Winter Home Maintenance Checklist

Exterior

1. Watch for ice dams — Icicles and ice ridges at the eaves mean heat is escaping into your attic, melting snow that refreezes at the cold roof edge and backs water up under the shingles. Roof rakes and heat cables treat the symptom; the actual fix is more attic insulation and better ventilation. Check what you need with the attic insulation calculator and see typical pricing in our insulation cost guide.
2. Clear snow loads from flat and low-slope roofs — Porch roofs, carports, and sheds with shallow pitches can't shed snow the way a steep roof does. Wet snow weighs 12–20 lbs per cubic foot, so a two-foot accumulation puts serious stress on light framing. Use a roof rake from the ground after major storms — never climb onto a snow-covered roof.
3. Check the garage door seal — Inspect the rubber bottom seal and side weatherstripping for cracks and gaps. A failed seal lets in freezing air, snowmelt, and rodents, and if the garage shares a wall with living space it drags down the whole house's efficiency. Replacement bottom seals cost $20–$50 and install in under an hour.
4. Salt safely near concrete — Rock salt (sodium chloride) accelerates freeze-thaw damage and causes spalling — the flaking, pitted surface you see on older driveways and steps. Use calcium magnesium acetate or plain sand near concrete, and never de-ice concrete poured within the last year. Already seeing spalling? Estimate spring resurfacing or replacement with the concrete calculator.

Interior

5. Prevent frozen pipes — On nights below about 20°F, open cabinet doors under sinks on exterior walls so warm air reaches the plumbing, and let vulnerable faucets drip — moving water resists freezing. Insulate exposed runs in crawl spaces, garages, and rim-joist areas with foam sleeves ($1–$2 per foot). A single burst pipe averages $5,000+ in water damage.
6. Manage indoor humidity — Target 30–50%. Too dry causes cracked trim, static, and irritated sinuses; too damp causes window condensation and mold. A $10 hygrometer tells you where you stand. If a basement or bedroom stays damp even in winter, size a unit with the dehumidifier calculator.
7. Hunt down drafts — On a windy day, move a lit incense stick or damp hand around outlets, window sashes, door frames, and attic hatches. Seal what you find with outlet gaskets, rope caulk, and door sweeps. Air leaks account for 25–40% of heating costs in a typical older home, and winter is when they're easiest to feel.
8. Monitor basement moisture — Snowmelt against the foundation finds every weakness. Watch for damp walls, efflorescence (white mineral streaks), and musty smells, especially during thaws. Persistent water calls for grading or drainage fixes — see the french drain calculator — and any finishing plans should wait until it's dry; our basement finishing guide covers moisture testing first.

Systems

9. Check the furnace filter monthly — Winter is peak runtime, and a clogged filter makes the furnace work harder, overheat, and short-cycle — the leading preventable cause of mid-winter failures. Hold the filter up to a light: can't see through it, change it. If your furnace is limping through its second decade, get ahead of replacement pricing with our HVAC cost guide.
10. Test the sump pump — Mid-winter thaws and early spring melt arrive fast. Pour a bucket of water into the pit and confirm the pump kicks on, evacuates the water, and shuts off. Check that the discharge line outside isn't frozen or blocked by snow — a blocked line burns out the motor exactly when you need it.
11. Inspect the attic for leaks and condensation — Once or twice a winter, look for wet or compressed insulation, frost on the underside of the roof deck, and water stains around vents and chimneys. Frost buildup means warm moist air is leaking up from the house — an air-sealing problem that quietly rots roof sheathing.

Off-Season Planning

12. Plan next year's projects — Winter is when contractors are hungriest: quotes for decks, fences, roofs, and patios come in noticeably cheaper in January than in May, and you get first pick of the spring schedule. Spec your project with our free calculators, read the relevant step-by-step guides, and collect two or three bids before the season rush.