Closing a Cottage for Winter: The Two-Hour Shutdown Checklist for Canadian Seasonal Properties

Water before heat, pests before the lock

Every closing checklist in circulation contains roughly the same items. The difference between a smooth spring opening and a flooded crawlspace usually lies in the sequence, because several steps only work if an earlier one has already happened. You cannot drain a water heater safely until its power is off, you cannot blow out lines until the pump is off and the taps are open, and you cannot make a sound decision about the thermostat until you know whether the pipes are empty.

The physics explain why half-measures are risky. Water expands by roughly 9% as it freezes, but engineering work by the Madison Group on pipe freezing found that plastic pipe usually fails indirectly: a plug of ice seals one section, and further freezing behind that plug drives the pressure up until something gives. That is why a line that is mostly empty, with pockets of water trapped at a low spot, can be more dangerous than it looks. The goal of the water block is not "less water" but "no standing water anywhere."

Pests follow the same logic in reverse. Food, garbage and nesting material come out first, entry points are sealed afterwards, and the lock goes on last, so nothing gets sealed inside by accident.

If your year-round home also needs attention before a long winter trip, the same principles apply there, and our winterizing checklist for vacations and snowbird season walks through the primary-home version.

What "seasonal," "unoccupied" and "vacant" actually mean on your policy

The words sound interchangeable, but on a policy they carry different weight. Intact Insurance defines a seasonal residence as a dwelling you occupy on an irregular, occasional or only seasonal basis, such as a three-season cottage used from May to October, while a secondary residence is used more regularly, often around four days a month, and is built to be livable year-round. Intact notes that for seasonal residences, damage from sewer backup or water coming in through the roof is not covered, and frozen-food coverage is not available.

"Vacant" is a narrower idea than most people assume. In the wordings reviewed for this guide, it means everyone has moved out with no intention of returning, and it is usually paired with a 30-day limit after which certain losses are excluded. A cottage you close in October and plan to open in May is normally not vacant in that sense. "Unoccupied" can be broader still; one mutual insurer's wording defines it as a dwelling not used as a residence for more than 12 consecutive months. The practical takeaway is that a seasonal policy exists for the winter-closed cottage, and its conditions, rather than the general vacancy rules, are the ones your closing has to satisfy.

Seasonal policies also tend to be narrower overall. According to the Insurance Bureau of Canada's overview of home coverage types, coverage for seasonal or secondary properties may be limited to named perils, comprehensive coverage may not be available, and losses such as sewer backup, fences, food in a freezer and outdoor plants are commonly excluded. Knowing that shapes which steps are about protecting your coverage and which are about protecting things the policy will never pay for.

Three wordings, three day counts, one pattern

Consumer blogs tend to describe insurance conditions loosely, so it helps to read the real thing. A comprehensive seasonal homeowners wording from Aviva excludes freezing damage during the usual heating season in a heated part of the dwelling if you have been away more than four consecutive days. Cover still applies if you took one of three precautions: you arranged for a competent person to enter the dwelling each day to make sure the heat was on, you shut off the water supply and drained all the pipes and domestic water containers, or your plumbing and heating system was connected to a monitored alarm station with 24-hour service.

The same form then excludes freezing damage within an unheated portion of the dwelling, with no precaution that brings the cover back. Read together, those two clauses tell a cottage owner something important. If the heat goes off for the winter, the protection comes from the lines being empty, not from the policy picking up the cost of a freeze. If the heat stays on, the thermostat alone does not satisfy the condition; it has to be paired with daily entry or a monitored alarm.

Other wordings follow the same pattern with different numbers. The Sandbox Mutual habitational wording sets the trigger at 10 consecutive days away in the heating season, and then offers the same three routes: a reliable person entering daily, the water shut off with all pipes and appliances drained, or a 24-hour monitored low-temperature alarm.

A third data point shows how much the details can vary. Square One Insurance says its customers can be away for seven days or less in the heating season without extra steps, and beyond that must either keep the heat on with someone checking periodically, without a daily requirement, or shut off the water and drain the pipes and containers, including the hot water tank. Four days, seven days, ten days: the structure is familiar, and the numbers belong to your own policy.

The Insurance Bureau of Canada puts it plainly: most policies spell out how often a competent person must check a home to make sure the heat is on, and most exclude frozen-pipe damage if the home is vacant, even when the insurer has given permission for the vacancy.

The 72-hour rule you may have heard about

A "72-hour rule" for winter cottage checks circulates widely online, usually without a policy excerpt or insurer name attached. None of the Canadian wordings reviewed for this guide used a 72-hour interval; the ones we read set a trigger of four, seven or ten days away, then required daily entry, a full drain-down or a monitored alarm. That does not mean no policy anywhere uses 72 hours, only that the figure is not something to rely on secondhand. The number that matters is printed in your own wording, and the fastest way to find it is to ask your broker for the freezing clause by name.

The same logic applies to the primary home you drive back to on Monday evening, which is why our $200 fall home checklist ranks its tasks by which ones are conditions of coverage rather than simple prudence.

This protocol assumes a typical three-season cottage with a pump, a tank water heater, a propane barbecue and a wood stove or fireplace. It also assumes you have already packed personal belongings and stripped the beds. Two people can finish comfortably inside two hours; one person working alone should budget an extra half hour for the water block.

Minutes 0–30: The water system

Start at the pump. Switch off its breaker or unplug it before touching a single tap, because a pump that loses its prime and keeps running will damage itself quickly. Then close the main shut-off valve where the supply enters the building.

Next comes the water heater, and the order here is the part people most often get wrong. A. O. Smith's maintenance guidance is to turn off an electric heater at the breaker, or set a gas unit's control to OFF, shut the cold-water inlet, open a hot tap, and only then open the drain valve. The same guidance warns that an electric tank must be completely full before power is restored, or the heating element will short out and be destroyed. A strip of painter's tape across the water heater breaker, labelled "tank empty," saves an expensive mistake next May.

With the pump off and the heater draining, open every tap in the cottage, hot and cold, along with the shower valves and the outdoor hose bibs. Then open the low-point drains, which are usually a small valve or cap at the lowest spot in the supply lines, often in the crawlspace or utility room. Letting air in at the top while water leaves at the bottom is what empties the lines, so work from the highest fixture down.

Disconnect every garden hose as you go. Frost-proof hose bibs are designed to drain themselves, but Woodford, the faucet manufacturer, explains that a hose left attached traps water in the tube inside the wall, which can freeze and split without any visible sign until the water is turned on again in spring.

If you blow out the lines with an air compressor, which many owners do after gravity draining, keep the pressure low and the volume high. No household plumbing manufacturer publishes a cottage blow-out figure, but irrigation makers do for the same kind of pipe: Hunter Industries advises that pressure should not exceed 50 psi for polyethylene pipe or 80 psi for PVC, and that compressed air should never be pushed through a backflow device. Treat 50 psi as a ceiling rather than a target, set the regulator before connecting, and keep the water heater isolated from the air.

Finish the block with the toilets and traps. Flush each toilet with the supply off, sponge or pump out what remains in the tank and bowl, then pour plumbing antifreeze into every bowl, sink, tub, shower and floor drain. Use only non-toxic plumbing or RV antifreeze, never automotive antifreeze, which contains toxic ethylene glycol. Recochem, a Canadian maker of plumbing antifreeze, notes that its propylene glycol blend protects to −50°C only when undiluted, and that water left in a trap dilutes it and weakens that protection. Emptying first and pouring second is what makes the antifreeze work.

Minutes 30–60: Appliances, food and fuel

With the water sorted, move through the kitchen. Empty the fridge and freezer completely, wipe them dry, unplug them, and prop the doors open a few centimetres so mildew has nothing to feed on. Take every scrap of food home, including sealed pantry goods, pet food and birdseed, because a mouse will chew through cardboard and thin plastic without hesitation.

Clear out anything that can freeze and burst: bottled drinks, canned goods, liquid cleaners, paint and sunscreen. If a dishwasher or washing machine is connected to the supply, check the manufacturer's instructions for draining it, since these appliances hold water in pumps and hoses that a household drain-down will not reach.

Then deal with fuel. Close the valve on any propane tank serving the cottage, disconnect the barbecue cylinder, and store cylinders upright and outside the living space. Unplug small appliances and electronics, and take lithium-ion batteries from tools, e-bikes and water toys home or store them away from direct sunlight and anything combustible.

If you have a sump pump, TD Insurance suggests disconnecting its discharge hose so it cannot freeze solid and back up, and powering off and draining the water heater, which by now should already be done.

Minutes 60–90: The heat decision

This is the block where the policy wording and the thermostat meet, and it is worth slowing down for. There are three honest options, and each one commits you to something different.

Heat off, fully drained. This is the standard for a three-season cottage and the approach most closing checklists assume. Because freezing damage in an unheated portion of the dwelling is excluded outright in the sample seasonal wording above, your protection here rests entirely on the drain-down being complete. Turn off the furnace or baseboard heaters, then switch off every circuit you do not need. Leave on only what must stay powered, such as a security or leak-alarm system.

Minimum heat with water left in the lines. This option suits an insulated cottage that someone visits often, but it carries the heaviest obligation. In the wordings reviewed, heat alone does not satisfy the freezing condition; you also need a competent person entering on the schedule your policy sets, typically daily once the trigger period passes, or a monitored low-temperature alarm. Canadian insurer and broker advice on the setting itself ranges from about 8–10°C to 10–15°C to no lower than about 13°C, which tells you there is no single right number. The setting matters less than the arrangement behind it.

Drained and minimally heated. Some owners drain everything and still keep a little heat on to protect drywall, finishes and anything with residual moisture. That is a reasonable choice if the power is reliable, but it does not change the plumbing obligation: the drain-down is still what satisfies the freezing condition, and the heat is a comfort for the building rather than a coverage step.

Whichever path you choose, deal with the wood stove or fireplace now. Make sure the fire has been out for at least a day, remove the ash into a metal container with a lid, close the damper and make a note to book a sweep before the first spring fire. Our winter fireplace and wood stove safety guide covers ash handling and venting in more detail.

Minutes 90–120: Envelope and pests

The last block closes the building and keeps the neighbourhood wildlife on the outside. The timing of a Thanksgiving closing works in your favour here. Ontario's guidance on small animals recommends autumn as the time to exclude animals, once the young have left the den or nest, and asks owners to seal ground-level holes, cracks and warped siding while taking care not to seal an animal inside. It also recommends a chimney cap and trimming branches that give easy access to the roof.

Walk the outside of the building slowly with a flashlight. Look for gaps where pipes and wires enter, loose soffits, torn screens and any hole larger than a pencil around the foundation. Steel wool packed tightly and covered with exterior sealant, or hardware cloth fastened over larger openings, will stop most mice and squirrels. Knock on the crawlspace access and listen before sealing it.

Be realistic about why these steps matter. The pest block is not a coverage condition in the usual sense; it protects you against damage the policy often will not pay for at all. The same Aviva seasonal wording excludes loss caused by birds, vermin, skunks, rodents other than raccoons and squirrels, bats or insects, and other wordings exclude raccoons as well. A mouse nest in the insulation is almost always an out-of-pocket repair.

Finish with the exterior. Clear the eavestroughs and downspouts so meltwater can move away from the foundation, bring in or tie down deck furniture, close shutters, and pull canoes and kayaks well above the high-water line. Note where the dock and boat lift sit relative to the ice, and photograph them. Close and lock every window, draw the curtains, and lock the doors.

Your two-hour protocol at a glance