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Closing a Vacation Home: The Plumbing and Winterization That Prevents Disasters
Closing a Vacation Home: The Plumbing and Winterization That Prevents Disasters
A neighbor came back to their lake cabin after a winter absence to find that a water line had burst in the crawl space, run all winter through the insulation, and rotted half the subfloor. They'd turned off the water but hadn't drained the pipes, and a late-season freeze event finished the job. The repair took all summer and cost more than the cabin had been worth ten years earlier. This is the most expensive version of a completely preventable event.
The plumbing close: drain everything, don't just shut the valve
Turning off the water supply at the main shutoff is step one, not the complete solution. After the main is off, you have to drain the water that's already in the system. Start by opening every faucet, shower, and tub throughout the house and leaving them open until flow stops. Flush every toilet until the tank is empty. For water remaining in toilet bowls and tank traps, and in the P-traps under every sink and shower, this residual water needs either draining or protection. You can scoop out as much as possible from toilet bowls. Then add RV antifreeze solution — non-toxic propylene glycol, not automotive antifreeze — to each trap and toilet bowl. The antifreeze lowers the freeze point of whatever water remains without causing any harm if the plumbing eventually drains into a septic system. Use an air compressor to blow out any lines that drain by gravity rather than by opening a faucet. Supply lines with shut-offs at the fixture level should have those shut-offs closed after the supply is drained. pipe insulation foam sleeves on any pipes in unheated spaces add an extra margin against a brief but severe freeze event — even if the pipes are drained, insulation on exposed supply lines that might have been missed is worthwhile.Shutting down appliances and the refrigerator
Empty the refrigerator completely, clean it out, unplug it, and prop the door open. A refrigerator sealed with residual moisture over a winter off will greet you in spring with mold and an odor that doesn't leave easily. The same applies to any standalone freezer. Turn off and drain the water heater. Most have a drain valve near the bottom that works with a garden hose directed to a drain or outdoors. Turn off the power or gas to the heater before draining. If the property has a well pump, turn it off. A pump running against a frozen or broken line can burn out quickly.Pest exclusion: more important than it seems
Rodents searching for winter shelter are remarkably persistent and remarkably small. A mouse can squeeze through a gap the diameter of a dime. Walk the exterior perimeter and identify any penetrations where pipes, wires, or HVAC lines enter the structure. Pack these with copper mesh or steel wool and seal over it with exterior caulk. Expanding foam alone doesn't deter rodents; they chew through it readily. Inside, remove all food items and anything with strong organic scent — bar soap, candles, even paper towels in some cases. Set snap traps along the walls before leaving rather than hoping nothing enters. The traps you set in fall are far easier to deal with in spring than an active infestation.Heating: off or minimally on?
This is the genuine debate in vacation home winterization. A completely off house saves energy but requires the full drain-everything approach with no margin for error. A house with heat set to 55°F costs something in energy but provides insurance against the one pipe you forgot to drain and any extreme cold event that exceeds normal planning. If the property is in a zone that routinely drops below -10°F and you can't personally verify the close-down in person, maintaining a minimum heat setting is worth the cost. If the climate is moderate and you did the full drain procedure carefully, off is fine.What I'd skip
Skip leaving a neighbor with a "just check on it periodically" arrangement as your only backup. Specific instructions — what to look at, what would indicate a problem, who to call — are necessary if you want those check-ins to be useful. The bottom line: a proper vacation home close takes four to five hours done carefully. The alternative is measured in repair costs that start in the thousands and escalate from there. Ready to shop? Compare Home & Garden across stores → 📚 Or browse home & garden guides in Digital Goods →📢 Affiliate Disclosure: This article contains affiliate links. We may earn a small commission at no extra cost to you when you click through and purchase.
