Winter home maintenance checklist
Updated July 2026
Winter maintenance is different: it's watchfulness, not weekend projects. The house is sealed tight, every heat source is running, and the two killers (frozen pipes and carbon monoxide) escalate in hours, not months. The 14 tasks below are mostly 5–15 minute checks on a monthly or per-storm rhythm, which is exactly the kind of list that slips without a system. Print it for the fridge, or put it on autopilot below.
| Done | Task | Why it matters | Effort | Cost if skipped |
|---|---|---|---|---|
| Know your main water shutoff, and test it | When a pipe bursts you have seconds, not minutes; a seized valve is as bad as no valve | 10 min · DIY | The difference between a mop-up and a $10,000+ claim | |
| Protect pipes in deep cold | Open cabinet doors on exterior-wall plumbing, drip the farthest faucet when temps dive below ~15°F | 5 min per cold snap · DIY | $1,000–5,000 per burst pipe, plus everything it soaks | |
| Change the furnace filter monthly | Peak-season runtime clogs filters fast; airflow is furnace life | 5 min · DIY | Overheat shutdowns, $1,500+ heat-exchanger damage | |
| Watch the roofline for ice dams | Icicles at the gutter line mean meltwater is backing up under the shingles; roof-rake the first 3–4 ft after heavy snow | 30 min after storms · DIY | $1,000–3,000 removal plus stained ceilings | |
| Keep exhaust vents clear of snow | Furnace, dryer and meter vents blocked by drifts push carbon monoxide back inside | 5 min after storms · DIY | CO poisoning, winter’s deadliest maintenance miss | |
| Test smoke and CO detectors monthly | Space heaters, fireplaces and a sealed-up house make winter the peak season for both alarms | 5 min · DIY | Life safety, full stop | |
| Mind the space-heater circuits | One heater per circuit, plugged into the wall (never a power strip); test GFCIs while you’re at it | 10 min · DIY | Space heaters drive ~1,700 house fires a year in the US | |
| Hold indoor humidity at 30–40% | Too dry cracks trim and floors; too humid fogs windows and feeds hidden mold on cold surfaces | 15 min setup · $20 gauge | Cracked hardwood or a spring mold surprise | |
| Check the attic after cold snaps | Frost on the underside of the roof deck means warm moist air is escaping, and will rain down as it melts | 15 min · DIY | Wet insulation, mold, and rot found in April | |
| Check the water heater relief valve and setting | The T&P valve is the tank’s safety fuse; 120°F is the sweet spot for safety and cost | 15 min · DIY | Scalds, or a tank pushed past its safety margin | |
| Clean the range hood filter and dryer duct | Holiday cooking and guest laundry load both up in the highest-fire-risk season | 30 min · DIY | Grease and lint are the top two home-fire fuels | |
| Re-caulk tubs and check grout | The indoor season is when shower water finds every failed seal, and subfloors rot silently | 1 hr · DIY | $1,000s in subfloor repair behind a $6 tube of caulk | |
| Keep walkways clear and salted, check handrails | Falls are winter’s most common injury, and a liability if it’s your mail carrier | Per storm · DIY | ER bills and liability claims | |
| Book spring pros now, at off-season rates | Roofers, painters and landscapers quote better in January than in April, and you get first pick of dates | 30 min of calls | Peak-season pricing and a six-week wait |
If you only do three things
Find and test your main water shutoff, keep CO out (clear vents, working detectors), and monthly furnace filters. The first turns a burst pipe from a catastrophe into a story; the second is the only item on any list here that's about lives, not dollars; the third keeps the machine carrying your whole winter alive.
Paper checklists get done once. OnOtto does this every winter. Add the Winter pack and each task becomes a persistent recurring reminder, assigned across your household and back again next year without you thinking about it.
Put this checklist on autopilot, free for 30 daysFrequently asked questions
What home maintenance should I do in the winter?
Winter maintenance is mostly vigilance, not projects: keep pipes from freezing (know your shutoff, drip faucets in deep cold), keep combustion safe (clear snow off vents, test CO detectors, respect space-heater limits), and watch the roofline for ice dams after storms. The physical work is light (filters, humidity, caulk), but the checks need to be monthly because winter failures escalate in hours.
At what temperature should I worry about pipes freezing?
The commonly used danger line is 20°F outside, sustained; it's lower (~15°F) for well-insulated homes, higher for homes with plumbing in exterior walls, garages or crawlspaces. When a hard freeze is forecast: open cabinets under exterior-wall sinks, let the faucet farthest from the meter drip, and keep the thermostat at 55°F+ even when away.
How do I know if I have an ice dam?
Thick ice building at the gutter line and big icicles are the visible signs; water stains on top-floor ceilings or exterior walls mean it's already inside. Short-term: roof-rake the lower few feet of snow. Long-term: ice dams are an attic problem (air leaks and thin insulation melting the snow from below), which is fall checklist territory.
Is winter a good time for any home projects?
Yes: indoor ones and planning. Interior caulk and grout, paint (with ventilation), decluttering, and above all booking spring contractors at off-season rates. Roofers and painters who are booked six weeks out in May will often quote lower and schedule you first in January.