
Why do mice come into Toronto homes in winter, and how can I keep them out?
Fall in Toronto brings crisp air and changing leaves – and as winter approaches, a wave of pests starts looking for warmth and shelter
Sadia Afrin
As a Toronto pest control technician, I’ve seen every kind of panic call imaginable. And almost always, someone eventually asks: “Why do I have cockroaches in my house even though I clean?”
It’s a fair question, and the answer isn’t your housekeeping. Cockroaches and bed bugs thrive in city apartments because buildings provide exactly what they need: heat, moisture, and easy movement through shared walls. I know this because long before I joined Insectica, I woke up in my Pharmacy Ave apartment covered in rashes. When I lifted the mattress, I found tiny rust-colored bed bug eggs neatly lined up.
Fast-forward to today, and I help residents across Toronto who experience the same horrifying surprise. Just last week, a young couple called our emergency pest control line. The moment I stepped inside, I spotted dark bed bug fecal marks near the headboard, and then a German cockroach sprinting toward the fridge. Classic Toronto apartment scenario.
My role? Bring calm, clarity, and real solutions. And that’s exactly what Insectica is here to deliver throughout Toronto’s high-rises and neighborhoods.
Urban buildings are a dream environment for pests. Heat stays constant, humidity builds in kitchens and bathrooms, and food crumbs, even the invisible ones, sustain roaches for weeks.
Toronto tenant studies show 73% reported cockroaches and nearly half experienced bed bugs in the last two years (Canadian Broadcasting Corporation (CBC))
Nationally, apartment buildings are the #1 location for bed bug infestations (Public Health Agency of Canada)
Roaches especially move from unit to unit, which is why so many people ask themselves why they have cockroaches in their house even when they haven’t brought anything in. It’s rarely the tenant’s fault, it’s the building ecosystem.
Cockroaches do more than creep people out. They’re known carriers of harmful bacteria like Salmonella and E. coli U.S. (Centers for Disease Control and Prevention (CDC). They contaminate counters and food areas simply by crawling across them.
Their shed skin and droppings can trigger severe allergies and asthma attacks, particularly in children (Centers for Disease Control and Prevention (CDC).
Scientific studies show bed bug exposure can contribute to stress, social withdrawal, and depression (Journal of Medical Entomology). Your home should be restful, pests make it the opposite.
Toronto does have established names like Pestend, GreenLeaf, and Advantage Pest Control. They each provide solid services for rodents, ants, wasps, and general cockroach pest control.
But Insectica stands out by delivering something deeply needed in this city: honesty, accessibility, and real human support.
You’re not calling a national call center, you’re reaching a real Toronto team who knows the buildings, neighborhoods, and pest patterns.
When you choose Insectica, you’re choosing a company that treats your home like our own.
If you’re dealing with cockroaches, bed bugs, or both, don’t wait for the situation to escalate. The sooner treatment starts, the sooner your home becomes peaceful again.
We proudly serve the entire Greater Toronto Area. No matter where you are, our technicians are nearby and ready to help.
Insectica is here 24/7, always ready to help Toronto fight back.
Written By
Pest Control Specialist at Insectica Toronto
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Fall in Toronto brings crisp air and changing leaves – and as winter approaches, a wave of pests starts looking for warmth and shelter

Even in freezing weather, cockroaches thrive inside heated apartments by finding warm hideouts and ample food and water, so the cold outdoors doesn’t kill them

Fall in Toronto brings crisp air, changing leaves, and a surge of pests seeking warmth and shelter. As temperatures drop, homes and buildings become prime