Winter Home Maintenance Checklist: What to Watch Until Spring
by the Berry team · Updated
In winter, keep changing the HVAC filter, test smoke and CO alarms, keep exterior vents and downspouts clear, and check the attic and under-sink pipes for leaks after every cold snap. Winter is mostly about watching for small problems, like ice at the roof edge or condensation on windows, and dealing with them before they turn into water damage.
The winter checklist at a glance
Most winter jobs are quick checks rather than projects. The pro column is what it costs when you need help or when a check turns up a problem.
| Task | What it prevents | DIY cost | Pro cost |
|---|---|---|---|
| Change the HVAC filter | Restricted airflow that strains heating equipment while it runs hardest. | DIY$5-$40 | ProUsually included in a service visit |
| Test smoke and CO alarms | Dead alarms during the months when heaters, fireplaces, and generators run most. | DIY$5-$30 for batteries | ProRarely needed |
| Keep exterior vents clear | Blocked exhaust or intake vents that can shut down heating or push exhaust back inside. | DIY$0 | ProNot needed |
| Watch for ice dams | Meltwater backing up under shingles and leaking into ceilings and walls. | DIY$30-$80 for a roof rake | Pro$300-$2,000 for ice dam removal |
| Check the attic after cold snaps | Frost, damp insulation, or roof leaks that go unnoticed until a ceiling stains. | DIY$0 | ProFree to $300 for a roof inspection |
| Seal drafts | Cold spots, higher heating bills, and condensation where warm air meets cold surfaces. | DIY$20-$60 | Pro$150-$400 for a handyman visit |
| Service a generator (if you have one) | A generator that will not start during an outage. | DIY$20-$50 for oil and a spark plug | Pro$150-$300 |
Ranges are typical US prices and vary with your region, your home, and the season. A pro quote for your exact job beats any range.
Do these everywhere
Winter maintenance is lighter than fall. Most of it is checking a few spots once a month and after any cold snap or storm.
Keep up with the HVAC filter. If your system uses a filter, heating season is when it loads up fastest. Check it monthly and change it when it looks gray, or at least every 1 to 3 months for a standard 1-inch filter.
Test smoke and CO alarms. Press the test button on each one. If you have gas appliances, a fireplace, or an attached garage, working CO alarms near every sleeping area are the most important thing on this list.
Keep exterior vents clear. Walk around the outside and make sure the dryer vent, any heating exhaust or intake pipes, and the gas meter are not blocked by snow, leaves, or plants. If you have a high-efficiency furnace that vents through a side wall with plastic pipes, those pipes need clear space around them.
Look under sinks and around the water heater. After a cold night, check for drips under kitchen and bathroom sinks on outside walls. If you have a tank water heater, glance at the base for water or rust. Small leaks found early are cheap.
Watch the windows. A little condensation on cold glass is normal. Water running down the glass and pooling on sills, or mold on window frames, means indoor humidity is running high. Run bath and kitchen fans longer and see the humid climate section below.
Check ceilings near exterior walls. New stains or bubbling paint near the top of exterior walls can mean an ice dam, a roof leak, or condensation in the attic. Catching it the week it starts makes a big difference.
Keep downspouts flowing. If you have gutters, make sure downspouts are not frozen shut or blocked. Meltwater that cannot drain ends up against the foundation or refreezes on walkways.
Climate section
If you get hard freezes
If your winters bring regular nights in the low 20s or below, or real snow, these matter most. For the night before a big cold snap, use first-freeze prep.
Watch for ice dams. Large icicles along the roof edge and a thick ridge of ice at the gutters are warning signs. Warm air leaking into the attic melts snow on the roof, and the water refreezes at the cold edge. A roof rake used from the ground to pull the bottom few feet of snow off helps. Climbing onto an icy roof is not worth the risk.
Mind the snow load. Most roofs handle normal snow without trouble. If you get unusually heavy or wet snow, and especially if you have a flat or low-slope roof, watch for sagging, new cracks in interior drywall, or doors that suddenly stick. Those are reasons to have the snow removed by a pro.
Keep outdoor faucets drained. Make sure no hose has been reattached since fall. If you have not winterized yet, see how to winterize outdoor faucets.
Go easy on deicer. Rock salt can damage concrete, especially new concrete in its first winter, and harm plants along walkways. Sand or a deicer labeled safe for concrete is gentler.
Use a generator safely (if you have one). Never run a portable generator in the house, garage, basement, or near an open window, even with the door open. Carbon monoxide builds up fast. Keep it outside, well away from the house, with the exhaust pointed away from doors and windows.
Climate section
If you're in a humid climate
Mild, damp winters bring their own problems. Condensation and mildew are more common than ice, and pipes in homes built for warm weather are less protected when a freeze does come.
Control condensation. Run bathroom fans during and for 20 to 30 minutes after showers. If you see mildew on window frames or in closets on exterior walls, a hygrometer ($10-$20) will tell you whether indoor humidity is running high.
Do not ignore the occasional freeze. If hard freezes are rare where you live, pipes in crawl spaces and exterior walls may have little insulation. Treat any forecast in the low 20s seriously and use first-freeze prep.
Check the crawl space (if you have one). Winter rain can leave standing water under the house. Look for puddles, a torn vapor barrier, or insulation hanging down. Moisture there feeds mold and rot.
Know what a heat pump defrost looks like (if you have one). In cold, damp weather, a heat pump periodically runs a defrost cycle and may give off steam outside. That is normal. A unit encased in solid ice that does not clear is not, and is worth a service call.
Climate section
If you're in storm or tornado country
Tornadoes can and do happen in winter in parts of the South, and ice storms bring down limbs and power lines. See storm and tornado prep for the full list.
Keep the weather radio and flashlights ready. Winter storms often hit at night. Fresh batteries, a charged power bank, and a weather radio mean you hear a warning even if the power or cell service goes out.
Plan for a multi-day outage. Ice storms can knock out power for days. Have water, blankets, and food that does not need cooking. Never use a grill, camp stove, or gas oven to heat the house.
Look up after ice storms. Check for cracked or hanging limbs over the roof, driveway, and power lines. Limbs touching power lines are a job for the utility or a tree service, not a ladder.
Know your shelter spot. The lowest floor, an interior room, away from windows. Make sure everyone in the house knows where it is before the season gets busy.
When the weather turns, the spring checklist picks up where this one leaves off.
When to call a pro
- You see water stains on ceilings or walls, or water dripping inside during a thaw.
- Ice dams keep forming every winter. An insulation or air sealing contractor can fix the cause.
- The roof sags, interior drywall cracks, or doors start sticking after heavy snow.
- Your heat stops working, cycles on and off, or a CO alarm goes off. For a CO alarm, get everyone outside first and call 911 or the gas company.
- A heat pump outdoor unit stays caked in ice for hours.
What makes it worse if you wait
- An ice dam leak that starts small can soak attic insulation and drywall for weeks before the stain shows.
- Condensation that runs down windows every morning eventually rots sills and frames.
- A drip under a sink after a cold snap can mean a pipe that cracked. It will not seal itself.
- Heating problems tend to get worse in the coldest stretch of winter, when service calls are hardest to book.
Common questions
What home maintenance should I do in winter?
Change the HVAC filter monthly or as needed, test smoke and CO alarms, keep exterior vents clear, check under sinks and in the attic after cold snaps, and watch for ice dams and window condensation. Most of it is quick checks rather than projects.
How do I prevent ice dams?
Ice dams form when heat escaping into the attic melts snow on the roof. The lasting fix is sealing air leaks into the attic and adding insulation where it is thin. In the moment, a roof rake used from the ground to clear the bottom few feet of snow helps.
Is condensation on windows in winter a problem?
A little fog on cold glass in the morning is normal. Water that runs down and pools on the sill, or mold on the frame, means indoor humidity is too high for your windows. Run exhaust fans longer and consider a hygrometer to check humidity levels.
How often should I change my furnace filter in winter?
Check it monthly during heating season. A standard 1-inch filter usually needs changing every 1 to 3 months, and more often if you have pets or someone in the house has allergies. Thicker media filters last longer.
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Keep reading
- How to Prepare Your House for a Hard FreezeThe night-before list for a hard freeze: which faucets to drip, which cabinets to open, what to set the thermostat to, and what to do if a pipe freezes.
- How to Winterize Outdoor Faucets (and What a Frozen One Costs)How to shut off and drain outdoor faucets before a freeze, how to tell if yours are frost-free, and what a split faucet or pipe costs to fix.
- How to Prepare Your House for a Tornado or Severe StormWhat to do before storm season, the day a watch is issued, and after the storm passes, with DIY vs pro costs for trees, tarps, generators, and sump backups.
- Seasonal Home Maintenance: What to Do Each Season and What It CostsThe full seasonal guide hub.