Every October, thousands of cottage owners face the same bittersweet weekend: closing up for winter. This guide to how to winterize a cottage in Canada walks through the full ritual - draining the pipes, antifreeze, insurance rules and the final lock-up.

Done right, closing takes one focused weekend and saves you from the classic spring disaster: arriving to burst pipes and a flooded floor. Work through these ten steps in order and you will drive away confident.

A small blue cottage with a snow-covered roof in winter

Photo: ZemplinTemplar via Wikimedia Commons

Table of Contents

1. Shut Off the Water and Drain Every Line

A closed blue gate valve with a red warning tag

Photo: Uwe Aranas via Wikimedia Commons

Water left in pipes is the number one cottage killer. Find the main shut-off - usually where the line enters from the well or lake - turn it off, then open every tap in the cottage, starting with the lowest, and flush every toilet.

Leave the taps open all winter so any remaining water has room to expand. If you have an air compressor, blow the lines out at about 40 psi, working from the tap farthest from the compressor back toward it.

2. Pour Plumbing Antifreeze in Every Drain

A row of red and green fuel canisters

Photo: Thiemo Schuff via Wikimedia Commons

After draining, pour non-toxic RV/plumbing antifreeze - the pink stuff, about $6-$8 a jug at Canadian Tire - into every sink, tub and shower drain, about two cups each, to protect the traps.

For toilets, sponge out the tank and bowl, then pour antifreeze into the bowl to stop sewer gas and protect the seal. Never use automotive antifreeze - it is toxic and does not belong in a water system.

3. Power Down, but Leave One Light Burning

A porch light glowing warmly at night

Photo: Henryemix via Wikimedia Commons

Unplug everything - the fridge (emptied, cleaned and propped open), the microwave, the TV. A power surge during a winter storm can fry anything left plugged in, and an empty running fridge wastes electricity for nothing.

But leave one or two lights on timers, or a single porch light burning. A lit cottage looks visited, which is the cheapest break-in deterrent there is, and it helps your drive-by checker see that the power is on.

4. Read Your Insurance Policy Before You Lock Up

A rusty padlock securing a wooden door

Photo: iMahesh via Wikimedia Commons

Most Canadian cottage policies have vacancy clauses: leave the place empty too long without checking and a burst-pipe claim can be denied. Many require a visit every 48-72 hours or a monitored alarm.

Call your broker before closing and ask exactly what "regularly visited" means in your policy. Get it in writing, keep a log of visits, and tell a neighbour your plans - this phone call is the most valuable hour of your closing weekend.

5. Unplug, Empty and Prop the Fridge

An open electrical breaker panel with labelled switches

Photo: FuriousYogi via Wikimedia Commons

A fridge left running empty all winter is money down the drain, and one left closed and unplugged grows mould. Empty it completely, wipe it down, unplug it, and prop both doors open with a folded towel.

Take home anything mice would love - and they love everything. Crumbs, canned goods with paper labels, even soap. A truly empty cottage kitchen is a boring one for rodents. Switch off the breakers for everything except the circuit feeding your timer lights.

6. Set Up Winter Drive-Bys

A snow-covered track through a frosty forest

Photo: Sudzie via Wikimedia Commons

If your policy needs regular visits, line them up before you leave: a neighbour, a local caretaker ($30-$60 a visit in most cottage country), or a rotating schedule with family. Give them a key and a simple checklist.

Ask them to check the basics: power on, no water on the floor, no broken windows, roof looking normal. A quick photo texted to you after each visit keeps everyone honest and gives you a dated record.

7. Roof, Gutters and Overhanging Branches

Roof tiles dusted with snow

Photo: Ardfern via Wikimedia Commons

Clean the gutters so meltwater cannot back up under the shingles, and trim any branches hanging over the roof - a January ice storm turns them into wrecking balls.

Check the roof for loose shingles now, because you will not be fixing them in February. If your cottage gets heavy snow loads, note where drifts pile up so your drive-by person can flag anything alarming.

8. Pull the Dock and Store the Toys

A snow-covered wooden dock on a frozen lake

Photo: Tony Webster via Wikimedia Commons

Ice destroys docks left in the water. Pull sectional docks onto shore, flip canoes and kayaks upside down on sawhorses, and store life jackets and ropes indoors where mice cannot nest in them.

Winterize the boat motor per the manual - fog the cylinders, drain the lower unit, stabilize the fuel. Cover everything with tarps tied down tight; a tarp flapping all winter shreds itself and whatever is under it.

9. Stack the Firewood and Secure the Yard

A neatly stacked wall of firewood

Photo: Kritzolina via Wikimedia Commons

If you heat with wood, top up the woodshed now - a full shed is worth more than money when you arrive to a cold cottage in March. Stack it off the ground, covered on top and open on the sides for airflow.

Secure or store everything else: patio furniture, the barbecue (propane tank disconnected and stored upright outside), garbage cans bungeed against raccoons. Walk the property once with fresh eyes, like a stranger looking for trouble. A tidy yard also just feels better to come home to - see our cosy winter living room guide for warming the inside when you reopen.

10. Walk the Closing Checklist

A small log cabin buried in snow, in black and white

Photo: LeFever Moe via Wikimedia Commons

Do one slow final walk-through with a written checklist: water off, taps open, antifreeze in drains, breakers off except the light circuit, fridge propped, windows latched, doors locked. Check off each item as you do it.

Lock up, take a photo of the locked door for your records, and drive away before dark while you can still see the road. Come spring, reverse the list - and the first coffee on the dock will taste like victory.

Frequently Asked Questions

How to winterize a cottage in Canada - what is the most important step?

Draining the water system. Burst pipes cause the costliest winter damage by far - shut off the main, open every tap, and pour antifreeze in the drains.

Can I just leave the heat on low instead of draining everything?

You can, at about 10°C, but a power outage during a cold snap leaves pipes unprotected. Most insurers and plumbers prefer a full drain-down for unattended cottages.

How often do I need to check on my cottage in winter?

Many Canadian policies require a visit every 48-72 hours or a monitored alarm - ask your broker for your exact clause and keep a visit log.

What kind of antifreeze goes in cottage drains?

Non-toxic RV/plumbing antifreeze (usually pink). Never automotive antifreeze - it is poisonous and made for engines, not water systems.

When should I close the cottage for winter?

Most Ontario cottage owners close around Thanksgiving weekend in October, before the first hard freeze. Watch the forecast - one -10°C night can burst an undrained pipe.

Final Thoughts

Closing the cottage is a ritual - the last fire, the last walk to the dock, the quiet drive home. Doing it right with this guide to how to winterize a cottage in Canada means spring opens with a weekend of enjoyment, not a weekend of plumbing repairs.

Print the checklist, take it slow, and do not skip the insurance call. Your future self, arriving to a dry intact cottage in May, will be very glad you did.

Sources

Gallery

The cracked frozen surface of Lake Baikal with mountains beyond

Photo: Sergey Pesterev via Wikimedia Commons

A canoe resting on a frozen lake at dusk

Photo: Reklawer via Wikimedia Commons

A cottage porch railing overlooking the woods

Photo: Jamescanningauthor via Wikimedia Commons

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