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How Do You Winterize a Home to Prevent Freeze Damage?

Last updated October 23, 2026

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The short answer

Protect Your Plumbing System

The most critical winterization task is safeguarding your home's pipes. Frozen water inside a pipe expands, creating immense pressure that can crack the pipe and lead to a significant leak. This damage often happens inside walls or ceilings, where you cannot see it until water stains or drips appear. Protecting both interior and exterior plumbing is essential for avoiding this hidden threat.

Begin by locating and learning how to operate your home's main water shutoff valve. If a pipe does burst, quickly turning off the water here can limit the amount of water released. Next, drain and disconnect all outdoor hoses. Close the interior shutoff valves for outdoor faucets, then open the outdoor faucet to let any remaining water drain out completely before winter sets in.

Insulate Pipes and Vulnerable Areas

Pipes in unheated spaces like attics, garages, and crawl spaces are at high risk of freezing. You can insulate these pipes using foam pipe sleeves, which are widely available. For extra protection on extremely cold nights, consider using heat tape or cable, but be sure to follow the manufacturer's installation instructions carefully to prevent a fire hazard. Never use an open flame to thaw a pipe.

Also, seal air leaks in your home's exterior that let cold air reach pipes. Check around where pipes enter the home, such as through exterior walls or the foundation. Use caulk or spray foam to close these gaps. In areas where hard freezes are rare, it is easy to overlook these steps, but a sudden cold snap can still cause problems.

  • Wrap exposed indoor pipes in unheated areas with foam insulation sleeves.
  • Apply heat tape specifically designed for pipes, following all safety guidelines.
  • Seal gaps in walls and foundations near pipes with caulk or expanding foam.
  • Keep cabinet doors under sinks open on very cold nights to allow warm air to circulate.
  • Let a small trickle of cold water drip from faucets during a freeze warning.
  • Know the location of your main water shutoff valve and test that it works.

Prepare Your Home's Interior

Your heating system plays a key role in keeping pipes from freezing. Have your furnace or heat pump inspected and serviced before the cold season to ensure it runs efficiently. Set your thermostat to at least 55 degrees Fahrenheit, even if you plan to be away, to maintain a baseline of warmth. A programmable thermostat can help manage this automatically and may save on energy costs.

Safeguard the Exterior and Drainage

Gutters and downspouts must be clear of leaves and debris before winter. If they are clogged, melting ice and winter rain can back up and seep under your roof shingles or into your home's siding. This moisture can then refreeze, causing issues with your roof or worsening cracks. Proper drainage directs water away from your foundation, which is important year-round.

What to Do If Freeze Damage Occurs

If you discover a burst pipe or water damage from freezing, your first step is to stop the flow of water by turning off the main shutoff valve. Then, safely shut off electricity to the affected area if any wiring or outlets are wet. Move any furniture or valuables you can to a dry area to prevent further damage. Acting quickly can help limit the scope of the problem.

Water from a burst pipe can soak into drywall, insulation, and flooring, creating an environment for mold to grow within 24 to 48 hours. This is when you should contact local water damage pros. They have the equipment to extract standing water, thoroughly dry the structure, and assess for hidden moisture. Timely professional drying is crucial to prevent secondary damage and mold.

  • Immediately shut off the main water supply to your home.
  • Turn off electrical power to the wet area at the breaker panel if safe to do so.
  • Remove as much water as possible with towels, a mop, or a wet-dry vacuum.
  • Move furniture and other belongings away from the water to a dry spot.
  • Use fans and dehumidifiers to begin the drying process if it is safe.
  • Contact local water damage pros for a thorough assessment and drying.

Talk to someone now

Every hour counts once water gets into floors and walls. One call starts the response.

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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, especially if they are exposed to wind. However, pipes in uninsulated areas like attics or crawl spaces can freeze when outdoor temperatures remain at or below 32 degrees for several consecutive hours.

Does homeowners insurance cover water damage from frozen pipes?

Many homeowners policies cover sudden, accidental water damage from a burst pipe if you have taken reasonable care to winterize your home. Policies vary, and your insurer decides what is covered. You should check your specific policy details and report any damage promptly to start a claim.

Can I winterize my home myself, or do I need a professional?

Most basic winterization tasks, like insulating pipes and draining outdoor faucets, are do-it-yourself projects. For complex systems, like draining a whole-house plumbing system in a vacation home, hiring a plumber is wise. If freeze damage occurs, local water damage pros handle the drying and restoration work.

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