Oliver Roy5 Best Waterproofing Services in Montreal for a Cozier, Drier Home
A damp basement is bad enough without imagining the repair bill that might follow. With Montreal’s freeze-thaw cycles and soggy spring melts, finding the best waterproofing in Montreal can save you from a much pricier mess.
Even a small leak can wreck drywall, stored boxes, and your peace of mind before you know it. If water has already made itself at home, professional water damage repair services can help with the cleanup.
But I’d much rather stop the problem before I’m paying for restoration on top of everything else. So I checked out local waterproofing companies to see who offers solid, lasting protection without making homeowners regret opening their wallets.
How much does waterproofing cost in Montreal?
Basement waterproofing in Montreal typically costs around $5,000 to $15,000. Larger exterior excavation jobs can climb to $25,000 or more.
Interior waterproofing usually runs $65 to $185 per linear foot. Exterior waterproofing is pricier at roughly $95 to $275 per linear foot.
Foundation crack repairs can cost about $500 to $2,000 per crack. French drain installation may range from $200 to $400 per linear foot.
A sump pump system generally costs $1,000 to $3,500. Backwater valves are around $1,500 to $3,500, while window wells can cost $1,500 to $3,800.
How We Reviewed
1. Sous-Sol Sécure
Address: 9625 Lajeunesse Street
Contact: 514-561-8747 | [email protected]
Hours: By appointment
Sous-Sol Sécure is a handy pick if your basement problem comes with more than just a little dampness. They handle French drains, crack repairs, sump pumps, crawl-space work, and even foundation reinforcement.
I like that they cover both waterproofing and structural foundation work, so you’re less likely to bounce between different contractors.
Their service area is broad too, stretching across Montreal and surrounding regions up toward Tremblant.
They also offer several waterproofing methods rather than pushing one standard solution. Free inspections and estimates make it easier to figure out what your foundation actually needs before committing.
The catch is that their expertise is heavily centred on basements, crawl spaces, drainage, and foundations. If your moisture problem involves roofing or broader exterior-envelope repairs, you’ll probably need another specialist.
2. DELTA WATERPROOFING
Address: 1155 Rene-Levesque Blvd. West Suite 2500
Contact: 514-9000-910
Hours: 24/7 contact availability
DELTA WATERPROOFING has been around since 1975, which is reassuring when your basement starts behaving like an indoor pond.
They handle both interior and exterior waterproofing, plus sump pumps, drainage systems, crack repairs, and foundation stabilization.
I also like that they have a 24/7 contact line because leaks rarely bother checking business hours first. Their broad service range means you can tackle several foundation and moisture issues with one company instead of juggling specialists.
They’ve also advertised long-term warranty coverage, which adds some peace of mind. Still, I’d confirm exactly what applies to your project before signing anything.
The main catch is that major exterior waterproofing can mean excavation around your foundation, so expect some disruption to your yard and access.
And since Delta operates across several cities, homeowners wanting a small, Montreal-only crew may prefer a more local outfit.
3. Systèmes Sous-sol Québec
Address: 2990 Boul. Le Corbusier, Laval
Contact: 1-514-334-7824 | 1-418-800-8050
Hours: Monday-Friday, 8 AM – 5 PM
Systèmes Sous-sol Québec stands out for using specialized systems from Basement Systems and Foundation Supportworks. That includes products like WaterGuard and CleanSpace, which gives them more than the usual patch-and-pray approach.
I like that they tackle waterproofing alongside foundation repairs, sump pumps, crawl-space work, and drainage. It’s handy if your basement problem comes with a few extra surprises hiding behind the walls.
Their range also makes them a good fit for homes with recurring moisture issues rather than one tiny leak. You’re getting access to systems designed specifically for basements and foundations.
The downside is that proprietary products can make brand-for-brand comparisons harder. And if you’ve only got a simple isolated crack, their broader systems may be more than you actually need.
4. Akton Injection
Address: 19420 B AVE CLARK-GRAHAM, BAIE-D’URFÉ
Contact: 514-694-6622 | 1-888-694-6622 | [email protected]
Hours: By appointment
Akton Injection has been fixing foundation problems since 1976, which is a reassuringly long time to spend keeping Montreal basements dry.
They handle crack injections, French drains, waterproofing membranes, sump pumps, underpinning, and other foundation work.
I like that they use several repair methods instead of treating every leak the same way. Their materials are also selected with Montreal’s rough freeze-thaw climate in mind, which matters when winter starts bullying concrete.
They’re RBQ (Régie du bâtiment du Québec)-licensed, insured, and experienced with both interior and exterior repairs. That makes them a strong pick for homeowners dealing with more than a cosmetic crack.
The catch is that they’re highly specialized in foundation and drainage work rather than general home repairs. Exterior waterproofing can also mean excavation, so expect some disruption around the property.
5. DCR Renovation & Construction Montreal
Address: 3422 Decarie Blvd
Contact: [email protected] | Tel: (514) 699-1355 | Office: (514) 487-1563
Hours: Daily, 7 AM – 9 PM
DCR Renovation & Construction Montreal is useful if your basement problem comes with a renovation wish list attached. They handle waterproofing, French drains, foundation work, mould removal, and basement renovations under one roof.
I like that broader scope because water damage rarely arrives alone or leaves politely. Having one contractor manage both the moisture problem and the repairs can save you from coordinating several trades.
They’re also a practical option for homeowners who want more than a quick patch. Their general renovation background means they can address the space around the problem too.
The downside is that DCR isn’t a waterproofing-only specialist. If you’re dealing with a particularly complex structural foundation issue, you may prefer a contractor focused exclusively on that type of work.
