The first hard freeze shouldn't be your building inspection.

NOAA's winter outlook, released in mid-October, favors a warmer-than-average December through February across much of the northern United States, thanks to a strong El Niño. That's good news for heating bills. It is not a hall pass for the winter walk. A seasonal outlook describes three months of averages, and pipes don't freeze on averages. They freeze on the one clear, windy night in January when the temperature drops twenty degrees and the line in the north wall finds out it never got insulated.

That one night is expensive. The Insurance Information Institute puts water damage and freezing at 22.6% of homeowners insurance losses in 2023, with an average claim of about $15,400 between 2019 and 2023. Roughly one in 67 insured homes files one every year. An apartment building has more pipe, more roof, and more units where nobody is looking, so the math only goes one direction from there.

Do the walk in daylight, before the first hard freeze, with the building's plans or last year's notes in hand. Record each condition as its own item, with a photo and an exact location. “Check the boiler room” is a reminder. “Pipe insulation missing on the cold-water line behind the boiler, north wall” is work someone can do without calling you to ask which boiler.

An occupied unit comes with a free, built-in leak detector: the person who lives there. A vacant unit has nobody, and a slow leak can run for days before it introduces itself through the downstairs neighbor's ceiling. Insurer guidance is consistent: keep the heat at 55°F or higher, open cabinet doors on exterior walls so warm air reaches the pipes, and have someone check the property regularly. For longer vacancies, consider shutting off and draining the water.

Your coverage can depend on it. Many property policies expect the building to be heated and limit coverage once it has been vacant for a set period, often 60 days. Read your policy, ask your broker, and keep a simple record of each check: the date, the thermostat reading, and a photo. If a pipe does burst, that record answers the adjuster's first questions before they get to the ones with long pauses in them.

Tenants, staff, and cleaners walk past the problem long before your next inspection. They notice the faucet that started dripping, the radiator that stays cold, the draft under the stairwell door, the water stain on the hallway ceiling that's slowly taking the shape of Ohio. Most of them never report it, because reporting means finding a phone number, calling during office hours, or downloading an app they'll use exactly once and then resent.

Make reporting easier than ignoring it. A QR code posted in hallways, laundry rooms, and mechanical areas lets anyone report from their phone in about 30 seconds: a photo, a circle around the problem, and a note about where it is. In SitePunch, those reports wait in one inbox. You accept the real ones as items, dismiss the duplicates, and send the right vendor a link. Nothing goes out until you decide it should, so three reports of the same drip become one work order, not three plumbers.

A vendor saying “done” is an update, not a repair record. Ask for an after-photo on the original item: the insulated pipe, the cleared downspout, the new door sweep. Then check it or send it back with a reason. The point isn't distrust. It's that in February, when a tenant asks whether anyone ever fixed the leak above their bathroom, the answer is one tap away instead of somewhere in a text thread between a parts quote and a thumbs-up emoji.

Keep the list after winter ends. The items that came back, like the same ceiling stain twice or the hose bib that froze again despite everyone's promises, are the start of next year's walk. Sometimes they're also the roof project the building has been politely ignoring.