How Long Does It Take a Plumber to Unfreeze Pipes?

Waking up to no running water on a freezing winter morning is every homeowner’s nightmare. If you’re asking, “How long does it take a plumber to unfreeze pipes?”, you’re not alone—and you’re already taking the right step by seeking professional help. Frozen pipes aren’t just inconvenient; they can lead to costly bursts if not handled correctly. In this guide, we’ll break down realistic timelines, influencing factors, and what to expect when a licensed plumber arrives at your door.

What Determines How Long It Takes to Unfreeze Pipes?

The time required for a plumber to unfreeze pipes isn’t one-size-fits-all. Several key variables affect the process:

• Pipe location (exposed vs. inside walls)
• Severity of the freeze (partial vs. complete blockage)
• Type of pipe material (copper, PEX, PVC)
• Accessibility (basement vs. behind drywall)
• Ambient temperature

According to the U.S. Department of Energy, most frozen pipes can be thawed within 30 to 60 minutes if accessible. However, hidden or severely frozen lines may take 2–4 hours or longer, especially if drywall needs removal.

“The biggest delay isn’t the thawing—it’s finding the freeze point,” says Marcus Lee, a master plumber with over 15 years of experience in Minnesota. “Once we locate it, the actual heat application is quick.”

Step-by-Step: How a Professional Unfreezes Pipes

When a licensed plumber arrives, they follow a systematic, safety-first approach:

1. Shut off the main water supply
   Prevents flooding if the pipe bursts during thawing.
2. Locate the frozen section
   Uses thermal imaging cameras or checks for frost, bulging, or no water flow in specific fixtures.
3. Assess accessibility
   If the pipe is exposed (e.g., in a basement), work begins immediately. If inside a wall, a small access panel may be cut.
4. Apply controlled heat
   Common tools include:
   • Electric heat tape (wrapped around pipe)
   • Infrared lamps (radiant heat without direct contact)
   • Warm air blowers (like hair dryers, but industrial-grade)
   • Hot water-soaked towels (for minor freezes)
   ⚠️ Never use open flames (torches, lighters)—this risks fire or pipe damage.
5. Slowly restore water flow
   After thawing, the plumber opens the faucet slightly and monitors for leaks before fully restoring pressure.
6. Inspect for damage
   Even if the pipe didn’t burst, micro-cracks can develop. A pressure test may be performed.

Most jobs are completed in under 2 hours—but complex cases (e.g., multiple frozen lines in an unheated crawl space) can stretch to half a day.

DIY vs. Hiring a Plumber: Time & Risk Comparison

While DIY methods like using a hair dryer can work for exposed, mildly frozen pipes, the Insurance Institute for Business & Home Safety reports that nearly 250,000 U.S. homes suffer pipe freeze damage annually—many due to improper thawing.

For anything beyond a simple basement pipe, call a pro. The extra cost prevents thousands in water damage.

How to Prevent Frozen Pipes in the Future

Prevention saves time, money, and stress. Here’s what experts recommend:

• Insulate pipes in attics, garages, and basements with foam sleeves (R-3 or higher).
• Seal cracks near pipes using caulk or spray foam—cold air infiltration is a major cause.
• Keep thermostat ≥ 55°F when away in winter.
• Let faucets drip during extreme cold (just 5 drops/minute reduces pressure buildup).
• Open cabinet doors under sinks to allow warm air circulation.

The EPA’s WaterSense program notes that these steps can reduce freeze risk by up to 90%.

Real-World Example: A Chicago Homeowner’s Experience

In January 2025, temperatures in Chicago dropped to -15°F. Sarah K., a homeowner in Evanston, woke to no water in her kitchen. She called a local plumbing service at 7 a.m.

• 8:15 a.m.: Plumber arrived (emergency dispatch).
• 8:30 a.m.: Located frozen copper pipe inside an exterior wall using thermal imaging.
• 9:00 a.m.: Cut a 12″x12″ access panel, applied heat tape and infrared lamp.
• 9:45 a.m.: Water restored; no leaks detected.
• Total time: 1 hour 45 minutes
• Cost: $295 (including wall patching)

“I panicked at first,” Sarah said, “but the plumber was calm, fast, and explained everything. Worth every penny.”

FAQ Section

Q1: Can I unfreeze pipes myself to save time?

You can try—if the pipe is visible and easily reachable. Use a hair dryer on low heat, moving slowly along the pipe. Never use boiling water or open flames. If you don’t see results in 30 minutes, stop and call a plumber.

Q2: How long does it take for pipes to freeze?

At 20°F or below, pipes can freeze in as little as 6 hours—especially if uninsulated or in drafty areas. Wind chill accelerates this.

Q3: Will my homeowners insurance cover frozen pipe damage?

Most policies cover sudden, accidental discharge (like a burst pipe), but not gradual leaks or lack of maintenance. Check your policy—and always document repairs.

Q4: What if the pipe bursts while thawing?

Immediately shut off the main water valve and call your plumber and insurer. Do not touch electrical outlets near standing water.

Q5: Are PEX pipes less likely to freeze?

PEX is more flexible than copper and resists bursting—but it can still freeze. Insulation is still essential. Learn more about pipe materials on Wikipedia.

Q6: How much does emergency pipe thawing cost?

Average cost: $150–$500, depending on location, time of day, and complexity. Weekend/holiday calls may include a 20–50% surcharge.

Conclusion

So, how long does it take a plumber to unfreeze pipes? Typically 30 minutes to 4 hours—but speed depends on location, severity, and professionalism. More importantly, a licensed plumber doesn’t just thaw pipes; they prevent disasters and ensure your system is safe long-term.

Don’t gamble with frozen pipes. When in doubt, call a certified plumber—it’s faster, safer, and often cheaper than dealing with flood damage.

👉 Found this guide helpful? Share it with friends or family in cold climates! A quick share could save someone from a $10,000 water disaster this winter. #WinterHomeSafety #PlumbingTips