How to Tell If You Have Bed Bugs in Your Montreal Apartment

Published March 11, 2026 · Extermination DMP

Montreal's dense apartment buildings make the city one of the top hot spots for bed bug infestations in Canada. Whether you live in a Plateau walk-up, a Ville-Marie high-rise, or a Saint-Hubert duplex, bed bugs can hitchhike into your home on luggage, second-hand furniture, or even through shared walls. Catching the problem early is the single most important thing you can do to keep treatment costs down and sleepless nights to a minimum.

The Four Classic Warning Signs

• Itchy bites in clusters or lines. Bed bugs tend to bite exposed skin while you sleep. Bites often appear in a row of three — sometimes called "breakfast, lunch, and dinner." They are red, slightly swollen, and intensely itchy.
• Small rust-coloured stains on sheets. After feeding, a bed bug may get crushed as you roll over, leaving tiny blood smears on your bedding or pillowcase.
• Dark fecal spots. Look at mattress seams, headboard joints, and baseboards. Bed bug droppings look like tiny ink dots and may smear when touched with a damp cloth.
• Shed skins and eggs. As nymphs grow they moult five times. Translucent shells accumulate near hiding spots. Eggs are about the size of a grain of rice and pale white.

Where to Look in a Montreal Apartment

Bed bugs are flat and hide during the day. Start your inspection at the mattress: lift the seams, check the piping, and look under the tag. Pull the bed away from the wall and inspect the headboard — particularly if it is upholstered. In older Montreal apartments with baseboard heaters, check the gap between the heater and the wall. Electrical outlets, picture frames, and the folds of curtains are also common hiding places.

DIY Checks vs. Professional Inspection

A flashlight and a credit card (to scrape along seams) can help you find evidence yourself. However, bed bugs are experts at staying hidden. If you suspect an infestation but cannot find proof, a professional inspection is worth the investment. At Extermination DMP we use systematic visual inspections combined with years of field experience to confirm the presence of bed bugs before recommending treatment.

What to Do If You Confirm Bed Bugs

Do not panic, and do not start throwing furniture away. In Quebec, tenants are protected under the Regie du logement — your landlord is typically responsible for paying for extermination in a rental unit. Contact your landlord in writing and call a licensed exterminator. Avoid using hardware-store sprays: improper treatment pushes bed bugs deeper into walls and makes professional treatment harder.

A certified exterminator will apply targeted treatments — usually a combination of residual insecticides and steam — and schedule a follow-up visit two to three weeks later to eliminate newly hatched nymphs.

Preventing Re-Infestation

After treatment, encase your mattress and box spring in bed-bug-proof covers. Reduce clutter around sleeping areas, and inspect second-hand furniture carefully before bringing it indoors. When travelling, keep luggage off hotel floors and check the mattress before settling in.