A Homeowner's Guide to Humane Eviction, Canadian Rules, and Keeping Them Out for Good
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You've been hearing it for a week now. A light, fast scrambling across the ceiling just after sunrise. A rolling, scratchy sound in the soffit above the bedroom window. Maybe a heavier thump, and then silence. You told yourself it was the house settling, or the wind, or a branch on the roof — until you walked outside on a Saturday morning and spotted a grey squirrel slipping behind the fascia like it owned the place.
Here is the reframe worth carrying through the rest of this article: what you have is not a noise problem. It is a damage problem, and the clock started the day they moved in. Squirrels chew compulsively, and what they chew is expensive. Wiring. Insulation. Rafters. Plumbing stacks. Soffit wood that used to keep water out of your roof deck. Every week you let them stay is a week they are shaping your attic into their idea of a nursery, and leaving behind the kind of mess that ends up on an electrician's invoice.
The good news is that the method for getting them out is well-established, humane, and mostly doable by a confident homeowner — as long as you understand the two wrinkles that trip up almost everyone (babies and winter), the Canadian wildlife rules that govern what you can actually do, and the roof-height realities that sometimes mean calling a pro is the right call, not a defeat. This guide walks through all of it: how to confirm it really is squirrels, what damage you're racing against, the one correct eviction sequence, and how to make sure they — or the next family down the block — don't come back next spring.
Before you order a one-way door or call a wildlife company, confirm the tenant. The sound signature is the easiest tell. Canadian wildlife-control operators consistently describe squirrel activity as fast, light scrambling — almost a rolling patter — with most of the action at dawn and again in the late afternoon. Mice sound like smaller, scratchier movements inside walls and are usually a nighttime phenomenon. Rats are nocturnal and heavier. Raccoons land with obvious weight, often accompanied by a slow thump-drag across the attic floor. If you hear a busy commuter who seems to sleep in on the weekends, you're almost certainly dealing with squirrels.
Species matters, too. In most Canadian cities, the culprit is the eastern grey squirrel — the classic urban attic tenant, content to treat your roof like a condo. In cottage country and forested suburbs, red squirrels show up instead, and they are scrappier, more territorial, and more likely to be the "in the wall" squirrel that drives a homeowner up the wall in return. Alberta's own provincial guidance notes that red squirrels are active all day, do not hibernate, and readily nest in attics and outbuildings if given the chance. Northern flying squirrels, which are nocturnal and social, travel in small colonies and tend to surprise homeowners by showing up in numbers, especially in rural Ontario and the Maritimes.
Outside the house, walk a slow lap at ground level with a pair of binoculars. Look up along the roofline for fresh chewing around soffit intersections, gable vents, roof vents, chimney flashing, plumbing stacks, and the junctions where dormers meet the main roof. Squirrels are tidy enough that the entry hole is often surprisingly small and clean — a rounded opening the diameter of a loonie or so. Listen for activity at dawn; if you see a squirrel ducking behind fascia or emerging from a vent, you've confirmed both the species and your first entry point.
The urgency isn't emotional, it's electrical. Rodents, squirrels included, chew to manage teeth that never stop growing, and the things they chew in an attic include the plastic insulation around electrical wiring. If they reach the conductors, the result is a short circuit or an arc fault — the same kind of event your breaker is supposed to catch but sometimes doesn't. Ontario's fire safety guidance for outbuildings specifically recommends running concealed wiring in conduit or junction boxes to protect it from rodents, because chewed wiring is a recognized ignition source in residential and agricultural buildings alike. Canadian insurance risk-education materials treat the same hazard as non-trivial: rodents chewing wiring is one of the reasons insurers underwrite the fire-damage exposure they do.
The damage you can see is usually the insulation. Squirrels flatten blown cellulose and batt insulation into nests, and they urinate and defecate throughout the attic floor as they live there. The R-value plummets, the smell eventually finds its way into the rooms below, and the insulation itself becomes a biohazard that a remediation crew — not a regular cleaner — has to remove. From there, the list only gets longer: chewed fascia and soffit wood that admits water on the next driving rain; fleas, mites, and other parasites that arrive with the squirrels and stay after they leave; and, in the worst cases, rafter and sheathing damage that shows up on a future roof inspection as "rot of unknown origin."
If you can see obvious chewing on electrical wiring, if a breaker has recently tripped without explanation, or if you smell a persistent burning or plastic odour in the attic area, stop doing this yourself and call a licensed electrician alongside a wildlife professional. Eviction is still the plan — but electrical damage is not a weekend project.
Canadian humane-wildlife guidance converges on a single sequence, and it is not trapping. The BC SPCA's best-practices guidance for squirrels recommends installing a one-way exclusion door at the active entry point for two to three nights, letting the animals leave on their own, and then sealing every hole before they can find their way back. This is also what reputable Canadian wildlife operators do when you pay them. The method respects provincial wildlife rules, keeps the animals alive, and — done properly — solves the problem for good.
The sequence goes like this. First, do a full exterior inspection of the roofline and the ground level below it. You are not looking for the one hole you already know about; you are looking for every gap, every soft spot of chewed wood, every loose soffit panel, every vent with a torn screen. Wildlife-control firms consistently flag this as the step that separates a lasting fix from a short-term one — miss a secondary entry and the squirrels will simply chew a new hole nearby, or filter back in before the main door is sealed.
With the map of openings in hand, the plan is to install a commercially available one-way exclusion door over the primary active entrance. Every other opening, except the one with the one-way, has to be sealed first, because the point is to funnel the squirrels to the exit you've chosen. A one-way looks a bit like a cat flap; the squirrel pushes through from the inside, it clicks closed behind them, and they cannot push it back open from the outside.
Leave the one-way in place for three to seven days and watch it. You are looking for any evidence of activity inside the attic during that window — fresh sounds, a squirrel seen re-entering the hole from outside, droppings in new locations. If you have multiple squirrels or if they are using secondary entry points you missed, this monitoring period is when you will notice. Many Canadian wildlife-control companies build a monitoring visit or a "warranty" check into their service precisely for this reason.
Once the attic has been quiet for a couple of full days and the nightly camera or the visual check shows no returning animals, remove the one-way and permanently seal the last opening. For the sealing itself, skip the can of expanding foam. Squirrels and their rodent cousins will chew straight through foam, caulk, and lightweight screening in an afternoon. Canadian pest-control educational materials are unambiguous that the right materials are metal — galvanized hardware cloth with quarter-inch openings, sheet-metal flashing, and heavy-gauge screen — fastened with stainless or galvanized fasteners directly into sound wood. Foam can fill the air gap behind the metal, but it cannot be the barrier.
A few situations tip the balance decisively toward hiring a licensed operator. Roof access above a single-storey is one. Any sign of active babies is another. Visible electrical chewing, a distinct odour inside the living space (which usually means a dead animal somewhere you cannot reach), or an entry point that clearly continues into a wall void beyond the attic — all good reasons to step aside and let someone with a ladder, a camera, and a wildlife licence take the job. A good Canadian wildlife-control company's quote will include the inspection, the one-way installation, a written entry-point repair plan using metal materials, and at least one follow-up monitoring visit. If any of those pieces are missing, keep shopping.
Canadian squirrels don't have one baby season — they have two, which is the thing that catches most homeowners off guard. The BC SPCA cautions that dependent young are typically present in structures in the spring and again in late summer and early fall, and that one-way doors must not be used during these windows unless a professional reunion plan is in place. Install an exclusion door with kits inside, and the mother is on one side of the wall while her babies starve on the other. The result is demolition work to remove the bodies, odour remediation that can take months to fully clear, and a situation the SPCA and most provincial regulators consider a violation of humane-wildlife standards.
The experienced alternative is called a reunion or reunification box. A wildlife professional removes the nest and places the kits, warmed if necessary, in a small enclosure attached to the exterior near the original entry point. The mother, who is a determined and capable animal, then relocates her babies one at a time to a backup nest she already has somewhere else. It sounds improbable until you see it work. The crucial point for homeowners is that this is not a DIY job; if you suspect babies — and you should assume babies between roughly March and May and again between August and October in most of Canada — your move is to call a humane-wildlife operator first and start exclusion only on their timeline.
The other common worry is winter. If I evict them in January, will they freeze? In most of Canada, the answer is no — adult grey and red squirrels do not hibernate, have alternative cavities and nests they've already mapped out, and handle cold better than you'd expect for a two-pound animal in a snowstorm. The harder problem is access. A one-way door installed at eight metres up on an icy winter roofline is a safety problem before it is a wildlife problem, and most homeowners should not be on a roof in those conditions. This is the season when hiring a licensed operator with proper fall-protection gear is genuinely the smart call, not a cop-out.
Winter also changes your species mix and your timing sensitivity. Red squirrels will happily winter over in an attic and can give birth as early as late February in warmer pockets of Ontario and British Columbia. If you are tempted to delay exclusion until spring, you may find that "spring" in squirrel terms has already happened. The cleanest approach in winter is still the standard one — inspect, install, monitor, seal — done safely, which usually means professionally.
Wildlife regulations are a provincial matter in Canada, and the rules around squirrels can surprise homeowners who assume "nuisance" equals "do what you want." In Ontario, the province's guidance on harassing, capturing, or killing a wild animal damaging private property spells out what is and isn't permitted under the Fish and Wildlife Conservation Act. Relocation is particularly restricted: a captured animal may not be moved more than one kilometre from the point of capture, a limit that exists partly because wild animals moved into unfamiliar territory typically struggle to find food and shelter and often do not survive.
In Quebec, wild animals are protected under the Act respecting the conservation and development of wildlife, and capturing or relocating them is generally prohibited without specific authorization. Many municipalities — Montreal and its boroughs in particular — layer bylaws on top, treating relocation as a last resort after exclusion and deterrence have failed. British Columbia's Wildlife Act sets similar constraints, and the BC SPCA's influence on the province's wildlife-control norms means humane eviction is the strongly preferred approach in practice. Alberta's treatment of red squirrels is comparatively permissive — Fish and Wildlife offices will in some cases loan live-catch traps to help homeowners with nuisance red squirrels, though the expectation is still humane handling and release within provincial rules. Atlantic provinces generally follow the same pattern: SPCA humane standards, provincial wildlife acts, and municipal bylaws that favour exclusion over capture.
The short version: wherever you live in Canada, physical exclusion is the legally safe path. Lethal methods, poisons, glue traps, and off-property relocation are either restricted, regulated, or outright prohibited depending on your province, and they are almost never necessary when a one-way door and a roll of hardware cloth will do the job.
Eviction without prevention is a temporary win. The same weaknesses that let this year's squirrels in will welcome next year's — and they are paying attention, especially if they've heard your roofline is habitable. The single highest-leverage move is hardening every potential roof opening with the right materials. Cover roof and soffit vents with quarter-inch galvanized hardware cloth fastened into sound wood, and replace any lightweight plastic or thin aluminum screening that has started to curl. A chimney cap with a proper rodent-rated screen handles that route. Worn rubber plumbing-stack boots should be swapped for metal-flashed replacements that squirrels can't gnaw through. The same exclusion discipline applies to any bathroom or dryer vents that might look like a comfortable cavity to a passing critter. Any chewed fascia or soffit board needs to be cut back to clean wood, not just patched on top.
Tree cover is the other half of the equation. Canadian wildlife-control guidance — echoed by provincial advisories — recommends trimming branches so that no limb overhangs or touches the roof, with a practical clearance of roughly two metres (six to eight feet) from the roofline. Squirrels are easily capable of leaping that distance, but removing the easy jump dramatically reduces visits. Pair that with an annual roofline inspection in early fall — after any summer storms and before the late-summer litter season ramps up — and you've taken away almost every reason a squirrel would choose your house over the next one.
Skip the tricks that don't work. Mothballs, ammonia-soaked rags, ultrasonic repellers, and predator-urine granules show up on endless blog posts but fail in real-world Canadian attics — and in the case of mothballs and some commercial repellents, create air-quality and toxicity issues of their own. Physical exclusion with metal, maintained annually, is the only durable fix.
On the DIY side, a commercial one-way exclusion door runs roughly $40 to $80 at a Canadian pest-supply retailer. A roll of quarter-inch galvanized hardware cloth — enough to screen multiple roof and soffit vents — is another $30 to $60. Add sheet-metal flashing, stainless fasteners, a pair of work gloves, and a decent headlamp, and a homeowner doing the exclusion themselves can usually come in under $150 in materials, assuming they already own a ladder they trust.
Professional pricing in Canadian urban markets is reasonably consistent. A straightforward eviction — inspection, one-way installation, exit monitoring, and sealing of the main entry — typically runs around $300 to $600 in Ontario, with similar ranges in Greater Vancouver, Montreal, and Calgary. Complex jobs push higher: squirrels nested deep in a wall cavity or ceiling, or a house with multiple entry points across a tall or complicated roofline, can land anywhere from $800 to $1,500 or more, especially if attic insulation has to be removed and replaced. Inspections on their own generally run $95 to $225, and a full professional roof inspection tends to be the best way to surface the entry points you may not have seen from ground level.
Canadian home insurance policies are consistent on this point, and it tends to surprise people: damage caused by rodents and pests, squirrels included, is a standard exclusion. So is the cost of wildlife removal itself. Your policy will not reimburse the exterminator's invoice, nor will it pay to replace chewed insulation or repair gnawed soffit wood as a wildlife event.
There is one meaningful exception worth knowing. If squirrel-chewed wiring starts a fire, the resulting fire damage — the drywall, the roof sheathing, the personal belongings — is usually covered under the fire peril of a standard policy, even though the rodent damage that caused the fire is not. The same logic applies to water damage from a chewed plumbing line causing a pipe to fail. This is why insurance risk-education materials treat rodent activity as an underwriting concern in the first place: the rodent is excluded, but the catastrophic event they can trigger often isn't. The takeaway: don't count on insurance to bail you out of a squirrel problem, but do report any fire or water loss that follows from one.
About the Author
Angela Nightingale is the Senior Editor at Homeowner.ca with two decades of experience in digital publishing and content strategy. She has owned two homes, taken on her share of DIY projects, and learned what most guides fail to mention. She writes from the belief that the best home guidance comes from people who have lived through the decisions — and her goal is always to leave readers feeling confident, not overwhelmed.
Not reliably, and especially not in the fall or winter. An attic is warm, defensible, and — as far as a squirrel is concerned — a perfectly good place to raise a family. Waiting them out is almost always more expensive than evicting them, because every week adds chewed wiring, contaminated insulation, and potential damage to the building envelope.
Yes, and in many cases you should. Adult squirrels handle cold well and have backup nests, so you are not condemning them by evicting them in January. What changes in winter is roof safety — if your entry point is high, icy, or snow-covered, hire a licensed wildlife professional rather than climbing yourself.
Open it back up immediately if the squirrel has been trapped for less than about twenty-four hours. A sealed-in adult will chew its way out, often through a new and worse hole, and a sealed-in nest of babies will die. If it has been longer or if you cannot reach the entry, call a humane-wildlife operator the same day.
Typically three to seven days. You want to see the attic stay quiet for at least two consecutive days before you seal the last opening. If activity continues past a week, you almost certainly have a second entry point you missed, or a nest of young inside — both reasons to pause and reassess.
No. None of them produce durable results in a Canadian attic, and mothballs in particular create an air-quality problem of their own. Physical exclusion with metal materials is the only approach that holds up.
In most provinces, no — or at least, not the way people typically assume. Ontario limits relocation to within one kilometre of the capture site, Quebec's wildlife act generally prohibits capture and relocation without authorization, and British Columbia's rules strongly favour on-site eviction over relocation. Check your provincial wildlife authority before you trap anything, and when in doubt, lean on exclusion rather than capture.
For a straightforward eviction from an accessible attic, expect roughly $300 to $600 in most Canadian urban markets. Complex cases — squirrels in walls, multiple entry points, or a roofline that requires specialized access — can climb to $1,500 or more, and any insulation remediation is a separate cost.
The removal itself and the direct rodent damage will almost certainly be excluded. A resulting fire or water-damage event caused by chewed wiring or plumbing is usually covered under the standard fire or water peril. Read your policy or ask your broker to confirm your specific endorsements.
A dead animal in a wall or attic cavity is almost always a job for a professional, both for the physical access and for the remediation of affected insulation and building materials. If the smell is in the living space, isolate the area and get a wildlife-control or remediation company to identify and remove the source rather than trying to mask the odour.
