Home › Water Damage Restoration › Frozen Pipe Burst
Frozen Pipes in Houston: A Bigger Risk Here Than People Think
The short answer
Houston pipes freeze more easily than northern ones not because it gets colder, but because Texas homes aren't built for cold — water lines run through uninsulated attics and exterior walls. Pipes are at risk below about 20°F. If one bursts, shut off the water at the main immediately, cut power near any standing water, open faucets to relieve pressure, and start extraction. Insurance generally covers it if you kept the home heated. Call (346) 385-3496 for drying before mold starts.
Why a Houston freeze is so destructive
In February 2021, Winter Storm Uri froze and burst pipes across the entire Texas region at the same time — and it wasn't because Texas got colder than Minnesota. It's that Texas homes are engineered for 100°F summers, not hard freezes. Water lines here are commonly run through uninsulated attics, exterior walls, and unconditioned garages — placements that building practice in cold states would never allow. So a freeze that a northern home shrugs off can burst pipes all over a Houston neighborhood in a single night.
Water expands about 9% when it freezes. In a closed pipe, that expansion has nowhere to go, so pressure builds until the pipe splits — and then, when it thaws, it pours.
Before a freeze: protect the pipes
- Drip your faucets. Moving water is far harder to freeze; a slow trickle on the coldest lines helps.
- Open cabinet doors under sinks on exterior walls so heated room air reaches the pipes.
- Disconnect and drain outdoor hoses, and cover exterior spigots with insulated covers.
- Insulate exposed pipes in the attic and garage with foam sleeves.
- Keep the heat on — even if you leave town. A cold, unheated house is where the worst bursts happen (and where insurers ask questions).
- Find your main shut-off now so you can stop a burst in seconds, not minutes.
If a pipe freezes but hasn't burst yet
- Open the faucet it feeds so melting water has somewhere to go.
- Warm the frozen section gently — hair dryer or space heater, starting near the faucet end. Never an open flame.
- Can't reach it, or it's in a wall? Shut the main and call a plumber before it splits.
If it bursts
- Main water off — first, always.
- Power off near any standing water at outlets.
- Relieve pressure by opening faucets.
- Extract and lift belongings; photograph everything for the claim.
- Call for drying. A burst runs at full pressure and spreads fast — here's the full first-hour burst-pipe checklist. (346) 385-3496.
The insurance angle
A burst frozen pipe is generally a covered sudden loss in Texas — as long as you took reasonable care to keep the home heated. The scenario insurers push back on is a vacant or unheated house, which can be treated as a maintenance failure. So during a freeze, leaving some heat on isn't just about comfort; it's what keeps your claim clean. More on coverage: does insurance cover water damage.
Frozen Pipe Questions
At what temperature do pipes freeze in Texas?
Pipes are generally at risk once the temperature drops below about 20°F (-6°C), and sooner for pipes in unprotected spots like attics, exterior walls, and unheated garages. In Texas the danger is less about how cold it gets and more about how unprepared homes are — pipes are often run through uninsulated attics and exterior walls that would never be allowed in colder states.
Why do pipes freeze so easily in Texas?
Because Texas homes are built for heat, not cold. Water lines are frequently routed through uninsulated attics, exterior walls, and unconditioned spaces, and homeowners aren't used to protecting them. So when a hard freeze hits — like Winter Storm Uri in February 2021 — pipes that would be safely insulated up north freeze, expand, and burst all over the region at once.
Does homeowners insurance cover a frozen pipe burst?
Usually yes, if you took reasonable steps to keep the home heated. Most Texas policies cover sudden water damage from a burst frozen pipe. The main exception is if the home was left unheated — for example, a vacant house with the heat off — which insurers may treat as a failure to maintain. Keeping some heat on during a freeze protects both your pipes and your claim.
How do I keep my pipes from freezing in Houston?
Before a freeze: let faucets drip (moving water resists freezing), open cabinet doors under sinks on exterior walls to let warm air in, disconnect and drain outdoor hoses and cover spigots, insulate exposed pipes in the attic and garage, and keep the house heated even if you leave. Know where your main shut-off is so you can act fast if one does burst.
What do I do if a frozen pipe bursts?
Shut off the water at the main valve immediately, then cut power to any area with standing water near outlets, open faucets to relieve pressure, and start extracting water and moving belongings up. Photograph everything for your claim. Then call for professional extraction and drying — a burst releases water at full pressure and the damage spreads fast.
How do I thaw a frozen pipe before it bursts?
If a pipe is frozen but hasn't burst, open the faucet it feeds and gently warm the frozen section with a hair dryer or space heater kept away from water — never an open flame. Start warming near the faucet end so melting water can escape. If you can't reach the frozen section or it's inside a wall, shut off the main and call a plumber before it bursts.
Should I drip my faucets during a freeze in Houston?
Yes. Moving water freezes slower than still water. Turn on the coldest faucets—usually ones on exterior walls or the top floor—to a slow drip. It costs pennies in water and can save thousands in damage. Keep dripping until temperatures climb back above freezing.
Can I use a heat gun or space heater to thaw a frozen pipe?
A space heater or hair dryer works. Never use a torch or open flame—it can rupture the pipe, scald you, or start a fire. Start warming near the faucet end and work back toward the frozen section. If you can't reach it or it's in a wall, stop and call a plumber.
Standing water right now? Every hour matters.
Mold can begin developing within 24–48 hours in Houston humidity. Call or text a photo of the damage and we’ll tell you what it needs — no obligation, straight answer.
Call or text (346) 385-3496 charley@mitigationmaven.com