MT Drains & Plumbing provides professional basement waterproofing in Markham with one goal: identify the real source of the leak and fix it properly the first time. No guesswork. No upselling solutions that don’t fit your home.
Licenced & Insured Waterproofers
24/7 Availability
Decades of hands-on experience
Free On-Site Estimates
Is Your Basement Problem Serious?
Not every basement issue requires full waterproofing — but some absolutely do.
Water entering during heavy rain or snowmelt
Damp or stained basement walls that never fully dry
Cracks that leak repeatedly in the same location
Musty odours that persist year-round
Temporary dryness does not mean the problem is gone. Many Markham homeowners only call after a second or third leak — when repairs become more involved.
Request a Service Call
Need Help Fixing Your Leaky Basement?
Common Basement Leak Problems We See in Markham Homes
"I Would Recommend MT Drains For Waterproofing"
Common Waterproofing Mistakes That Cause Repeat Leaks
We’re often called in to correct work that didn’t last. Common issues include:
Interior drainage installed when the leak source was outside
Crack injections used on foundations that continue to move
Sump pumps added without sealing entry points
Repairs that redirect water instead of stopping infiltration
A waterproofing system should match the problem—not the other way around. The wrong solution can be just as costly as no solution at all.
How We Find the Real Source of the Leak
Where water is actually entering the foundation
Whether the issue is isolated or part of a larger drainage problem
If exterior waterproofing is required or if an interior solution is appropriate
Whether cracks are structural or surface-level
How the repair will affect the rest of your basement long term
Choosing the Right Waterproofing Solution
There’s no one-size-fits-all answer. The right approach depends on where water is entering and how your home is built.
Interior Waterproofing
Exterior access is limited
Water enters at the floor-wall joint
Managing groundwater is more practical than excavation
Exterior Waterproofing
Water is penetrating through foundation walls
Cracks are visible on the outside
Long-term protection is the priority
Hybrid Solutions
In some cases, combining methods provides the best outcome. We explain why — not just what.
What Affects the Cost of Waterproofing in Markham?
Interior vs exterior access
Length and depth of excavation
Foundation type and condition
Whether finished spaces need protection or restoration
Drainage system modifications
Sump pump or backwater valve integration
Book a Basement Waterproofing Inspection in Markham
What to Expect When You Hire MT Drains
On-site inspection and leak tracing
Clear explanation of findings and options
A recommended solution with defined scope
Scheduled work based on conditions and access
Clean job site and final walkthrough
Markham Basement Waterproofing Projects
Foundation crack repairs
Exterior waterproofing along problem walls
Window well and drainage upgrades
Why Homeowners in Markham Choose MT Drains
Experience That Shows
Licensed, Insured, Accountable
Work That Lasts
FAQ
Do I need interior or exterior waterproofing?
Can you waterproof a finished basement?
Will waterproofing stop leaks permanently?
Do I need a sump pump?
What happens if I delay repairs?
Have more questions? See our full Basement Waterproofing FAQ page
for detailed answers.
Markham Flood Protection Subsidy
Blog
Why Does My Basement Sump Pump Smell Bad?
A foul smell coming from your sump pump isn’t just unpleasant—it can point to a maintenance issue, a drainage problem, or even potential health risks. Here’s what causes that smell and what steps you should take to eliminate it.
Efflorescence Streaks on Basement Walls: Cosmetic Issue or Water Intrusion?
Efflorescence is a common issue in concrete and masonry basements. It shows up as white, powdery streaks or flakes on the wall surface. In many cases, it’s just a cosmetic concern—but it can also indicate ongoing moisture problems.
Here’s how to assess what you’re dealing with and when it’s time to act.
Why Your Basement Leaks in Heavy Rain—and How to Fix It
Heavy rain increases groundwater levels around your home. When water builds up against the foundation, it exposes weak points. If your basement leaks during storms,
