How to Prepare for an Ant Exterminator: A Checklist for Canadian Homes

TL;DR

• Follow the company's prep sheet first, since the right steps depend on the ant species and the products used.
• Empty the bottom cupboards where ants are seen and move furniture 12 inches (30 cm) from the walls. Do not try to move heavy pieces.
• Store food in sealed containers, wipe up crumbs and take out the garbage. Cover or remove food, dishes and utensils from any area to be treated (Health Canada).
• Plan where pets will go, pick up or cover their bowls and litter boxes, and cover aquariums.
• Don't spray the ants before the visit. It can make the colony split, and chemical sprays stop a bait system from working (Health Canada).
• Need help? Get a quote from a recommended local exterminator through Pest Agent's referral form.

Knowing how to prepare for an ant exterminator is partly about what to leave alone. Spraying the trail across the counter the night before the visit feels productive, yet it can split a pharaoh ant colony into new ones, and Health Canada warns that chemical sprays keep a bait system from working.

The preparation that helps is mostly about access and food: clear the spaces where ants travel, seal away anything they eat, and plan where people and pets will spend a few hours if the technician sprays indoors.

Most of that work happens inside, where ant trails follow baseboards, the backs of bottom cupboards and the gaps hidden behind furniture.

How Do You Prepare for an Ant Exterminator Inside Your Home?

Preparing for an ant exterminator inside your home means giving the technician room to reach the areas where ants travel and removing anything that could be contaminated or compete with the treatment. Most companies send a prep sheet after booking. Follow it first, since the right steps depend on the ant species and the products used.

Empty Bottom Cupboards

Emptying the bottom cupboards gives the technician access to the corners and gaps ants use in the kitchen. Abell Pest Control's ant prep sheets ask you to empty the bottom cupboards and the bottom of closets in areas where ants are seen, especially the kitchen. For pharaoh ants, the sheet goes further: empty the cupboards, drawers and closets with activity, and keep everything you take out in the kitchen, for example on the table, so you do not carry ants to other rooms.

Move Furniture Away From Walls

Moving furniture away from the walls exposes the baseboards, where many ant trails run. Abell asks for furniture to be moved 12 inches (30 cm) from the walls in living rooms and bedrooms, and for closet floors and shelves to be cleared of shoes and other items. Clothing on hangers can stay. Do not try to move heavy pieces: leave them in place and point them out to the technician.

Food Storage

Food storage protects what you eat from the products and removes the food that competes with ant baits. Health Canada recommends covering or removing food, dishes and utensils from any area that will be treated with a pesticide. Put sugar, cereal, snacks and anything sweet or greasy in glass jars with rubber gaskets or plastic containers with snap-tight lids, wipe up crumbs and spills, and take out the kitchen garbage. If you are not sure how to deal with ants in the kitchen until the visit, our guide to getting rid of ants in the kitchen explains the basics.

Pets

Pets should be kept out of treated areas until the products are dry, so plan where they will go. Pick up or cover pet food and water bowls and litter boxes, as Orkin Canada suggests, and keep cats and dogs in a room that will not be treated, or take them with you if you have to leave.

Aquariums

Aquariums can usually stay in place if they are protected. Cover the tank and turn off the air filters before the treatment. Orkin Canada advises restarting the filtration equipment 6 hours after the treatment. Ask your technician if their product needs a different wait.

Make Problem Areas Accessible

Problem areas need to be reachable, because ants often travel inside walls, along pipes and through heating ducts. For pharaoh ants, Abell asks customers to make bathrooms, heating registers and electrical conduits accessible. Clear the space under the kitchen and bathroom sinks as well, so the technician can check around the pipes.

Health Concerns

Health concerns should be shared with the company before the visit. Orkin Canada recommends that anyone who is pregnant, has a respiratory problem or is immunocompromised stay away longer after a spray treatment. Some baits used for pharaoh ants contain allergens such as peanut butter and shellfish, according to Abell, so mention any food allergies in the household. If someone has a health condition, ask their doctor about the re-entry time.

How Do You Prepare the Outside of Your Home for Ant Treatment?

Ant treatment preparation outside your home is about clearing the foundation so the technician can find trails, entry points and nests. Carpenter ants can have a main colony outdoors and a satellite colony in a nearby structure such as your house (Health Canada), so the exterior inspection matters.

Outdoor Furniture

Outdoor furniture and planters pushed against the house hide the trails along the foundation. Abell asks for planters and patio furniture to be moved 12 inches (30 cm) away from the outside walls. As inside, do not try to move anything too heavy.

Firewood

Firewood stacked against the house is a classic hiding spot for carpenter ants. Health Canada recommends moving firewood away from the house and removing decaying wood near buildings. If you can, move the pile before the visit, and tell the technician where it was so they can check the ground under it.

Mulch Near the Foundation

Mulch, grass and plants touching the foundation give ants shelter and a bridge into the walls. UC IPM recommends keeping plants, grass and mulch at least a foot (about 30 cm) from the foundation of buildings. Pull mulch back from the walls and trim branches that touch the house so the technician can see the base of the walls.

What Should You Avoid Before the Ant Exterminator Arrives?

Before the ant exterminator arrives, avoid anything that kills or scatters the ants you see, because the technician needs to see the trails and, if baits are used, needs active ants to carry them back to the nest.

Do Not Spray the Ants

Spraying ants before the visit can make the job harder. Health Canada warns that spraying indoors where trails appear can make the colony split, and that chemical sprays stop a bait system from working. Alberta Health gives the same warning for pharaoh ants, which form new colonies when they are sprayed. Repellent home remedies such as vinegar or essential oils can scatter the ants in the same way. If you already used a spray or a store-bought product, tell the technician which one.

Keep Track of Ant Activity

Ant activity notes help the technician find the nest faster. Write down the rooms where you see ants, the time of day, and where the trails seem to go. For carpenter ants, Health Canada lists signs such as piles of sawdust-like material, slit-like openings in woodwork, winged ants indoors in spring and a dry rustling sound in the walls at night. Leave any sawdust piles in place so the technician can see them, and check our list of carpenter ant signs.

What Happens During an Ant Exterminator Visit?

An ant exterminator visit starts with an inspection to identify the ant species, because the species decides the treatment. Knowing what to expect helps you prepare the right rooms and plan your day.

Inspection

The inspection covers the inside and outside of your home. Orkin Canada says its technicians first identify the ant species and what is attracting the ants, and Abell describes a complete interior and exterior inspection to locate nests. Expect the technician to look at baseboards, cupboards, sinks, the foundation and any wood that is damp.

Carpenter Ant Treatment

Carpenter ant treatment focuses on the nest, which is often hidden in wall voids, hollow doors, attics or insulation, especially where wood is damp (Health Canada). Abell notes that the technician sometimes has to drill small pilot holes in walls to reach a nest, and may use liquid sprays, dusts or bait stations. Health Canada says lasting control comes from finding and treating the actual nest. For more, see our guide to carpenter ant pest control.

Pharaoh Ant Treatment

Pharaoh ant treatment relies on slow-acting baits, not sprays, because sprays make these ants split into new colonies. On Abell's pharaoh ant prep sheet, you and your pets do not need to leave your home for the bait treatment, and you can put your kitchen items back once the treatment is done. Our guide to pharaoh ants explains why these tiny indoor ants need this approach.

Pavement Ant Treatment

Pavement ant treatment can use baits, sprays or both, inside and around the foundation. Abell's pavement ant sheet says you and your pets need to leave for 4 hours once the treatment begins if a spray is used. The same applies to other common species such as odorous house ants, which are often treated with baits.

Time Out of the House

Time out of the house depends on the product, not on a single rule. In Canada, the product label sets the re-entry interval, and the applicator may have to tell you, in person or in writing, when it is safe to go back in (Health Canada). Health Canada's general advice is to keep people and pets out until the pesticide has fully dried. Company examples range from no need to leave for bait-only treatments to 4 to 6 hours for sprays (Orkin Canada). Ask for the exact time when you book, so you can plan meals, naps and pets.

Questions to Ask the Technician

Questions asked before the treatment save surprises later. Useful ones:

• Which ant species do I have?
• Which product will you use, and what is its PCP number?
• Do we need to leave, and for how long?
• Will you use baits, sprays or both, and where?
• How long before I can clean the treated areas?
• Is a follow-up visit included?

UC IPM suggests asking a company to use baits and spot treatments rather than perimeter treatments or monthly sprays. A PCP number on the label shows the product is registered by Health Canada. To understand the products pros carry, read what professionals use to kill ants.

What Should You Do After Ant Treatment?

After ant treatment, your job is to let the products work: stay out until it is safe, leave baits and dead ants alone, and keep cutting off other food. Most failed treatments come from cleaning, spraying or moving baits too soon.

Re-entry Time

Re-entry time ends when the technician says so and the treated surfaces are dry. When you come back, open the windows: Abell suggests 20 to 30 minutes, and Health Canada suggests opening doors and windows for a few hours to provide air flow. Once surfaces are dry, Health Canada recommends washing all surfaces that touch food with hot soapy water before you use them.

Cleaning After Treatment

Cleaning after treatment should wait until the technician says it is safe, and should never touch the baits. Abell's prep sheets say not to use other pest control products or cleaning products near bait placements or spray treatments, because they reduce the effect. Keep cleaning crumbs and spills elsewhere in the house, but leave the treated baseboards and cracks alone for the time the technician gives you.

Bait Stations

Bait stations work only if they stay where the technician put them. Do not move, open or tamper with them, and do not spray near them: Health Canada says chemical sprays stop a bait system from working. Keep children and pets away from them.

Dead Ants

Dead ants can stay where they are for a while. Health Canada notes that other ants may carry dead ants back to the nest, which spreads the product further into the colony.

More Ants After Treatment

More ants after treatment is common and usually a good sign. Some pest control companies, such as Horizon Pest Control, note a slight increase in ant activity in the first 4 to 9 days, as the products change the ants' behaviour. Let the ants feed on the bait instead of killing them.

How Long Ant Treatment Takes

Ant treatment takes days to weeks, not hours. UC IPM says it can take 5 to 10 days to see fewer ants, and several weeks or more for complete control with baits. Abell says its baits reduce pharaoh ants to very low levels in approximately 3 to 4 weeks. Species with many queens, such as pharaoh ants and odorous house ants, can take longer.

When to Call the Company Back

Calling the company back makes sense if you still see many ants after about 3 weeks, the point at which Horizon Pest Control asks customers to call. A single ant now and then is not a sign of failure. Many companies include follow-up or monitoring visits, so ask what your service covers. If you are still choosing a company, our guide to ant pest control explains what a good service includes, our ant extermination cost guide covers prices, and you can get a quote from a recommended local exterminator through Pest Agent's referral form.

Preventing a Return

Preventing a return keeps the work you paid for from going to waste. Health Canada recommends sealing cracks in the foundation and exterior walls, caulking baseboards and crevices indoors, and correcting damp spots, since carpenter ants favour moist wood. Do the sealing after the technician confirms the colony is gone, so you do not cut the ants off from the bait. For long-term habits, see our full guide on how to get rid of ants and the ant hub.