My Fall Checklist: Getting the House Ready Before the First Freeze

I do my house winterizing every fall, right around the equinox, when the temperature first starts sliding and there's still time to fix things in decent weather. I learned the hard way that February is the wrong month to discover your furnace won't light or that cold air is pouring in around the back door. So I keep a checklist and I work it before the first real freeze. Here's what's on it.

The reason I anchor it to the equinox is that the work is genuinely easier in mild weather. Caulk cures better, I'm not on a ladder in the wind, and the trades aren't yet slammed with emergency calls. By the time the first hard frost arrives, I want every item on this list already crossed off — not half-started with cold fingers.

Service the heating system first

Heat is the thing I cannot afford to have fail in January, so it goes first. I call an HVAC pro to inspect the furnace and clean the ducts — the kind of vital inspection I'm not equipped to do myself. I keep a stack of furnace filters on hand because they need swapping every month through the season, and I clear away anything flammable that's crept near the furnace over the summer. A programmable thermostat is a worthwhile upgrade here — it trims the bill without me thinking about it. If you run a hot-water radiator, crack the valves slightly and close them the moment water appears.

While the pro is there, I ask the questions I can't answer myself: how many seasons does the unit likely have left, is the heat exchanger sound, is carbon monoxide a concern. A working carbon monoxide detector on every level is non-negotiable in a house that's about to be sealed up and running combustion heat all winter — it's the cheapest life-safety device in the house and the one people forget to test.

Seal the gaps where cold sneaks in

Next I walk the exterior looking for crevice cracks and any spot where pipes pass through the wall without a proper seal. Those are open invitations for cold air and freezing pipes, so I seal anything I find fast.

For doors, weather stripping stops the draft cold. For windows, I caulk the gaps with a tube of window caulk, and if there's a basement, I cover the window wells with plastic shields. I put the summer screens away and switch to glass — storm windows if you have them. None of this is glamorous, but sealing the envelope is the single biggest thing standing between you and a brutal heating bill.

Ready the fireplace and chimney

If I'm going to use the fireplace, it gets prepped before the first fire. A chimney cap goes on top to keep birds and rodents out. If it's been a while since the flue was cleaned, I call someone to clear the creosote and soot — that buildup is a genuine fire hazard, not a maybe. I stock chopped firewood somewhere dry, and I check that the damper still opens and closes properly so I'm not heating the outdoors all winter.

Insulate the attic and check the roof

If winters here drop below freezing, attic insulation earns its keep. Adding attic insulation keeps warm air from sneaking up to the roof deck, which is what causes ice dams — the kind that back water up under your shingles and into the ceiling. While I'm thinking about the roof, I inspect for worn or missing shingles and replace them while the weather's still cooperating; the whole point is making sure water can't find a way in once the snow piles up.

Gutters get cleaned out too. Clogged gutters can't drain meltwater, and standing water that freezes turns into ice dams and damaged fascia. A few hours with a gutter cleaning tool in the fall saves a much worse problem in the thaw.

Handle the outdoor odds and ends

A few small jobs round out the list, and skipping them is how I've ruined gear in the past. I disconnect the garden hoses, drain them, and shut off the exterior faucets so the spigots don't freeze and split — a faucet cover on each one is cheap insurance for the nights I forget how cold it's about to get. I move the patio furniture and grill under cover or wrap them, and I make sure anything that can hold water gets tipped out so it isn't a block of ice by December. The mower gets its last cut and a dose of fuel stabilizer, and the snow shovel comes out of the back of the shed where I buried it in April. None of this is hard; it's just the kind of thing that's miserable to do for the first time during the first storm.

Keep the list going

This isn't every possible step — there's always more you can do — but it covers the ones that matter most. The whole aim is simple: make sure the house stays comfortable and safe inside even when the temperature outside bottoms out. I keep my checklist year to year and just work down it each fall. Knock these out before the first freeze and winter stays where it belongs — outside.