Winter Checklist
Winter is the safety season. If you prepped right in fall, winter is monitoring and knowing your emergency plan. If you skipped fall prep, catch these critical items now.
Monitor roof for ice dams
Remove heavy snow from roof after major storms
Use ice melt on walks, NOT salt on concrete
Keep thermostat above 62°F always — even when away
Open cabinet doors under sinks on exterior walls
Drip exterior-wall faucets during deep freezes
Know where your main water shutoff is
Replace furnace filter monthly in winter
Check for basement moisture during freeze-thaw
Review home insurance annually
Insulate Exposed Pipes Before a Freeze
Foam pipe insulation costs about $1 per linear foot and takes an afternoon to install. A burst pipe from freezing can cause $5,000–$50,000 in water damage. This is the best ROI task in home maintenance.
Identify all at-risk pipe runs
Walk your basement and crawl spaces with a flashlight noting every exposed pipe. Check under kitchen and bathroom sinks on exterior walls — open the cabinet and feel the wall behind the pipes. In garages, look for water supply lines to a utility sink or hose bibb. Mark at-risk sections with tape before you make a hardware store run.
Choose the right insulation product
Foam pipe insulation sleeves (pre-slit polyethylene tubes) work for most indoor pipes. Buy the size matching your pipe diameter — common sizes are ½" and ¾" ID. For areas that get genuinely cold (unheated crawl spaces that drop below 20°F), use pipe heat tape (self-regulating electric cable) under foam insulation for dual protection.
Install foam insulation sleeves
The sleeves are pre-slit lengthwise — simply open them along the slit and snap them over the pipe. For corners and T-joints, use a utility knife to cut mitered sections. Close all seams and joints with foil HVAC tape (not duct tape, which dries out). Overlap joints by 2" and tape over every seam.
Insulate hose bibb shutoffs
Outdoor hose bibbs (spigots) should have an interior shutoff valve — close it and drain the line by opening the spigot outside briefly to release trapped water. If there is no interior shutoff, install a vacuum-breaker frost-free hose bibb ($25–$40) before next winter season. Foam outdoor spigot covers add another layer of protection.
Know Your Emergency Shutoffs
When a pipe bursts at 2 AM, you have seconds before a trickle becomes a flood. Every adult in the home needs to know the location of the main water shutoff, gas shutoff, and electrical panel — before an emergency.
Find and test the main water shutoff
Usually located where the water line enters the house — near the front foundation wall, in the basement, utility room, or crawl space. It's either a gate valve (round wheel) or a ball valve (straight lever). Turn it off completely, then check a faucet to confirm no flow. Turn it back on slowly. If the valve is stuck or won't fully stop flow, call a plumber to replace it before winter.
Locate individual fixture shutoffs
Every toilet and sink has a dedicated shutoff valve — typically an oval or slot valve under the toilet tank or under the sink. These let you isolate a problem at the fixture without cutting water to the whole house. Turn each one off and back on once per year to prevent them from seizing (a stuck valve is useless in an emergency).
Find the gas main shutoff
The gas main shutoff is on the meter pipe, typically outside where the service line enters the house. It requires a crescent wrench or gas shut-off tool — the valve is a square or rectangular stem that turns 90° perpendicular to the pipe to close. Only close the gas main if you smell gas or suspect a leak. Once off, the gas company must restore service. Know the 24-hour emergency number for your gas provider.
Label your electrical panel
Your main electrical panel has individual breakers labeled by circuit and a main shutoff — typically a large double-breaker at the top. Walk the house and verify every breaker label is accurate (many panels have incorrect, old, or blank labels). Use a circuit finder tool ($20–$30) or the trip-and-test method. Make a laminated legend and tape it inside the panel door.
Prevent Ice Dams
Ice dams form when attic heat melts rooftop snow, which refreezes at the cold eave. Water backs up under shingles into the house. The only real fix is addressing the root cause: attic heat loss.
Understand what causes ice dams
Warm air escaping through your ceiling heats the attic, which warms the roof deck and melts snow above it. The snowmelt runs down to the cold eave overhang, which has no heat below it, and freezes. As the ice dam builds, water has nowhere to go and backs up under shingles. The attic should be as cold as the outside air — if it's warm, warm air is leaking in.
Check your attic insulation level
Most older homes are under-insulated. Current recommendation is R-49 to R-60 in cold climates — that's about 14–17 inches of blown cellulose or 16–19 inches of blown fiberglass. Open the attic hatch and measure: if you can see the ceiling joists above the insulation, you're under-insulated. Adding insulation is the single most impactful fix.
Seal attic air bypasses first
Adding insulation over existing air leaks is ineffective — warm air will bypass the insulation and still heat the roof deck. Before adding insulation, seal all penetrations where air can rise into the attic: ceiling light fixtures, attic hatch perimeter, plumbing vents, knee walls, and any area where drywall meets framing at the eaves. Spray foam and rigid foam board are effective sealants.
Verify attic ventilation
Good insulation needs to be paired with good ventilation. Soffit vents (at the eave) and a ridge vent (at the peak) work together — cold outside air enters at the soffit, sweeps under the insulation, and exhausts at the ridge, keeping the entire roof deck cold and uniform. Make sure soffit vents aren't blocked by insulation touching the eave — use insulation baffles (rafter vents) to maintain an airway.
Test Smoke and CO Detectors
CO poisoning risk rises sharply in winter when furnaces, fireplaces, and gas ranges run continuously. This 15-minute test costs nothing and directly saves lives — do it at the start of every heating season.
Test every detector in the house
Press and hold the test button on each smoke and CO detector for 3–5 seconds. A working detector will emit a loud alarm. If you get a weak chirp, low sound, or no response, the detector needs a new battery or full replacement. Test all units — including basement and garage units that get overlooked.
Replace batteries in all units
Even if a detector tested fine, replace the battery at the start of each heating season anyway — it's a $3 insurance policy. 9V alkaline batteries power most standalone detectors. Some units have sealed 10-year lithium battery packs — if those units are over 10 years old, replace the entire unit. Write the installation date in marker on the inside of the cover.
Check detector placement
Smoke detectors should be on every level of the home, inside and outside every sleeping area. CO detectors should be on every level (CO is roughly the same density as air — placement at any height works) and within 10 feet of any sleeping area. The kitchen should have a smoke detector but no CO detector within 15 feet of a gas range — cooking vapors cause nuisance alarms.
Know what to do when the CO alarm sounds
A CO alarm is a get-out-now emergency — do not try to find the source. Exit the home immediately, leaving doors open behind you. Call 9-1-1 from outside. Do not re-enter until emergency responders clear the building. CO is colorless and odorless — you cannot smell it. Common sources: blocked furnace flue, cracked heat exchanger, running vehicles in attached garage, gas range left on.