Winter Home Maintenance: Protect Against Cold, Ice, and Burst Pipes

Winter is the season where maintenance mistakes become emergencies: a burst pipe at 2 a.m., an ice dam leaking into the attic, a space heater too close to the curtains. Do this work before the first hard freeze, and you'll spend the season comfortable instead of calling for help.

Freeze protection: keep pipes from bursting

Water expands about 9% when it freezes, and that expansion splits pipes — the leak usually appears later, when the ice thaws. Most at risk: outdoor hose bibs, supply lines in unheated spaces, and pipes on poorly insulated exterior walls. The American Red Cross guidance is the standard:

• Insulate exposed pipes. Slip foam sleeves over pipes in unheated areas and cover outdoor faucets with insulated faucet covers — cheap insurance against the most common freeze locations.
• Let faucets drip when it's very cold. When temperatures drop well below freezing, let cold water drip from the faucet served by exposed pipes — running water, even at a trickle, helps keep the line from freezing. This applies to faucets on vulnerable runs, not every tap in the house.
• Open cabinet doors under sinks on exterior walls so warm room air circulates around the plumbing (move cleaners and chemicals out of reach of children and pets first).
• Keep garage doors closed if any water supply lines run through the garage, and keep the thermostat steady day and night during extreme cold — suspending the nighttime setback costs a little heat but prevents a far costlier burst-pipe repair.
• Know where your main water shutoff is. If a pipe bursts, shutting off the water within minutes is the difference between a cleanup and a gut renovation.

A faucet that only trickles when it should flow freely means a frozen pipe: keep it open and warm the section gently with a hair dryer, heating pad, or hot towels. Never use an open flame — it's a fire risk, and rapid, uneven heating can make the pipe burst. If you can't find or reach the frozen section, call a plumber.

Ice dams: what they are and how to prevent them

The cause

Ice dams aren't caused by gutters or heavy snow alone — they're caused by heat escaping into the attic. Warm air heats the roof deck, snow on the upper roof melts, and the meltwater refreezes at the colder eaves. The growing ridge traps liquid water behind it, which backs up under the shingles and into the attic and walls.

Safe prevention

The reliable fix is keeping the roof deck near outdoor temperature. The Building America Solution Center (a DOE national-lab program) lists the three steps, in order of importance:

• 1. Air-seal the ceiling plane — the most important step. Seal gaps around wiring, recessed lights, plumbing stacks, flues, chimneys, and attic hatches so warm air can't leak into the attic.
• 2. Insulate the attic thoroughly to the level recommended for your climate zone, so less heat reaches the roof deck.
• 3. Ventilate the roof with soffit intake plus ridge or gable exhaust vents, keeping cold air moving under the deck.

Keep gutters clean before the first snow, and use a roof rake from the ground to pull snow off the lower three to four feet of roof after heavy storms. A large, actively leaking dam calls for a roofing professional — many offer low-pressure steam removal that clears ice without damaging the roof.

What NOT to do

• Don't chip or hack at the ice. Axes, hammers, and picks damage shingles and flashing — trading a leak for a bigger leak.
• Don't climb onto an icy roof. The fall risk is severe; roof rakes exist so you can work from the ground.
• Don't use plain rock salt — it corrodes gutters and damages shingles. A roof-labeled melting product treats the symptom, not the heat-loss cause: if dams recur every winter, the attic needs air-sealing and insulation, and an energy audit is money well spent.

Space heater safety

Heating equipment is the second-leading cause of U.S. home fires, and space heaters are involved in a disproportionate share — roughly 43% of home heating fires and the large majority of heating fire deaths, per the NFPA, with more than half of those deaths starting with equipment placed too close to things that can burn:

• Turn it off when you leave the room or go to sleep. Unattended heaters start most of these fires.
• Plug it directly into the wall outlet — never an extension cord or power strip, which can overheat under a heater's sustained load. One heat-producing appliance per outlet.
• Buy one with safety features: tip-over shutoff and overheat protection from a recognized testing laboratory.
• Never use an oven or stovetop to heat your home — it's a fire and carbon monoxide hazard.

Generator safety: carbon monoxide kills

Winter storms knock out power, and portable generators are the most dangerous thing most homeowners will ever operate. Carbon monoxide is colorless and odorless, can kill within minutes, and victims often lose consciousness before recognizing symptoms — the CPSC reports about 100 U.S. deaths per year from generator-related CO poisoning. Every rule here is from the CPSC:

• Never backfeed: don't plug the generator into a wall outlet to power house wiring — it can electrocute utility workers and bypasses your home's circuit protection. Connect appliances directly to the generator's outlets, or have an electrician install a proper transfer switch.
• Follow the manual on wet weather — many manufacturers allow only a noncombustible generator tent rated for the purpose, or advise waiting until rain or snow passes.
• Refuel safely: turn the generator off and let it cool before refueling; store fuel outside living areas in labeled, non-glass safety containers.
• If you feel dizzy, weak, or nauseous near a running generator, get to fresh air immediately.

Carbon monoxide alarms

Generators, furnaces, fireplaces, and gas appliances all make CO alarms essential winter equipment. Install battery-operated or plug-in CO alarms, test them at least once a month, and replace batteries and aging units on schedule. If an alarm sounds, get everyone — including pets — outside to fresh air immediately and call emergency services. Don't go back in to "check."

Thermostat settings when you're away

Heading out for the holidays? Never turn the heat off completely in winter — keep it at no lower than 55°F, the minimum the Red Cross and major insurers (including Travelers) recommend to keep pipes from freezing. Insurers can deny burst-pipe claims when the heat was left off, treating it as preventable neglect. For longer trips, shut off the main water, drain the lines, and disconnect hoses — plus a smart thermostat with low-temperature alerts and a leak detector near the water heater.

Bottom line

Winter rewards preparation and punishes improvisation: insulate the vulnerable pipes, drip exposed faucets when it's brutally cold, keep the roof deck cold to starve ice dams, give space heaters 3 feet and never leave them unattended, and run generators outdoors at least 20 feet from the house — no exceptions. When the thaw comes, pick up the spring checklist, or follow the full year on our month-by-month maintenance calendar.

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