Yes, turning up the heat can help unfreeze pipes, but it usually isn't enough on its own. Increasing your thermostat is most effective when paired with opening cabinet doors and applying direct heat to the exposed, frozen sections.
Yep, that easy. Fight the freeze with heat!
To thaw frozen pipes quickly, immediately open your faucets and safely apply heat to the frozen section—working from the faucet toward the blockage. Use a hair dryer, an electric heating pad, or towels soaked in hot water. Never use an open flame or blowtorch, as this poses a severe fire hazard.
Pipes typically begin to unfreeze naturally when the surrounding air or ambient temperature rises above freezing ( 32∘F32 raised to the composed with power cap F32∘𝐹 or 0∘C0 raised to the composed with power cap C0∘𝐶). However, depending on where the pipe is located (e.g., inside an exterior wall), the air inside the home often needs to be raised to 60∘F60 raised to the composed with power cap F60∘𝐹 to 70∘F70 raised to the composed with power cap F70∘𝐹 to effectively thaw them.
Frozen pipes are a big problem. Not only can they stop your heating and hot water from working properly, they can also burst – causing leaks, or even flooding.
On average, pipes can freeze within six to eight hours when temperatures stay at 20 degrees or lower. If pipes are poorly insulated or exposed to drafts, they may freeze even faster. This is why pipes often freeze overnight when temperatures drop significantly.
It's such a simple thing, leaving a single faucet dripping, but it can prevent so many complications later on. How much value does one dripping faucet have? A lot, if it keeps your home's water pipes from bursting during frigid weather.
At a constant 32°F (0∘C0 raised to the composed with power cap C0∘𝐶), it typically takes 12 hours or more for water in pipes to freeze, especially if the pipes are insulated. However, the exact timing fluctuates heavily depending on pipe exposure, insulation, and whether they are located in unheated areas like exterior walls.
Your pipes will eventually begin to thaw on their own once the temperatures rise above freezing. As they do so, you may begin to hear your pipes making gurgling, clanging, or banging sounds as the ice begins to move. The hot water heater may do the same.
As temps drop, the risk of having frozen pipes in your home increases. Typical high-risk areas for freezing include pipes within exterior walls, as well as exposed pipes that run through unheated or uninsulated areas such as attics or basements.
Do not use a blowtorch, kerosene or propane heater, charcoal stove, or other open flame device.
If a pipe is frozen but not damaged, a plumber may only need to thaw it. Thawing services typically cost $100 to $200 when pipes are easy to access. When pipes crack or burst, repairs become more complex and expensive.
Open any faucets connected to frozen pipes to relieve pressure. Faucets should be open but not fully open. If frozen pipes are exposed and visible, use a hair dryer or space heater to thaw ice blockages. Do not use an open flame.
Pipes can begin to freeze when temperatures drop to 20°F or below, especially if exposed to wind or located in unheated spaces. Pipes in exterior walls or unheated areas are at risk even in the upper 20s.
Avoid burst pipes and stay safe in winter:
Keep the heating on overnight at a low temperature if you can. If you have no heating, turn your water off at night, if possible. This should minimise any damage if there is a thaw overnight. Make sure there are no draughts from outside, especially near water pipes.
If temperatures fall to 20 degrees or lower and will stay there for an extended period of time, drip all the faucets in your home, especially those that are connected to pipes that run in exterior walls, as they are less insulated from the cold.
Uninsulated exterior pipes can freeze in under six hours if the temperature is below 20 degrees. It takes at least 12 hours for unprotected pipes to freeze at 32 degrees.
Plumbers fix frozen pipes by immediately opening faucets to relieve pressure, locating the ice blockage, and applying controlled heat. To safely thaw the ice without causing the pipe to crack, professionals use specialized pipe-thawing machines, infrared heat guns, commercial steamers, or industrial-grade heating cables.
Also, depending on the initial water temperatures, the freezing time could take 2 to 4 hours to freeze. Also, based on various experiments, the freezing time could take place between 30 minutes to about 1 hour and 40 minutes, depending on multiple factors.
Keep your thermostat set to a minimum of 55°F (13°C) to keep your pipes from freezing. If you are leaving the house for an extended period, maintain this temperature to ensure heat reaches the walls where pipes are located.
The Critical Temperature
However, the real danger zone begins when the wind chill drives temperatures down to 20°F (-6°C) or lower. If your home has plumbing located in unheated areas—such as basements, crawl spaces, garages, or exterior walls—you should prepare immediately when these conditions are forecast.
Even if you go out of town, keep your heat at 60°F or higher to prevent internal pipes from freezing. You should also try to maintain a constant temperature throughout the day. Many people turn their heat down at night to save money while they sleep.
To keep pipes from freezing, you should drip both hot and cold water. Hot water pipes are just as vulnerable to freezing as cold ones, and keeping both lines trickling ensures water is moving through the entire plumbing system, drastically reducing the risk of ice buildup.
Like most myths, there is certainly a component that is true. Dripping faucets does help prevent frozen pipes, but you don't need to drip every faucet in your house.