If you are hearing fast light scratching in your attic early in the morning and again around dusk, you are probably dealing with a squirrel. October is when squirrel attic entry spikes across Toronto and the GTA as the second litter of the year, born in August and September, becomes fully independent and starts scouting warm denning sites for winter. Here is what you need to know about squirrel removal before they settle in and the real damage begins.
Why Toronto Homes Get Squirrels in October
From the treetops of High Park to the quiet residential backyards of Leaside, Toronto’s squirrels have made themselves at home. The demand for squirrel removal has surged across the GTA, particularly in areas where mature trees, aging housing stock, and accessible attics collide.
Squirrels produce two litters of 4 to 6 babies a year. One litter in March and another in mid-August to September. The young from the second litter are now mobile, independent, and actively competing for denning space as October temperatures drop. This is why attic entry calls across North York, Scarborough, and Etobicoke spike every year at this exact time.
October is a good time to deal with your wildlife problem. There is no stress about squirrel babies, and homeowners are looking to have prevention screening installed to keep out squirrels before they can have babies inside their attic again.
Toronto’s housing stock makes the problem worse. Aging rooflines, mature tree cover, and shared attic spaces make Toronto homes especially vulnerable to squirrel break-ins. Semi-detached homes with shared rooflines are particularly at risk because squirrels that are excluded from one unit simply move along the roofline to the adjacent one.
Signs You Have a Squirrel in Your Toronto Attic
The activity pattern is the most reliable identifier. Squirrels are strictly diurnal, meaning they are active during daylight hours only. If the scratching in your attic happens at dawn and again in the late afternoon, and goes quiet through the night, it is almost certainly a squirrel rather than a raccoon or mice.
Squirrels are notorious for entering attics through roof vents and soffits, especially during the spring and fall. Once inside, they chew on electrical wires and insulation, increasing the risk of fire and costly repairs.
Here are the specific signs to look for across your roofline and attic:
Chewed or damaged soffit vents. Aluminum soffit vents with visible gnaw marks around the edges, missing mesh screens, or enlarged openings are the most common squirrel entry points on Toronto homes. Squirrels chew through standard aluminum vent covers quickly.
Scratching at dawn and dusk. Fast light scurrying sounds in your attic ceiling early in the morning and again in the late afternoon are the clearest behavioural indicator of squirrel activity as opposed to other wildlife.
Squirrels on your roofline repeatedly. Squirrels running along your gutters, roofline, and up overhanging tree branches onto your roof on a regular basis are actively scouting entry points. This pre-entry behaviour is the best time to act before they successfully get inside.
Nesting material in attic insulation. Squirrels build warm nests inside attic insulation, pulling and compressing insulation into nesting piles. If your attic shows disturbed or displaced insulation in compact piles, squirrels have been denning there long enough to establish themselves.
Leaf nests in nearby trees. Large round leaf nests visible high in mature trees near your roofline indicate an active squirrel population using those trees as launching points to access your roof.
The Damage Squirrels Cause in Toronto Attics
Most Toronto homeowners underestimate squirrel damage because they think of squirrels as harmless. The damage they cause inside an attic over a single winter is significant.
Electrical wiring is the most serious concern. Squirrels gnaw continuously to control their incisor growth and attic wiring is one of the most accessible gnawing surfaces they find once inside. Chewed wiring is a documented fire hazard and the repairs are expensive once the damage is discovered. The presence of squirrels in the attic results in damaged wires or pipes. Structures that are heavily contaminated with squirrel feces are unhealthy and emit foul odours. pestend
Insulation damage accumulates quickly. Squirrels compact and shred attic insulation to build nesting areas, reducing your home’s thermal efficiency and potentially requiring full insulation replacement after a prolonged infestation. Squirrel urine and droppings contaminating insulation create ongoing odour problems and attract other pests.
Structural damage from repeated entry and exit through the same point, combined with winter freeze-thaw cycles, can cause fascia boards to rot and roofline materials to deteriorate around the entry point.
Why Sealing the Entry Point Is Not Enough
The most common mistake Toronto homeowners make when they discover a squirrel in their attic is sealing the entry point themselves without confirming all animals have exited first.
If mother squirrels are separated from their babies they become very determined to make another entry point through chewing to get to their babies. A trapped squirrel causes significantly more damage trying to chew its way back out than the original entry point. The result is multiple new holes in your roofline rather than one.
Finding squirrels’ entry holes is extremely difficult because they are quite small. A full roofline inspection identifying every actual and potential entry point is essential before any exclusion work begins. Sealing the most obvious hole while missing three others along the same roofline section accomplishes nothing.
What Professional Squirrel Removal Looks Like
Professional squirrel removal starts with a full exterior roofline and attic inspection to map every entry point, assess attic damage, and determine whether young are present.
One-way exclusion doors are installed at all confirmed entry points. A one-way door allows squirrels to exit the attic safely and humanely while blocking them from returning. After a confirmed period of no activity, the one-way door is removed and the entry point is permanently sealed with heavy gauge galvanized steel mesh and metal flashing.
All secondary and potential entry points across the entire roofline are sealed simultaneously with appropriate materials. This is the step most DIY attempts miss. Sealing one hole while leaving adjacent vent covers, fascia gaps, and soffit corners unaddressed simply redirects the squirrel to the next available point.
Tree branch trimming is recommended as a final step. Any branches overhanging or touching your roofline within 2 to 3 metres should be trimmed back to eliminate the primary route squirrels use to access your roof from surrounding trees.
For rodent and wildlife control across Toronto and the GTA including squirrel removal, raccoon removal, and full wildlife exclusion, Saba Pest Control responds 24 hours a day with a 30 minute arrival time. Call (647) 867-7378 or visit sabapc.ca to book an inspection. Our North York team covers all surrounding GTA communities.
Squirrels vs Raccoons vs Mice: How to Tell What Is in Your Attic
Getting the identification right matters because the removal approach differs for each species.
Squirrels are active during the day and quiet at night. Their movement is fast, light, and scurrying. They enter through small chewed openings in soffit vents and fascia boards.
Raccoons are active at night, primarily between dusk and midnight. Their movement is heavy, slow, and thumping. They enter through large torn openings in soffit corners and roof vents that require significant force to create.
Mice are active primarily between 11pm and 2am. Their movement is very quiet and almost inaudible through finished ceilings. They enter through gaps as small as 6mm including pipe penetrations, weatherstripping gaps, and foundation cracks rather than roofline openings.
If you are unsure which animal you are dealing with, a roofline inspection by a trained technician is the fastest way to confirm the species and the entry points before any removal or exclusion work begins.
Are there squirrel babies in Toronto attics in October?
Fall is a good time to deal with wildlife problems because there is less concern about young animals compared to spring. The second litter born in August and September is typically fully mobile and independent by mid-October in most years. However a professional inspection should always confirm this before exclusion work begins, as late litters do occur.
Can squirrels damage my home’s electrical system?
Yes. Squirrel gnawing on attic wiring is a documented cause of residential fires and is one of the most serious risks of an unaddressed squirrel infestation. If you discover an attic squirrel infestation, having an electrician assess the wiring after removal is a sensible precaution depending on how long the animals have been present.
How do squirrels get into Toronto attics?
The most common entry points are aluminum soffit vents that squirrels chew through, plastic roof vent covers they gnaw apart, gaps at fascia board joints, and damaged or missing drip edge flashing along the roofline. Overhanging tree branches within 2 to 3 metres of the roofline provide the primary access route from surrounding trees to the roof surface.
Will squirrels leave on their own once cold weather arrives?
No. Squirrels that have established a warm nesting site in your attic will remain there through winter. They do not hibernate and will continue to use the attic as their primary shelter through the coldest months, potentially for multiple seasons if the entry point is not addressed.
