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Every spring in Howard Lake, MN, as the snow finally melts and daytime temperatures begin creeping above freezing, homeowners start spotting ants inside their homes. Maybe you have noticed tiny dark ants trailing across your kitchen floor, or perhaps you have found larger black ants crawling along a windowsill in your bathroom. Before you grab a can of spray from the hardware store, it is worth understanding exactly which type of ant you are dealing with. The two most common species we encounter in Howard Lake and throughout Wright County are pavement ants and carpenter ants, and knowing the difference between them can save you time, money, and potentially thousands of dollars in structural damage.
At MN Pest Elimination, we treat ant infestations across Howard Lake and the surrounding communities every spring. We have seen firsthand how misidentifying an ant species leads homeowners down the wrong path with ineffective DIY treatments while the real problem grows worse behind their walls. This guide covers everything you need to know about pavement ants and carpenter ants so you can identify which species has invaded your home and take the right steps to eliminate them.
Minnesota winters are long and brutally cold, but that does not mean the ants living in and around your Howard Lake home have disappeared. Both pavement ants and carpenter ants survive winter by entering a state of reduced activity. Pavement ants nest beneath heated concrete slabs, driveways, and foundation walls where residual warmth keeps them alive. Carpenter ants that have established colonies inside wall voids, attics, or crawl spaces go dormant when temperatures drop but remain insulated within your home structure.
When spring arrives in late March and April, both species become active again almost simultaneously. Snowmelt saturates the soil around your foundation, creating the moisture conditions carpenter ants need. Warming temperatures trigger pavement ants to begin foraging above ground. Howard Lake homeowners often discover both species at roughly the same time and assume they are dealing with a single ant problem when they may actually have two distinct infestations requiring different treatment approaches.
Pavement ants are the most common ant species we encounter in residential properties across Wright County. These small, dark brown to black ants measure about two to four millimeters long, roughly the size of a sesame seed. You will notice parallel grooved lines running along their head and thorax if you look closely. Their antennae have twelve segments with a distinct three-segmented club at the tip.
Pavement ants build their colonies beneath sidewalks, driveways, patios, garage slabs, and foundation walls. You have probably noticed the small mounds of sand that appear in cracks between pavement sections during warm weather. Those mounds are excavated material that pavement ants push to the surface as they expand their underground tunnels.
Inside your home, pavement ants typically enter through cracks in the foundation, expansion joints in concrete slabs, gaps around utility pipes, and spaces beneath exterior doors. They forage primarily for sweet and greasy foods, which is why you most often spot them in kitchens trailing along countertops or around pet food bowls. A single colony can contain between 3,000 and 5,000 workers, and multiple colonies can exist beneath a single home foundation.
The good news about pavement ants is that they do not cause structural damage. They do not chew wood or damage insulation. Their presence is primarily a nuisance and sanitation concern. However, once foraging trails are established into your living spaces, they can be difficult to eliminate without professional treatment that targets the colony rather than just the visible workers.
Carpenter ants are a completely different story. These are among the largest ants in Minnesota, with workers measuring between six and twelve millimeters long, roughly two to three times the size of a pavement ant. Most carpenter ants in our area are solid black, though some have reddish-brown coloring on their midsection. They have a smooth, rounded thorax profile and a distinctly pinched waist.
Unlike pavement ants that nest in soil, carpenter ants excavate galleries through wood to create their nesting chambers. They do not eat the wood like termites do. Instead, they chew through it and push the shavings out, creating small piles of sawdust-like material called frass near baseboards, door frames, or window casings. The frass often contains fragments of dead insects mixed with the wood fibers, which helps distinguish it from actual sawdust.
Carpenter ants specifically target wood that has been softened by moisture. In Howard Lake homes, the most common nesting sites include wall voids near bathrooms and kitchens where plumbing leaks have occurred, rim joists and sill plates in basements where snowmelt has caused moisture intrusion, window and door frames on the north side of the home, and deck structures where wood contacts soil or traps moisture.
A mature carpenter ant colony can contain 10,000 to 50,000 workers and may take three to six years to reach full size. During that time, the colony continuously excavates smooth galleries through your home's wooden structural members. According to the University of Minnesota Extension, carpenter ants are one of the most common wood-destroying pests requiring professional intervention in Minnesota homes.
When you find ants in your Howard Lake home, here is a quick comparison to help you determine which species you are looking at:
The treatment approach for pavement ants and carpenter ants differs significantly, which is why correct identification matters before you spend money on any pest control method.
Pavement ant infestations are typically treated with targeted baiting systems placed along foraging trails. The workers carry the bait material back to the colony beneath your foundation, where it is shared with the queen. This approach eliminates the colony at its source. Perimeter treatments around the foundation exterior also help prevent new colonies from establishing entry points.
Carpenter ant treatment requires a fundamentally different strategy. Because these ants nest inside your home's wooden structure, the primary goal is locating and treating the nest directly. This involves thorough inspection to identify the nesting site based on frass deposits, moisture patterns, and foraging trails. Treatment typically involves applying products directly into wall voids and nesting galleries, combined with exterior perimeter treatments. Addressing the underlying moisture problem is equally important to prevent reinfestation.
Over-the-counter sprays may kill individual ants on contact, but they rarely eliminate either species at the colony level. For carpenter ants, surface sprays can make the problem worse by causing the colony to scatter and establish satellite nests in new locations, a behavior known as budding.
These prevention strategies will help reduce your risk of infestation this spring and throughout the year:
Basic sanitation and sealing entry points may resolve minor ant issues. But professional ant control is the right call when:
At MN Pest Elimination, we begin every ant treatment with a thorough inspection to identify the species, locate nesting sites, and assess any contributing conditions. We then develop a targeted treatment plan specific to your situation. Our goal is always to eliminate the colony, not just the ants you can see.
Can carpenter ants cause as much damage as termites?
Carpenter ant damage develops more slowly than termite damage because carpenter ants do not consume wood as food. However, a mature colony active for several years can cause significant structural compromise. The key difference is that carpenter ant damage is typically concentrated around moisture-damaged areas, while termite damage can affect sound, dry wood as well.
Do pavement ants bite?
Pavement ants can bite and have a small stinger, but they are not aggressive toward people. The sting is too weak to penetrate most people's skin. They are considered a nuisance pest rather than a health or structural threat.
Why do I keep seeing ants even after spraying?
Over-the-counter sprays kill ants on contact but do not reach the colony. The queen continues producing eggs, and the colony sends out new foragers to replace the ones you killed. Professional treatment using targeted baits and void injections is the most effective approach for long-term elimination.
When is ant season in Howard Lake?
Ant activity in Howard Lake typically begins in late March or early April when sustained daytime temperatures reach the mid-40s. Pavement ant activity peaks from May through July, while carpenter ants remain active from spring through fall. Colonies nesting inside heated structures can be active year-round.
Ant season in Howard Lake is already underway, and the longer an infestation goes untreated, the more difficult and costly it becomes to resolve. Whether you have spotted tiny pavement ants trailing through your kitchen or large carpenter ants emerging from your walls, we are here to help you identify the problem and eliminate it at the source.
Contact MN Pest Elimination today to schedule an inspection of your Howard Lake home. We serve homeowners throughout Howard Lake, Waverly, Montrose, Delano, Buffalo, Hanover, Rockford, Annandale, Clearwater, and the surrounding Wright County communities with professional ant control and comprehensive pest control services you can count on.
