What's on a cabin maintenance checklist?
Updated August 2026
A seasonal cabin lives or dies on two rituals: a full plumbing drain-down when you close and a careful flush-and-inspect when you open. Closing means shutting the water, draining the lines, water heater, and pressure tank, and pouring nontoxic RV antifreeze into every trap and toilet so nothing left behind can freeze and split. Opening means flushing the lines for 10 to 15 minutes, shock-chlorinating the well, and hunting for the rodent and moisture damage that empty, unheated cabins collect over a winter.
| Task | Interval | Effort |
|---|---|---|
| Shut off water at the main or well pump | Closing | 5 min · DIY |
| Drain the lines, water heater, and pressure tank | Closing | 1–2 hr · DIY |
| Pour RV antifreeze in every trap, toilet, and drain | Closing | 30 min · DIY |
| Leave the drained water heater switched off | Closing | 5 min · DIY |
| Task | Interval | Effort |
|---|---|---|
| Seal gaps and vents against rodents | Closing | 1 hr · DIY |
| Remove all food; store soft goods in sealed bins | Closing | 30 min · DIY |
| Unplug appliances; shut off propane at the tank | Closing | 15 min · DIY |
| Prop the fridge door open with baking soda inside | Closing | 5 min · DIY |
| Task | Interval | Effort |
|---|---|---|
| Flush the lines to clear antifreeze | Opening | 20 min · DIY |
| Shock-chlorinate and test the well water | Opening | 1 hr · DIY |
| Check for rodent nests, roof leaks, and mold | Opening | 30 min · DIY |
| Test the water heater, HVAC, alarms, and GFCIs | Opening | 30 min · DIY |
What neglect costs
An unheated cabin collects two kinds of damage all winter. Water left in a line freezes, expands, and splits the pipe, so the failure only reveals itself when you re-pressurize in spring and a wall starts pouring. Meanwhile rodents move into the quiet, chewing wiring and insulation and nesting in the furnace and mattresses. A pro re-pipe after a bad freeze can run $2,000 to 6,000, and rodent-chewed wiring is both a repair and a fire risk. A proper drain-down and pest seal is a single fall afternoon.
Leave these to a pro
If you are not confident draining a system, a plumber will winterize the cabin, water heater, and pressure tank and blow the lines out with air for about $150 to 400, which is the surest defense against a freeze split. On opening, a well should be shock-chlorinated and the water tested for bacteria before you drink it, roughly $50 to 150 for a lab test. A pest-control exclusion visit seals the entry points you will miss. This routine is the cabin cousin of the standard home winterizing checklist.
This whole checklist ships as reminders in OnOtto: every task above, on the right schedule for your home, snooze-proof.
Load this checklist as remindersFrequently asked questions
How do I winterize a cabin's plumbing for the off-season?
Shut off the water at the main or the well pump, then open every faucet, high and low, and drain the lines, the water heater, and the pressure tank from the lowest point. Blow the remaining water out with compressed air if you can. Finally, pour nontoxic pink RV antifreeze into every sink and tub trap, each toilet bowl and tank, and floor drains, so the water you could not remove cannot freeze and crack the fitting.
Is RV antifreeze or draining the lines better for a cabin?
Do both. Draining and blowing out the lines with air is the primary defense and removes the bulk of the water. RV antifreeze then handles the traps and toilets, the low spots you can never fully drain. Use only nontoxic pink RV antifreeze rated for potable systems, never automotive antifreeze, which is poisonous and hard to flush out. In spring, run the taps until the pink is gone and the water is clear before drinking.
How do I keep mice and pests out of a closed cabin?
Seal every gap larger than a quarter inch around pipes, vents, and the foundation with steel wool and caulk, and screen the chimney and appliance vents. Remove all food, and store fabrics, bedding, and paper in sealed metal or hard-plastic bins. Set traps as a backstop and pull the fridge door open with baking soda inside. Rodents cause the most closed-season damage after freezing, chewing wiring and nesting in insulation and furniture.
What should I check when opening the cabin in spring?
Before you re-pressurize the plumbing, walk the place for rodent nests and chewed wiring, ceiling and wall stains that signal a winter roof leak, and any musty smell that points to mold. Then flush the antifreeze out, shock-chlorinate and test the well water, and test the water heater, furnace, smoke and CO alarms, and every GFCI outlet. Turning the water on last means a freeze-cracked pipe reveals itself while you are watching, not after you have left.