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Winterizing Your Home to Prevent Plumbing Leaks

Last updated October 25, 2026

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The short answer

Why Winterizing Matters

Cold weather can cause water inside pipes to freeze and expand, leading to cracks or bursts. When the ice thaws, water escapes and damages walls, floors, and belongings. Even in a humid subtropical climate with hot summers and spring hail and thunderstorms, winter temperatures can dip below freezing for short periods.

The goal of winterizing is to keep water moving or drain it from vulnerable areas. You reduce the risk of a sudden leak that requires emergency cleanup. Simple steps taken before a freeze can save you from major repairs and restoration work.

Drain Outdoor Water Lines

Outdoor faucets, sprinkler systems, and pool lines hold water that can freeze and crack. Disconnect garden hoses and drain them. Shut off the outdoor supply valve and open the faucet to let remaining water escape. Leave the faucet open during winter so any residual water has room to expand.

For irrigation systems, follow the manufacturer's instructions to blow out or drain the lines. If you have a pool, lower the water level and run the pump as recommended. These steps prevent underground leaks that are hard to detect.

  • Disconnect and drain garden hoses
  • Shut off outdoor supply valves
  • Open faucets to allow drainage
  • Drain sprinkler and irrigation lines
  • Lower pool water levels per instructions

Insulate Exposed Pipes

Pipes in unheated areas like attics, garages, and crawl spaces are most at risk. Wrap them with foam pipe insulation or heat tape. Focus on sections near exterior walls and where pipes enter the house. Insulation slows heat loss and gives water a better chance of staying liquid.

Check for gaps or holes in walls where cold air can reach pipes. Seal these with caulk or spray foam. You can also open cabinet doors under sinks during a freeze to let warm room air circulate. These small steps add up to significant protection.

Keep Indoor Temperatures Steady

Set your thermostat to the same temperature day and night during cold snaps. Lowering the heat at night can allow pipes to cool enough to freeze. Keep the heat at least 55 degrees Fahrenheit, even when you are away. This maintains a baseline warmth throughout the home.

If you travel during winter, consider having someone check your home daily. They can run water briefly to keep it moving. A slow drip from a faucet can prevent pressure buildup, but only if you know the pipe is vulnerable. Use this method sparingly and only when necessary.

Know Your Shutoff Valve

Every homeowner should know where the main water shutoff valve is and how to turn it off. This valve is often near the water meter or where the main line enters the house. If a pipe bursts, shutting off the water quickly limits damage. Write the location down and share it with family members.

If you live in Frisco, keep your shutoff valve location written down and visible. Practice turning it off once a year so you are confident in an emergency. If you discover a leak after a freeze, shut off the water and call local water damage pros for cleanup and repair.

  • Locate the main shutoff valve
  • Label the valve clearly
  • Test it once a year
  • Teach family members how to use it
  • Keep a wrench nearby if needed

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Frequently asked questions

What temperature should I keep my house to prevent frozen pipes?

Keep your thermostat at 55 degrees Fahrenheit or higher, even when away. This includes overnight. A consistent temperature prevents cold spots where pipes can freeze. If you have pipes in exterior walls, open cabinet doors to let warm air reach them.

Should I leave faucets dripping during a freeze?

A slow drip can help prevent freezing, but it is not always necessary. Use it for pipes that are prone to freezing or in unheated areas. Let both hot and cold water drip slightly. This keeps water moving and reduces pressure buildup. Do not rely on dripping alone.

What should I do if a pipe bursts?

Shut off the main water valve immediately to stop the flow. Then open faucets to drain remaining water. Turn off the heating system if water is near electrical outlets. Call local water damage pros to handle cleanup and repairs. Document the damage for your insurance claim. Policies vary, and your insurer decides what is covered.

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