Pest Control in Markham

For standard sprays and gels, you typically only need to stay out of treated rooms for 2-4 hours until surfaces dry. Fogging or flea treatments may require 4-6 hours away. Whole-structure fumigation (rare, mostly for termites or severe bed bugs) means vacating for 1-3 days. Your technician must give you re-entry instructions — ask if they don't.

Exterior barrier sprays typically remain effective 60-90 days, less in heavy rain. Gel baits keep working for weeks as insects share them. Rodent programs are about proofing, not just bait, so results last as long as entry points stay sealed. This decay is why prevention plans run quarterly.

Insect activity in Markham tracks warm weather — ants, roaches, wasps and mosquitoes peak in the warmer months. Rodent callouts spike as temperatures drop and mice and rats move indoors. Booking preventive treatment just before your problem season is cheaper than reacting to an established infestation.

Clear access to skirting boards, under sinks and behind appliances; store open food and utensils away; note where and when you've seen pests (photos help); secure pets and cover fish tanks. For bed bug jobs, follow the company's prep sheet exactly — bagging laundry and decluttering — or the treatment can fail.

DIY sprays and baits handle light ant or roach activity fine. Hire a professional for anything structural or persistent: termites, bed bugs, rodents inside walls, wasp nests in cavities, or repeat infestations. Pros have access to products and application methods retail products don't match, and misapplied DIY sprays can scatter colonies and make infestations harder to treat.

It varies by lease and jurisdiction, but the common pattern is: landlords are responsible for infestations arising from the building (rats, structural entry, problems present at move-in), while tenants pay when the infestation results from their own housekeeping or was introduced by them (e.g. fleas from pets). In multi-unit buildings, roach and bed bug treatment usually needs adjoining units treated at the same time — coordinate through the landlord or manager.

Expect roughly $400-$1,000 per room for insecticide programs over 2-3 visits, or $1,200-$3,000+ for whole-home heat treatment. Toronto and other large rental markets have heavy bed bug pressure, so multi-unit coordination through your landlord is often required.

Cold knocks down exterior insect activity, but it pushes mice, rats and squirrels indoors — rodent calls peak in fall and winter. Overwintering insects like cluster flies and boxelder bugs also move into wall voids in autumn, so exclusion work is best done in late summer.