Houston Pipe Freeze Prep: 7 Steps Before Temps Drop
HHSG Editorial Team
Houston Home Services Guide — Editorial Team
Why Houston Pipes Are Especially Vulnerable
Houston’s plumbing systems are not designed for freeze events. Unlike homes in Minneapolis or Denver where builders insulate pipes as standard practice, most Houston homes were built assuming pipes would never face sustained sub-freezing temperatures. Builders ran copper and PEX through unconditioned attics, along exterior garage walls, and through poorly insulated slab penetrations.
When Winter Storm Uri hit Texas in February 2021, hundreds of thousands of Houston-area homes saw pipes burst — not because the cold was unprecedented, but because Houston’s housing stock had never been stress-tested for an extended freeze. Insurance carriers paid out an estimated $19 billion across Texas, most of it for burst-pipe water damage.
The seven steps below are the standard Houston master plumber checklist for pre-freeze prep. None of them require special tools. All of them dramatically reduce the chance of a burst pipe.
[Placeholder body — full article copy will be supplied by the blog pipeline in Session 05+.]
When to Call a Pro
If a freeze is forecast within 48 hours and any of the following apply, call a licensed Houston plumber rather than DIY:
- Your home is older than 1995 and has galvanized steel or copper lines you can’t visually inspect.
- You have a tankless water heater on an exterior wall (especially common in Houston new construction).
- You travel frequently and the home will be vacant during the freeze event.
- You’ve had a slab leak repaired in the past 3 years (re-pressurized lines need post-repair inspection before a freeze).
The pre-freeze inspection runs $150-$300 — a tiny fraction of a burst-pipe restoration bill.
Step-by-Step Guide
- 1
Locate your main shutoff valve
Find the main water shutoff before temps drop. In most Houston slab-on-grade homes built after 1990, it's in the garage or on an exterior wall near the meter. Know this location cold — if a pipe bursts at 2am, there's no time to search.
- 2
Insulate exposed pipes in the garage and under sinks
Foam pipe insulation (available at any Home Depot or Lowe's, $3-8 per 6-foot section) wraps around exposed pipes. Pay special attention to pipes along exterior garage walls and under kitchen and bathroom sinks on exterior walls.
- 3
Disconnect and drain outdoor hose bibs
Disconnect all garden hoses. Open the hose bib to drain standing water. If your home has a shutoff valve for outdoor hose bibs (many Houston homes do), close it and open the exterior bib to drain the line.
- 4
Set minimum heat to 55°F — even if you're traveling
Pipe freezes in Houston usually happen in vacant homes where owners cut heat to save money during a trip. Keep heat at minimum 55°F. The $20 extra in electricity is cheap compared to a burst-pipe restoration bill averaging $10,000-25,000.
- 5
Open cabinet doors under sinks on exterior walls
On nights below 28°F, open cabinet doors under kitchen and bathroom sinks that sit on exterior walls. This allows heated interior air to circulate around the pipes.
- 6
Let a trickle run on vulnerable faucets
Moving water is harder to freeze. On nights forecast below 25°F, let the faucet farthest from your meter drip slowly — about the width of a pencil. This keeps circulation through the system.
- 7
Know your emergency plumber now, not when water is pouring
Houston plumbers' phones go straight to voicemail during a winter storm event. Identify a licensed plumber you'd call before the freeze — save their number in your phone. Check that they hold a current TDLR license at license.tdlr.texas.gov.
Find a Plumbing Contractor Near You
Frequently Asked Questions
At what temperature do pipes freeze in Houston homes?
Does my homeowner's insurance cover burst pipes from a freeze?
How much does it cost to repair a burst pipe in Houston?
About the Author
HHSG Editorial Team
Houston Home Services Guide — Editorial Team
The Houston Home Services Guide editorial team researches local home-service topics using Houston-area building codes, permitting rules, FEMA flood data, and guidance from licensed local contractors. Every article is reviewed for accuracy against local conditions before it is published.