Water is the single most damaging force acting on residential and commercial property in Montreal. The freeze-thaw cycles that define our winters, the spring thaw that saturates the soil, the summer storms that overwhelm drainage systems — all of these create relentless pressure on foundations, basements, and building envelopes that, left unaddressed, leads to structural damage, mold, and costly remediation. MTL Waterproofing exists to stop water in its tracks — before it becomes a problem you cannot ignore.

We are a Montreal-based waterproofing and foundation protection company serving homeowners, property managers, and real estate investors across the island and the greater metropolitan area. Our team of licensed technicians specialises in the full range of waterproofing solutions: interior drainage systems, exterior foundation waterproofing, basement wall crack injection, sump pump installation and maintenance, window well drainage, and exterior grading correction. We diagnose the source of the problem, not just the symptom — because a wet basement always has a cause, and treating the cause is the only approach that actually works.

What sets MTL Waterproofing apart in a crowded market is the depth of our diagnostic process. Before we recommend any solution, we conduct a thorough inspection of the property — examining the foundation, the drainage conditions, the grade around the building, and the interior of the basement or crawl space. We look for the path water is taking to enter the structure, and we address it at that point. This approach means our solutions last rather than simply delaying the same problem by a few years.

We work in both French and English, which matters in a city where communication between contractor and client can otherwise become an obstacle. Our estimates are written clearly, our pricing is transparent, and we explain every recommendation in terms our clients can evaluate for themselves. No pressure sales tactics, no unnecessary upselling — just honest assessment and quality workmanship backed by written guarantees.

MTL Waterproofing works with owners of single-family homes, duplexes and triplexes, commercial buildings, and rental portfolios. For property investors, we also offer pre-purchase inspections and remediation assessments to help evaluate a property’s moisture risk before acquisition — a service that has saved more than a few clients from expensive post-purchase surprises.

Montreal’s winters are not going anywhere. Neither is water. MTL Waterproofing makes sure it stays outside where it belongs.