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What Is the Best Way to Prevent Frozen Pipes?

Last updated October 25, 2026

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The short answer

Insulate Vulnerable Water Pipes

Pipe insulation is your first line of defense against freezing. You should focus on pipes in unheated spaces, such as attics, basements, crawl spaces, and garages. Foam pipe sleeves are an easy DIY option for accessible pipes. For severe cold, consider using heat tape or cable, following the manufacturer's instructions carefully to avoid a fire hazard.

Check the condition of existing insulation before winter. Replace any insulation that is cracked, damp, or missing. Pay special attention to areas where pipes enter the home from outside, as these are common freezing points. A small investment in insulation can prevent a major water damage repair later.

Maintain Heat and Airflow

Keep your home's thermostat set to at least 55 degrees Fahrenheit, even when you are away. This consistent heat helps protect pipes inside walls and cabinets. Open kitchen and bathroom cabinet doors to allow warm air to circulate around plumbing, especially on exterior walls. This simple step can make a significant difference on bitterly cold nights.

Seal drafts and cracks near pipes with caulk or spray foam to keep cold air out. Check for air leaks around dryer vents, electrical wiring, and where pipes enter walls. Winter cold snaps can still be severe enough to freeze pipes if your home is not properly sealed, even in regions with generally mild winters.

Let Faucets Drip in Extreme Cold

Allowing a slow drip from faucets connected to vulnerable pipes relieves pressure inside the plumbing system. Moving water is much harder to freeze than standing water. You only need a thin, steady stream from the cold water tap. This tactic is particularly important for pipes on exterior walls or in unheated parts of your home.

Focus on faucets that are farthest from where water enters your home. Letting these drip ensures water moves through the longest stretches of pipe. While this uses a small amount of water, it is far less costly than repairing water damage from a burst pipe. Remember to also disconnect and drain outdoor garden hoses before winter.

Know Your Main Shutoff Valve

If a pipe does freeze and burst, your immediate action must be to stop the water flow. Every homeowner must know the location of the main water shutoff valve. This valve is often found where the main water line enters your home, such as in the basement, crawl space, or near the water heater.

Test the valve occasionally to ensure it turns easily. If it is stiff, a plumber can service it. In an emergency, turn the valve clockwise to shut off all water to the house. This quick action can limit the amount of water that floods your home, reducing the scale of the damage and the cleanup needed.

  • Locate your main water shutoff valve today.
  • Label the valve clearly so anyone can find it.
  • Ensure the valve is accessible and not blocked.
  • Teach all household members how to turn it off.
  • Consider installing an automatic water shutoff device.
  • Keep a wrench near the valve if it is hard to turn.

What to Do If a Pipe Bursts

Your first step is always to shut off the main water supply to stop the flooding. Then, turn off electricity at the circuit breaker for any wet areas to prevent shock. Immediately call a qualified plumber to repair the broken pipe. While you wait, you can start removing excess water with mops and towels to minimize damage.

After the pipe is fixed, you will need to address the water damage. Lingering moisture can ruin drywall, flooring, and personal belongings, and lead to mold growth within days. This is when you call local water damage pros. They have the equipment to thoroughly dry the structure and prevent secondary damage, which is a separate service from plumbing repair.

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Frequently asked questions

At what temperature do pipes typically freeze?

Pipes are at risk of freezing when temperatures drop below 20 degrees Fahrenheit. However, pipes in uninsulated exterior walls or crawl spaces can freeze at slightly higher temperatures, especially during sustained cold periods with wind. Insulation is crucial for protection.

Can I thaw a frozen pipe myself?

You can attempt to thaw a pipe if you know its location and it is accessible. Use a hair dryer or heating pad, starting near the faucet. Never use an open flame. If the pipe is inside a wall or you cannot find the freeze, call a plumber.

Will my insurance cover damage from a burst pipe?

Homeowners insurance often covers sudden, accidental water damage from a burst pipe. However, it may not cover damage from a lack of maintenance, like not insulating pipes. Policies vary, and your insurer decides what is covered. Check your policy and document the damage thoroughly.

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