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Certified — Quebec Ministry of the Environment

Carpenter ants at home?We protect your home's structure.

They dig galleries through structural wood and weaken your building from the inside. We locate the colony — main nest and satellite nests — and eliminate it completely.

Phone estimate in 2 minutes
Location of the main nest and satellite nests
Thermal camera inspection of structural wood
Long-lasting treatment to protect your building
Fixed price, no hidden fees
Carpenter ants — professional pest control in Montreal by Extermineo
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How to recognize carpenter ants

Unlike termites, they don't eat wood: they excavate it for nesting. The result is the same — weakened structural wood, year after year.

Why a professional treatment is essential

Killing the ants you see changes nothing: the colony has a main nest (often outside, in a tree or stump) and several satellite nests in the house. Our approach:

Preventing their return

FAQ — Frequently asked questions

Can they really damage my house?

Yes. Year after year, their galleries weaken beams, joists and window frames. Slower than termites, but a colony established for years can require costly structural repairs.

Is seeing a few ants in winter serious?

Yes — it's an important signal: indoor activity in mid-winter almost always means a nest inside the building, warm in your walls. It's the best time to act.

How long does the treatment take?

Activity drops sharply within days, and the colony is generally eliminated in 2–4 weeks thanks to the transfer effect. Our 6-month guarantee applies.

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Solve your carpenter ants problem today

A certified technician replies within 6 hours on average. Fixed price announced before the visit, 6-month written guarantee.