Understanding Ant Behavior and Colony Structure
ants are social insects that live in colonies with a division of labor: queens reproduce, workers forage and maintain the nest, and males mate and die. A colony can range from a few hundred to hundreds of thousands of individuals. Foraging workers leave pheromone trails to guide others to food sources, which is why you see ant lines. Understanding this behavior is key to control: baits exploit the trail system to deliver poison to the colony. In Detroit, pavement ants often nest under sidewalks and enter homes through slab cracks, while carpenter ants prefer moist wood in attics, porches, or wall voids. Odorous house ants are attracted to sweets and form supercolonies with multiple queens, making them harder to eliminate. Fire ants, though less common in Michigan, build large mounds in sunny areas and defend aggressively.
The Hidden Damage of Carpenter ants in Detroit's Older Homes
Detroit has a large stock of older homes, many with wood framing that can be susceptible to moisture. Carpenter ants don't eat wood like termites; they excavate it to create smooth galleries for nesting. Over time, this can weaken structural beams, floor joists, and wall studs. Signs include sawdust piles (frass) containing wood shavings and ant body parts, and rustling sounds in walls. Because carpenter ants are active at night, infestations may go unnoticed for months. Professional treatment often involves locating the parent colony (usually outdoors in stumps or dead trees) and satellite colonies inside the home. Drilling and injecting insecticide into the galleries is effective, but exclusion and moisture control are essential for long-term prevention. In Detroit's humid summers, keeping basements and crawl spaces dry is critical.
Why DIY Ant Control Often Fails
Many homeowners reach for over-the-counter sprays when they see ants. While these kill the ants you see, they don't address the colony. Worse, some sprays can contaminate bait trails, making baits less effective. Another common mistake is not identifying the ant species correctly. For example, carpenter ants require different treatment than pavement ants. Baits work well for sugar-loving ants but may be ignored by protein-seeking ants. Additionally, if the bait is not placed near the trail or is left out too long, it loses effectiveness. Professional pest control technicians are trained to identify species, locate nests, and choose the right product for the job. They also provide exclusion services to prevent re-entry. With a service guarantee, you're protected if ants return.
Ant problems by the numbers for Detroit homeowners
Most ant advice online repeats the same unsourced claims, so for Detroit homeowners the statements below are tied to specific surveys, studies and published cost guides, and each one says what it does and does not prove for a Detroit property. Eighty-three percent of ant-control professionals in the National Pest Management Association's late 2011 to early 2012 survey said they had dealt with ant infestations in restaurants, a figure about pros' caseloads rather than how many restaurants are infested. Homeowners who find ants near a sink or tub are seeing something professionals see constantly: 89% of pros in the National Pest Management Association's 2011–12 survey had treated bathrooms, though that measures pro experience, not how many homes are affected. What the research adds for Detroit: in the National Pest Management Association's 2011–12 survey of ant-control professionals across 37 states, 64% identified spring as a peak season; respondents could choose more than one season, and the figure is historical pro experience, not an infestation rate. The same question comes up in Detroit: Twenty-nine percent of U.S. adults surveyed by The Harris Poll for the National Pest Management Association (NPMA) had tried natural or home remedies against ants, according to findings released in July 2026 that did not disclose field dates or sample size. Keep this in mind while inspecting a Detroit home: trying it yourself first is common, so nobody should feel foolish for it: 37% of homeowners in HomeTeam Pest Defense's 2022 online survey of U.S. adults ages 25–75 said they had attempted DIY pest control, a self-reported, provider-sponsored figure. None of these sources surveyed Detroit specifically, so read them as national and regional context; the local facts that matter most are the ones an inspector documents at your Detroit property, meaning where activity is, what is attracting it and how it is getting in.