Most winterizing lists are sorted by room or by whatever the writer thought of first. The cold is not. It arrives in an order: the first hard freeze goes for the water outside, the first cold night tests the furnace, the first week of steady heat is when alarms start to matter, and the first heavy snow finds the roof. This checklist is sorted the same way, so whatever you finish before the weather turns was the urgent part.

Six fronts, in the order the cold reaches them

Outdoor water and pipes. The American Red Cross names the pipes that freeze most often: outdoor hose bibs, sprinkler and pool supply lines, water lines in unheated garages, crawl spaces and cabinets, and pipes along poorly insulated outside walls. Its frozen pipe guidance is the backbone of the first front: take hoses off, drain and store them, close the inside valve that feeds each spigot, then open the spigot and leave it open so any water still in the pipe can expand without splitting it. If you travel in cold weather, the same page says to leave the heat on, set no lower than 55°F.

Heat. The Department of Energy's home energy checklist asks for professional maintenance on a furnace or heat pump every year and a filter that gets cleaned or replaced. The CDC adds a yearly chimney or flue inspection if you burn anything.

Alarms. FEMA's Ready.gov winter page says to install and test smoke alarms and carbon monoxide detectors with battery backups. The CDC's rhythm is a test every month and fresh batteries twice a year.

Drafts. The Energy Department says to go after the biggest leaks first, the ones that whistle on windy days. It adds that the worst culprits are usually not windows and doors but the holes cut for pipes, gaps around chimneys and recessed ceiling lights.

Roof and gutters. The National Weather Service notes that clean gutters let melting roof snow drain through the downspouts. That is not the whole ice dam story. University of Minnesota Extension explains that ice dams begin with heat leaking out of the house, which warms the upper roof while the eaves stay frozen. Its long-term fix is to make the ceiling airtight first and add attic insulation second, so the attic has a line here next to the gutters.

Storm shelf. Ready.gov's test is simple: could you stay home for several days without power? Food, water, flashlights, a radio, spare batteries, medications and pet supplies go on one shelf, and a generator gets its spot outdoors, away from windows, before you ever need it.

How the page works

At the top sits a small painted house inside a dotted red outline, one stroke for every line on the checklist. Seal a line and its stroke turns solid green; the gaps that remain are exactly where the house is still open to the weather.

Beside the house, a card names the line the cold would reach first, the reason behind it and the agency that reason comes from. Tap sealed and the card moves on. Work only from that card and you finish the list in freeze order.

Houses differ, so every built-in line has a not here button: a condo has no gutters, and plenty of homes have no chimney or sprinkler system. Crossing a line off removes its stroke, which means the outline can actually close for the house you live in. A front folds shut once nothing in it is exposed, and five lines of your own cover the jobs no national list knows about, like a rain barrel or a plow contract.

What the guidance does and does not say

You will not find a promised percentage off your heating bill on this page. Savings depend on the house, the fuel and the climate, and a number that fits one home misleads the next. The only temperature on the sheet is the Red Cross figure for an empty house.

Two pieces of advice look like they clash and do not. The Energy Department suggests letting a programmable thermostat set the heat back at night. The Red Cross says that in severe cold you should hold the thermostat steady around the clock and accept a higher bill to protect the pipes. One is for ordinary nights, the other for dangerous ones, when the Red Cross also suggests shutting the garage door if water lines run through the garage, opening the cabinet doors under sinks, and letting a faucet fed by exposed pipes run at a trickle.

Furnace service, chimney inspection and anything on the roof belong to professionals. The Minnesota extension page is blunt that people working on winter roofs get hurt.

When to use it

Start a few weekends before your area's usual first freeze and take one front per weekend, outdoor water first. Renters can seal the alarms, the drafts and the storm shelf, cross off the rest, and pass the pipe and furnace lines to the landlord. If the work is shared, a Chore Chart splits the fronts between people, and the Home Routines Journal is a good home for the monthly alarm test once winter settles in. Fall is not only chores, either: The Fall Bucket List holds the half of the season you will actually remember.