Soffit Sealing — Mouse-Proofing
We seal the soffits and openings where mice get into your home.
Referred by exterminators
Many local exterminators refer us to their clients. The reason is simple: getting rid of mice solves nothing if they can come back. We seal the entry points — starting with the soffits — so the problem doesn't return.
How mice get in through soffits
Soffits (the underside of the roof overhang) often have poorly sealed joints, open corners or detached sections. A mouse can slip through a gap as small as a dime and climb the wall up to the attic. Once inside, it nests, breeds and damages insulation and wiring.
Our soffit sealing service
We inspect the roofline, identify every potential entry point and durably seal the soffits, corners and junctions with suitable products. The result: a sealed perimeter that keeps rodents (and water and cold air) out.
Why trust us with your soffits
- Referred by many exterminators
- Durable sealing of every entry point
- Prevents mice from returning after extermination
- Also protects against water and heat loss
- Clean work, from the ground or at height
- Available 7 days a week
We seal soffits in Montreal, Laval, Longueuil, Brossard, Saint-Hubert and throughout Greater Montreal, 7 days a week.
25-Year Guarantee · 25+ Years of Experience
Every joint is applied with Canadian Adfast products and the expertise built over 25+ years on the job. Our work is guaranteed for 25 years — we don't leave until you're satisfied.
- 25-year guarantee
- Certified Adfast products
- Installation down to -29°C
- Available 7 days a week
Frequently Asked Questions
My window is foggy between the panes — what should I do?
That's the sign of a failed thermos (sealed unit). No need to replace the whole window: we replace only the foggy sealed glass unit, which is far more affordable. Request a free quote.
Mice are getting in through my soffits — can you help?
Yes. We seal soffits and every entry point where rodents get in. That's exactly why many exterminators refer us: getting rid of mice is pointless if they can come back through the same openings.
How long does caulking last?
Quality caulking, applied with Adfast products on well-prepared surfaces, generally lasts 15 to 25 years depending on sun and weather exposure. That's why our work is guaranteed for 25 years.
When should I redo my window caulking?
As soon as the joint is cracked, detached, blackened or hardened, or if you feel drafts near the windows. A joint that lets water through should be redone quickly to prevent structural damage and mold.
Can caulking be done in winter?
Yes. Unlike many products, ours allow installation down to -29°C. No need to wait for spring to fix an urgent infiltration.
What products do you use?
We use Adfast products exclusively — made in Canada and designed to withstand the extreme temperature swings of Quebec winters.
Do you offer a guarantee?
Yes: our caulking work is guaranteed for 25 years. We don't leave a job site until you are fully satisfied.
Which cities do you serve?
We serve Montreal, Laval, Longueuil, Brossard, Saint-Hubert, Boucherville, Saint-Bruno-de-Montarville, Saint-Lambert, Candiac and all of Greater Montreal.
How much does caulking cost?
The price depends on the number of openings, the condition of the existing joints and access. We offer a free, no-obligation quote, usually within 24 hours.
Do you work on condos and co-ownerships?
Yes. We manage multi-unit projects from start to finish, in coordination with the condo board, with a clear schedule and minimal disruption to residents.