Carpenter Ants

Think Carpenter Ants Are Nesting in Your Property?

If you’ve spotted large ants in your kitchen, on your deck, or around doors and windows, it’s normal to worry. You might wonder where they’re coming from or if they’re chewing up your house. Maybe you’ve already used a spray and thought it helped—until the ants showed up again.

Carpenter ants thrive in damp wood, which makes the Island’s homes especially attractive to them. With so many buildings built from wood and surrounded by trees, carpenter ants have many chances to move in. Older homes, houses with crawlspaces, and structures with past water damage are even more at risk.

At Island Pest Control, we understand how carpenter ants behave here. We’ve worked in character homes in Victoria, cabins in the Cowichan Valley, and newer homes in Nanaimo. We know where ants like to hide, how they move through a building, and how to stop them.

Signs You Might Have Carpenter Ants

You might catch a few ants crawling on the counter and think it’s nothing, but more signs usually follow. Pay attention if you notice:

• Large black or black-and-red ants inside, especially near windows, doors, or water lines
• Ants moving along baseboards, pipes, or electrical lines
• Piles of fine dust that look like sawdust, known as frass, near walls or beams
• Bits of insulation, wood shavings, or insect parts mixed into that dust
• Light rustling inside walls or ceilings in the quiet evening hours

Carpenter ants often target places with hidden moisture. That includes crawlspaces with poor air flow, attics with roof leaks, decks exposed to rain, and bathrooms with plumbing issues. If you live on a wooded lot or near forested areas, outdoors nests may already exist close to your home.

If you see winged ants indoors, that’s a major warning. These swarmers signal that the colony has matured and is releasing new ants to start satellite nests. Left unchecked, they can spread quietly through your structure.

Why You Shouldn’t Ignore Carpenter Ants

Carpenter ants cut smooth tunnels through wood beams, framing, and trim. Over time, those galleries turn strong wood into hollow shells. You might not notice at first, but the damage adds up.

Common problems include:

• Soft or sagging floors
• Cracked ceilings or trim that pulls away from windows and doors
• Weakened deck supports and roof edges
• Hidden rot that opens up during renovations or repairs

A colony can exist in walls or crawlspaces for years. You might kill a few ants with spray, but if you don’t deal with the nests, they keep coming back. Most homes on the Island have at least one moisture issue—carpenter ants take advantage of that.

We search for both the ants and the conditions that invite them.

Carpenter Ant Behavior on Vancouver Island

The ants we deal with most here are large black ants or black-and-red carpenter ants. Primary nests often sit in stumps, logs, or mature trees outdoors. From there, the ants move into homes nearby to look for warm shelter and food.

Most infestations include:

• A main nest outdoors
• One or more satellite nests inside—often in wet wood near leaks, rot, or poor drainage

In spring or early summer, you might see winged ants gathering on windows or siding. These “swarmers” show that a colony is mature and trying to expand. That’s not a problem you can wait out.

We know how to track carpenter ants from the places you see them back to the nests. We read the layout of buildings and yards to find where they’re hiding.

How We Handle Carpenter Ant Control

We follow Integrated Pest Management, which means we won’t throw chemicals at the problem and hope. We inspect first, plan smart, and help you fix the things that caused the infestation in the first place.

Inspection and Property Assessment

We begin with a full walk-through of your home or building. We check crawlspaces, attics, decks, foundations, and nearby wood sources like logs or stumps. We look for frass, trails, tunnels, and cracks in siding or roofing.

While we’re inspecting, we also check for moisture issues. Leaks, blocked gutters, pooled water near the foundation, and high humidity help carpenter ants thrive. We tell you what we find and how to fix it.

Focused Treatment Plan

Once we know where the nests are and how ants are moving, we build a plan to get rid of them.

Our treatment may include:

Targeted bait where ants are active

• Dusts or residual products in wall voids or hidden areas
• Treatments around outdoor nests, landscape timbers, or rotting logs

We time our visits to limit impact on homes or businesses. Whether it’s a family with kids or an office with deliveries, we work around your schedule when possible.

Repair and Prevention Steps

With the immediate problem under control, we show you how to reduce the chances of it coming back.

Helpful steps include:

• Fixing roof or pipe leaks
• Improving drainage with downspouts or grading
• Sealing cracks, gaps, and utility entries
• Moving firewood off the ground and away from the house
• Trimming trees or shrubs that brush against the roof or siding

We give you a clear list that's easy to pass along to your roofer, plumber, or property crew.

Follow-Up When Needed

Some clients want peace of mind after treatment. If your home sits on a wooded lot or your property is older, routine follow-ups help keep ants in check. For large strata buildings or commercial spaces, we offer seasonal service plans. We handle the monitoring and call you if new signs show up.

We Help Homes, Businesses, and Strata Properties

Carpenter ants don’t care where they nest. Whether you live in a small rancher or manage a multi-unit building, we know how to handle it.

For Homeowners

We take care of homes across Vancouver Island, from Langford to Ladysmith. We use family-safe methods and schedule visits that won’t disrupt your day. We cover decks, crawlspaces, kitchens, and more.

For Business Owners

Whether it’s a shop, warehouse, or office space, carpenter ants can damage wood frames and make you look unprofessional. We show up discreetly and work with your hours to solve the issue fast.

For Property Managers

In strata buildings, carpenter ants spread between units. Treating just one won’t work. We create building-wide plans and keep you updated so you can keep residents informed.

Why Neighbours on Vancouver Island Call Island Pest Control

We’ve worked with carpenter ants across Vancouver Island for over 30 years. We’re based in the Cowichan Valley and cover Duncan, Nanaimo, Victoria, and the areas between.

We bring:

• Experience with Island homes and local bugs
• Licensed pest control pros who know safe, smart treatment methods
• Clear answers to your questions
• Plans that solve the root problem—not a quick band-aid

We know your time matters, and that pest problems bring stress. We’re here to make the process simple and get real results.

Stop Carpenter Ants Before They Wreck What You’ve Built

Carpenter ants won’t leave on their own. The longer you wait, the more damage they cause—and often it’s hidden. You don’t want to find out about a nest when your deck collapses or you open up a wall during a renovation. Don’t give them another season to spread. Start a plan today to remove carpenter ants and protect your structure. We’ve got the tools and knowledge to help, and we’re ready when you are. Reach out now and let’s stop the damage before it gets worse.