outdoor spigots completely
• Wrap or foam-insulate any exposed pipe in a garage, attic, or crawlspace
• Seal gaps around garage doors and foundation vents that let cold air reach pipes
• Let a slow trickle run from a faucet fed by an exposed line on the coldest nights
• Know where your main shutoff is before you need it in the dark

Shelton Plumbing publishes their own winterizing walkthrough on YouTube each year, camera pointed at real exposed pipe runs rather than stock footage, which is a decent way to see what an insulated line looks like next to an exposed one before you're doing this comparison yourself with a flashlight. Their advice also includes something easy to overlook: nudging the water heater thermostat up toward 120 degrees or higher going into a hard freeze gives the system a little more margin if demand spikes while everyone's running faucets at once.

If a pipe has already split

Shut the water off at the main first, not at the fixture. Then open the nearest faucet to relieve pressure in the line so you're not fighting standing pressure while you figure out next steps. Don't run the water heater if you suspect the cold water supply line to it has already failed. Past that point it's not a homeowner repair anymore, it's a call.

If you're in Georgetown or anywhere in Central Texas and a freeze has already found the weak spot in your plumbing, or you'd rather find it before it finds you, call Shelton Plumbing at (254) 751-9655. We can't give you an accurate quote over the phone, but we can give you a precise estimate on site before we start any work.