Key points at a glance Key points at a glance. Original editorial diagram. A half-eaten bag of chips in a seat locker is all the invitation a mouse needs. Mice chew upholstery and wiring, and they leave droppings and nests behind.
Quick answer: Empty every place food has been, from the cooler to the bottom of the tackle bag, before the boat goes into storage. Check compartments and the cover for damage, then decide who will look in on the boat over winter. Repellents help a little, but a clean boat and a check schedule do the real work.
Key points at a glance. Original editorial diagram.
A half-eaten bag of chips in a seat locker is all the invitation a mouse needs.
Mice chew upholstery and wiring, and they leave droppings and nests behind. Mercury lists rodent damage as a real storage concern, and anyone who's opened a boat in April and smelled it knows why. A boat that goes into winter empty and clean is a lot less interesting to them.
There's no scented product you can toss in at the end that replaces the rest of the job. Here's the whole plan, in order.
Empty the Places That Held Food
Start with the obvious: the cooler, the garbage bag and any open snack packets. Then open every storage space you used on the water this summer.
Check under removable cushions, in seat-storage bins and inside any bag you're leaving aboard. Empty the pockets of your fishing bag too, because a fishing bag rarely holds only tackle. Wipe up crumbs and spills before the cover goes on.
The same thinking applies to the ground around the boat. Health Canada's prevention advice comes down to taking away easy access, food and nesting spots. The U.S. Environmental Protection Agency says much the same about food, water and shelter around a property. A clean boat can still get a visitor, but you've taken away the reason to move in.
If the boat's staying at home, look at the space beside it. An overflowing garbage bin or a pile of loose lumber next to the trailer is part of the same job.
Check Access Without Creating Another Problem
Before storage, look over every compartment you can reach and the condition of the cover. Note any damaged fittings, gaps or signs that something already lives aboard.
Resist the urge to stuff rags into every opening. Drains, vents and equipment all have jobs to do, and a plug nobody remembers in spring causes its own trouble. If you want to block a suspected entry point, ask the boat or equipment maker how to do it without stopping the part from working, and write down anything that has to come out before you launch.
Ontario's small-animal guidance adds one more warning: don't seal animals inside when you close an entry point. If you find signs that something's already in there, deal with that first.
Repellents Aren't the Whole Plan
Health Canada says rodents can adapt to ultrasonic devices and come right back, so those gadgets only make sense alongside other measures. It also says bait or poison alone won't replace sanitation and keeping rodents out.
Be careful with chemical tips that get passed around the dock. Before you use any pesticide, check that its Canadian label covers your pest, your location and your method, and follow the label. A boating blog isn't a substitute for it.
If traps are part of your plan, someone has to check them. Health Canada calls for daily checks. A trap sitting in a closed-up boat all winter isn't a monitoring schedule.
Decide Who Can Check the Boat
For home storage, put the checks on your calendar and keep a short record of what you find. If a marina or storage yard has the boat, ask what its access rules are and whether anyone looks inside over the winter, so you know what's covered.
Look for changes: fresh droppings, chewed packaging, disturbed material or nesting debris. Those are among the signs the EPA lists. A dated photo and a short note help you describe a concern later, though a photo can't tell you whether the wiring behind a panel has been chewed.
Finding Droppings Changes the Cleanup
Don't sweep or vacuum dry droppings. Health Canada warns that the dust you stir up can make you sick. Its guidance calls for gloves, dampening the contaminated material and washing up afterward.
For a heavy infestation, call a professional. The City of Oshawa recommends a licensed pest-control operator for heavy infestations.
Report chewed wiring, hoses or other equipment before the boat goes back in the water. Clearing out a nest doesn't tell you the systems around it are sound, and a chewed harness is something we'd much rather find on the bench than have you find halfway across the lake.
What We See at HBW
Every fall we shrink-wrap boats for outdoor winter storage here on the south shore of Rice Lake. Every boat we wrap gets a 925 g container of Damp Guard moisture absorber under the wrap, and the batteries stay in the boat, disconnected.
If you leave your cover with the boat, it stays on while the boat waits for its wrap. Then we take it off and store it inside the boat for the winter. That's one more reason to have the boat emptied out before it comes to us: whatever's left in the lockers spends the winter in there with the cover.
Winter storage customers get a free spring check. If you've had mice in the boat before, say so on your service request.
If you're still deciding where the boat goes this winter, our guides on outdoor shrink-wrapped storage on Rice Lake and shrink-wrap versus indoor storage in Ontario lay out the trade-offs, and the winterization cost guide covers what fall service runs.
The best time to sort all this out is while the compartments are open and the boat is easy to get at. Empty it, look it over, set the check plan. Then put the cover on.
Sources
Ready to Get Your Boat Put Away?
Complete a service request at hbwservice.ca, then drop the boat off by trailer or by water. We winterize and store all brands. Mid-November is last call, and we close December 1 until April 1.
Phone: 905-342-2153
Service: hbwservice.ca
Configurator: mercuryrepower.ca
Harris Boat Works
5369 Harris Boat Works Rd, Gores Landing, ON K0K 2E0
harrisboatworks.ca | mercuryrepower.ca
