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, 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 — 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.