As October turns colder in Rochester, homes start talking. For newcomers who moved here from warmer places, some of the sounds can be surprising. Most have ordinary explanations.
Before tracking one down, note when it happens, where it seems to come from, and what else was going on.
Why Homes Crack and Pop in the Cold
Wood framing, siding, and fasteners contract as temperatures drop. On very cold winter nights, loud cracks from the roof or walls are common and can startle first-time Minnesota homeowners. Floors creak more as the furnace dries the air.
Plumbing Noises
A bang after the washer shuts off is often water hammer. Dripping or running water sounds near exterior walls in winter can signal ice dams or a pipe at risk of freezing. Check your meter if you hear water when nothing is on.
Furnace and Boiler Sounds
Furnaces click, hum, and whoosh. Boilers and in-floor heat can gurgle when air is trapped. New grinding, squealing, or banging is worth a call. If you smell gas, leave and call your gas utility or 911 from outside. If a carbon monoxide alarm sounds, get everyone out.
Wind Whistles
Prairie wind can whistle through gaps around windows, doors, and attic hatches. Rattling often comes from dryer vents and loose gutters.
Mice and Squirrels
Mice move indoors as temperatures drop and are active at night. Squirrels are daytime visitors in attics. Call a licensed pest or wildlife professional.
What to Tell the Professional
Describe the sound, where and when you hear it, and what else is running. "Water dripping inside the wall above the front window after it snows" tells a contractor exactly where to look.
If you'd like a recommendation for a local plumber, heating technician, roofer, or pest professional, just ask. We're happy to share names we know.
Frequently Asked Questions
Why does my house crack loudly on cold Minnesota nights?
Framing and siding contract quickly in extreme cold. It's usually normal.
What does an ice dam sound like?
You may hear dripping inside walls or near windows after snow.
Why do floors creak more in winter?
Heated indoor air is drier, so wood shrinks slightly.
Why does my boiler gurgle?
Air trapped in the system is a common cause.
Why are mice more noticeable in fall?
They move indoors seeking warmth.
