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Winter Freeze Prep: How to Protect Your Pipes and Roof

Last updated October 25, 2026

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The short answer

Insulate Your Pipes

Wrap exposed pipes in foam insulation, especially in unheated areas like garages, crawl spaces, and attics. Use pipe sleeves or heat tape for added protection. Seal any gaps where cold air can reach the pipes, such as around vents or foundation openings.

For pipes that run along exterior walls, open cabinet doors during freezing nights to let warm air circulate. Let a trickle of water run from faucets to keep water moving. If you have a shutoff valve, know its location so you can turn off water quickly if a pipe bursts.

  • Foam pipe sleeves for straight runs
  • Heat tape for problem spots
  • Caulk or spray foam for gaps
  • Drain outdoor hoses and shut off exterior spigots

Protect Your Roof from Ice Dams

Ice dams form when snow melts on a warm roof and refreezes at the eaves, blocking drainage. The trapped water can back up under shingles and leak into your home. Keep your attic well-ventilated and insulated to keep the roof surface cold.

Clean gutters and downspouts before winter so melting snow can flow away. Use a roof rake to remove snow from the lower edges after heavy snowfall, but avoid damaging shingles. If you notice water stains on ceilings, act quickly to minimize damage.

  • Clean gutters and downspouts in late fall
  • Add attic insulation to reduce heat loss
  • Use a roof rake for snow removal
  • Check for loose or damaged shingles before winter

Seal Air Leaks and Drafts

Cold air can enter your home through gaps around windows, doors, and utility penetrations. These drafts can freeze pipes inside walls and increase heating costs. Use caulk or weatherstripping to seal openings, and check the areas where pipes enter the house.

Pay attention to the attic hatch, where warm air can escape and melt roof snow unevenly. Also inspect the roof for missing or cracked shingles that could allow water in during freeze-thaw cycles.

A small investment in sealing materials can prevent larger problems. Walk around your home on a windy day and feel for cold spots. Fixing drafts now is easier than dealing with burst pipes or roof leaks later.

Know What to Do After a Freeze

If a pipe freezes, turn off the water at the main shutoff valve. Open faucets to relieve pressure, then gently warm the pipe with a hair dryer or space heater. Never use an open flame. If a pipe has burst, shut off water immediately and call a plumber.

If you discover water damage on walls, ceilings, or floors, act quickly to prevent mold and structural issues. Local water damage pros can extract standing water and set up drying equipment. They can also inspect for hidden moisture and help you decide what to repair or replace.

  • Turn off water at the main valve
  • Open all faucets to drain lines
  • Use a hair dryer to thaw, not a torch
  • Call a plumber for burst pipes
  • Contact the pros for cleanup

Consider Professional Inspections

A roof inspection before winter can catch loose shingles, cracked flashing, or clogged vents that lead to leaks. A water damage inspection can identify moisture problems in walls or ceilings that may worsen with freezing weather. These checks give you a clear picture of your home's vulnerabilities.

If you suspect hidden moisture after a freeze, a moisture mapping service can pinpoint wet areas without tearing open walls. This helps you target repairs and avoid unnecessary demolition. For serious leaks, leak detection services can locate the source quickly.

Policies vary, and your insurer decides what is covered. Check your policy to understand what winter-related damage is included. If you need to file a claim, document the damage with photos and notes.

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Frequently asked questions

What temperature should I worry about for pipes freezing?

Pipes can freeze when outdoor temperatures stay below 20 degrees Fahrenheit for several hours. However, factors like wind chill, poor insulation, and unheated areas increase the risk. If temperatures are expected to drop near freezing, take precautions like dripping faucets and opening cabinet doors.

How do I know if I have an ice dam on my roof?

Look for icicles hanging from the eaves, especially if they are accompanied by water stains on interior ceilings or walls. Ice dams often form after heavy snow, when the attic is warm. Check your attic for frost or water marks, and use a roof rake to remove snow from the lower edge.

Can I prevent frozen pipes by leaving the heat on?

Keeping your home heated to at least 55 degrees Fahrenheit helps, but it is not always enough. Pipes in unheated areas like basements or crawl spaces can still freeze. Combine heat with insulation and sealing drafts for better protection. If you plan to be away, set your thermostat to a safe minimum and have someone check your home.

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