It starts with one or two on the countertop. Then a line along the baseboard. Within a few days, you’ve got dozens of ants marching across your kitchen floor, up the cabinets, and along the windowsill. If you live in Maple Ridge, you know the drill — ant season is here, and your kitchen is their favourite destination.
Ants invading through kitchen doors, sliding glass doors, and window frames is one of the most common pest complaints in Maple Ridge, Coquitlam, and the Lower Mainland from April through September. The good news: once you understand why they’re coming in and how they’re getting in, you can shut them down.
Why Your Kitchen Is the Target
Ants are driven by three things: food, water, and shelter. Your kitchen has all three in abundance.
Food Sources
Ants have an incredible sense of smell — they can detect food residue that’s invisible to the human eye. The crumb that fell behind the toaster, the sticky spot where someone set down a juice glass, the residue inside the recycling bin — all of it registers as a neon “open” sign to foraging ants.
Sugar and grease are the biggest attractants. Ants are particularly drawn to:
- Honey, jam, and syrup (even dried drips on jar exteriors)
- Fruit left on the counter — especially overripe fruit
- Pet food bowls (dry kibble and wet food alike)
- Crumbs in the toaster tray and around the stove
- Grease residue on stovetops and range hoods
- Open garbage and recycling bins
Water Sources
Kitchens provide reliable moisture that ants need, especially during dry summer months. Dripping faucets, condensation around the dishwasher, damp sponges left by the sink, and even the water tray under your refrigerator can sustain an ant colony’s water needs.
Easy Access
Kitchen doors — especially sliding patio doors — are the single most common entry point for ants in Maple Ridge homes. The gap beneath a standard exterior door is more than enough for ants. Sliding doors are worse: the track collects debris that prevents a proper seal, and the weatherstripping deteriorates over time, leaving gaps on both sides and bottom.
Other common kitchen entry points include:
- Window frames with deteriorated caulking
- Gaps where plumbing enters through the wall under the sink
- Cracks where the countertop meets the backsplash near an exterior wall
- The gap between the door frame and the wall (often hidden by trim)
Which Ants Are Invading Your Maple Ridge Kitchen?
Not all ants are the same, and knowing which species you’re dealing with determines the best treatment approach.
Pavement Ants
These are the most common kitchen invaders in the Lower Mainland. They’re small (2-3mm), dark brown to black, and form very visible trails. Their colonies are usually outside — under driveways, patios, walkways, and foundation slabs — and they send foragers into your home through cracks in the foundation and gaps under doors.
Pavement ants are a nuisance but don’t cause structural damage. They’re after food and will trail anything sweet or greasy back to the colony.
Odorous House Ants
Similar in size to pavement ants but with a distinctive trait: crush one and it releases a smell often described as rotten coconut. Odorous house ants are common throughout Maple Ridge and are particularly persistent kitchen invaders. They can establish satellite colonies inside wall voids, which means the nest might actually be inside your home — not just outside.
Carpenter Ants
If the ants in your kitchen are large (6-13mm) and black, you may have carpenter ants. While they do forage in kitchens for food, their presence indoors is more concerning because it may indicate a nest inside your home’s wood structure. See our guide to carpenter ant damage for more details.
Pharaoh Ants
Small (2mm), light yellow to reddish, and extremely difficult to control. Pharaoh ants are less common in residential homes but show up occasionally, particularly in apartments and condos. They establish multiple satellite colonies and can spread quickly through a building.
How Ants Find Their Way to Your Kitchen
Understanding ant behaviour helps explain why they seem to appear out of nowhere — and why killing the ones you see doesn’t solve the problem.
Scout Ants
A colony sends out scout ants to explore for food and water. These are the first one or two ants you notice on the counter. When a scout finds a food source, it returns to the colony, laying down a chemical pheromone trail.
Trail Pheromones
Other workers follow the pheromone trail directly to the food source. This is why ants appear to march in a perfect line — they’re literally following a chemical highway. The more workers that travel the trail, the stronger the pheromone becomes, and the more ants follow it.
Why Killing Trail Ants Doesn’t Work
Wiping out a line of ants with a paper towel or spraying them with a kitchen cleaner kills those individual ants but doesn’t address the colony. The scout will return, re-lay the trail, and new workers will follow. The colony itself — which can contain tens of thousands of ants — is untouched.
This is why ant problems seem to keep coming back no matter what you do. You’re addressing the symptom (the trail) without treating the source (the colony).
How to Stop Ants From Getting Into Your Kitchen
Step 1: Cut Off the Trail
Clean the ant trail with a solution of white vinegar and water (50/50 mix). This disrupts the pheromone trail and temporarily disorients the workers. Wipe down the entire path you can see — along the baseboard, up the wall, across the counter.
Step 2: Eliminate Food Sources
This is the most important step and the one most people skip.
- Deep clean the kitchen — move the stove, refrigerator, and dishwasher and clean behind and beneath them
- Wipe down all surfaces daily with a mild cleaner — countertops, stovetops, cabinet fronts, door handles
- Store food in sealed containers — switch from chip clips and twist ties to glass jars and airtight plastic containers
- Clean the toaster tray and any appliances that accumulate crumbs
- Take garbage out nightly during ant season, and use a bin with a tight-fitting lid
- Rinse recycling — even a thin residue of pop or beer in a can is enough to attract ants
- Don’t leave pet food out — feed pets at scheduled times and remove the bowl afterward
Step 3: Seal Entry Points
Focus on the areas where ants are entering:
- Door sweeps — install or replace the sweep on your kitchen door. For sliding doors, clean the track thoroughly and check the weatherstripping on both panels
- Caulk gaps around the door frame, window frames, and where the backsplash meets the wall
- Seal pipe penetrations under the sink with steel wool and caulk
- Check the threshold — the gap between the door threshold and the floor is a common ant highway
Step 4: Create a Perimeter Barrier
Apply a perimeter treatment along the exterior foundation where ants are entering. This can be a commercial ant barrier spray or a natural deterrent like diatomaceous earth along the door threshold. For best results, treat:
- The base of the exterior door
- Along the foundation for 3-4 feet on either side of the entry point
- The door frame and threshold
Step 5: Address the Colony
If you want permanent results, you need to eliminate the colony — not just the foragers. Ant bait stations are more effective than contact sprays because workers carry the bait back to the colony, where it’s shared with the queen and other workers.
Place bait stations:
- Along the ant trail (not directly on it — nearby, so workers find it)
- Under the sink
- Behind the refrigerator
- Near exterior door frames
Important: don’t use spray insecticide and bait at the same time. Sprays kill the workers before they can carry bait back to the colony, making the bait useless.
When to Call a Professional
DIY methods work well for minor ant problems — a few ants in spring that respond to cleaning and sealing. But call a professional if:
- The ants keep coming back after you’ve cleaned, sealed, and baited — the colony may be too large or too well-established for over-the-counter products
- You’re seeing ants in multiple rooms — this suggests a large colony or multiple colonies
- The ants are large and black — carpenter ants require professional treatment to locate and eliminate the nest
- You have an odorous house ant problem — these ants establish satellite colonies inside walls, and standard baits may not reach them
- You’ve found ants inside your walls or cabinets — this indicates the nest is inside the structure, not just outside
Professional ant treatment targets the colony directly using commercial-grade baits and applications that aren’t available in hardware stores. A trained technician can also identify the species, trace the entry points, and create a treatment plan specific to your situation.
Preventing Ants Year After Year
Ant problems in Maple Ridge tend to be seasonal but recurring. The same conditions that attracted ants this year will attract them next year unless you make lasting changes:
- Annual perimeter treatment in early spring (March-April) before ant season begins
- Maintain door seals and weatherstripping — check them every spring
- Keep landscaping trimmed away from exterior walls — ants use plants and mulch as pathways
- Move mulch back at least 12 inches from the foundation — mulch retains moisture and harbours ant colonies
- Fix moisture issues promptly — dripping outdoor faucets, clogged gutters, and poor drainage all attract ants
Get Your Kitchen Ant-Free
Ants in the kitchen are frustrating, but they’re solvable. For most Maple Ridge homeowners, a combination of thorough cleaning, entry point sealing, and targeted baiting will get the problem under control. For persistent problems or large infestations, professional treatment is the fastest path to a pest-free kitchen.
Canadian Pest Control provides ant treatment for homes and businesses across Maple Ridge, Coquitlam, Port Coquitlam, Pitt Meadows, and the Lower Mainland. Call (778) 598-7378 for a free inspection and quote — we’re available 24/7.