Winter Home Maintenance Checklist

Quick overview

Winter maintenance is mostly monitoring and small adjustments rather than large projects. The biggest risks — frozen and burst pipes, ice dam damage, and carbon monoxide from heating equipment — are all preventable with consistent attention. Most of the tasks below take only minutes; the goal is to check in regularly rather than wait for a problem to appear.

Recommended frequency

This checklist covers tasks spread across the winter season. Some (furnace filter, detector test) are monthly. Others (pipe risk checks, sump pump) are triggered by weather events. Review the full checklist once at the start of winter, then follow the monthly rhythm through March or until sustained freezing temperatures have passed in your region.

See the monthly home maintenance checklist for the recurring items that apply year-round.

Tools and materials

• Replacement HVAC filters (stock 2–3 at the start of winter)
• Digital hygrometer (to monitor indoor humidity)
• Foam pipe insulation or heat tape for vulnerable pipes
• Roof rake with an extendable handle (for snow removal from the ground)
• Flashlight
• Replacement batteries for smoke and CO detectors
• Small emergency supply kit: bottled water, flashlight, battery-powered radio, extra blankets, three-day food supply

Safety considerations

Winter maintenance has a higher CO risk than other seasons because heating equipment runs continuously. Key points:

• Never use gas ranges, outdoor grills, or generators indoors as heat sources. Each produces CO. A portable generator must run outside, at least 20 feet from any door, window, or vent.
• Do not get on an icy or snow-covered roof. Snow conceals hazards and ice dramatically reduces traction. Use a roof rake from the ground.
• Space heaters. If you use supplemental electric space heaters, keep them 3 feet from flammable materials, never run them unattended overnight, and confirm they have tip-over shutoffs.

Maintenance checklist

Frozen pipe prevention

• Identify vulnerable pipes: supply lines in unheated crawl spaces, garages, exterior walls, and near uninsulated rim joists
• Insulate vulnerable pipes with foam pipe insulation if not already done
• Keep thermostat at or above 55°F even when away or on vacation
• Open cabinet doors under sinks on exterior walls during extreme cold spells to allow warm air circulation
• Let cold-side faucets drip very slightly on the coldest nights if pipes in that run have a history of freezing
• Know the location of your main water shutoff so you can act quickly if a pipe does burst

Humidity and condensation

• Monitor indoor humidity with a hygrometer; target 30–50% relative humidity
• If humidity runs above 50%, reduce it by running bath and kitchen exhaust fans longer or by adjusting a whole-house humidifier downward
• Inspect windows for condensation on the interior glass — consistent moisture indicates humidity is too high or glazing needs improvement
• Check for frost on interior walls in corners and closets on exterior walls — this indicates air leaks and insufficient insulation

Heating system

• Replace the HVAC filter on schedule (check monthly; many call for replacement every 1–3 months depending on filter type and household conditions)
• Keep supply and return registers clear of furniture, rugs, and drapes
• Check that the furnace's combustion air intake (a PVC pipe on newer high-efficiency furnaces) is not buried in snow or blocked with ice
• Listen for unusual sounds during heating cycles: banging, screeching, or frequent short cycling all warrant a service call

Ice dams and roof

• After significant snowfall, use a roof rake from the ground to pull snow off the lower 3–4 feet of the roof — removing the snow before it melts and refreezes prevents many ice dams
• Inspect the attic after a heavy warm-up-then-freeze event for signs of water intrusion (staining, frost on the underside of sheathing)
• Check gutters and downspouts for large ice formations — a solid ice column in a downspout can cause water to back up under shingles

Sump pump

• Confirm the sump pit is not frozen and the float moves freely
• Check that the discharge line is not blocked with ice or snow at its outlet
• Pour a small amount of water into the sump pit to confirm the pump activates and discharges properly

Safety devices and emergency prep

• Test smoke detectors and CO detectors monthly (monthly is the CPSC recommendation; winter is the highest-risk season for CO)
• Confirm you have fresh batteries in battery-powered units
• Review your home emergency plan: where is the main water shutoff? The gas shutoff? Where will your family go if the power is out for more than 24 hours?
• Keep a basic emergency kit accessible: flashlights, batteries, bottled water (one gallon per person per day for three days), a battery radio, and extra blankets

Step-by-step safe tasks

Checking and insulating a vulnerable pipe run

1. Locate the pipe (e.g., a cold-water supply line running through an unheated crawl space or along an exterior garage wall).
2. If it is not insulated, measure the pipe diameter and purchase split-foam pipe insulation of the matching size.
3. Slip the insulation over the pipe, pressing the split closed. Use tape at seams and at any fittings.
4. For extreme cold or pipes with a history of freezing, self-regulating electric heat tape is an alternative — follow the manufacturer's instructions for installation and never overlap the tape on itself.
5. Do not insulate the exterior of pipes that run through a heated wall — you want heat from the living space to reach them.

Using a roof rake safely

1. Wait until after the snowfall has ended and daylight is good.
2. Stand on the ground at a distance from the eave — at least 6 feet — so that sliding snow does not fall on you.
3. Hook the roof rake blade into the snow at the upper edge of the area you are clearing (the lower 3–4 feet of roof slope is the priority).
4. Pull toward yourself in firm strokes. Work in sections from one side of the roof to the other.
5. Do not chip at ice formations — you will damage shingles. Only remove loose snow.

Tasks best left to a professional

• Ice dam water damage repair. If water has already entered the attic or walls from an ice dam, the underlying damage (insulation, sheathing, ceiling) needs assessment and repair by a contractor.
• Adding attic insulation. The long-term solution to ice dams is proper attic insulation and ventilation. Assessment and air sealing at the attic floor is most accurately done by an energy auditor or insulation contractor.
• Furnace repairs. Any issue with burner performance, a cracked heat exchanger, or a blocked flue must be handled by a licensed HVAC technician. These involve combustion gas and CO risk.
• Burst pipe repair. Shut off the main water supply immediately if a pipe bursts, then call a licensed plumber. The cleanup from water damage may also require a water mitigation company.

Common mistakes

• Leaving the thermostat too low when away. Many homeowners drop to 50°F or below when on vacation. That is below the safe threshold in many climates, especially for pipes in exterior walls. Keep it at or above 55°F.
• Forgetting the combustion air intake. High-efficiency furnaces draw combustion air from a pipe at the side of the house. A snowdrift over that pipe causes the furnace to shut off on a fault — usually late at night during a storm.
• Ignoring condensation. Interior window condensation is easy to dismiss. Left unaddressed, it consistently produces mold growth, rotted window frames, and damaged drywall.
• Silencing CO detectors. If a CO detector sounds, it is not a nuisance alarm — evacuate and call 911. CO detectors have very few false positives.

Review the home maintenance budget calculator to account for winter emergency repairs in your annual planning.