Basement Waterproofing In Markham

Water in your basement is never something to ignore. Whether it’s damp walls, visible leaks, or water pooling on the floor, the real risk isn’t just the mess — it’s what happens if the issue keeps coming back.

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.

Licensed and insured. With decades of experience.

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.

You should book an inspection if you notice:

Water entering during heavy rain or snowmelt
Damp or stained basement walls that never fully dry
Cracks that leak repeatedly in the same location
Water collecting near the floor–wall joint
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

Most homeowners in Markham reach out after noticing the same issue repeat itself. The most common problems we see include leaks reappearing in the same location after rainfall, moisture forming behind finished basement walls, and water entering through basement windows during storms.

In many cases, previous repairs focused on redirecting water instead of stopping it at the source. That’s why leaks often come back months or years later.

Our role is to identify why water is getting in and whether past fixes actually addressed the problem—or just delayed it.

"I Would Recommend MT Drains For Waterproofing"

We had the pleasure of working with Pavel and his team of waterproofers. Our basement wall crack was causing a leak in the basement. Pavel came the same day to investigate the issue, the guys did an amazing job and it like there were never here. I would recommend Pavel for waterproofing and plumbing to everyone.

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

Before recommending any repair, we focus on diagnosis.

Our inspections are designed to determine:

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

This approach prevents unnecessary work and helps you make an informed decision — not a rushed one.

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

Often used when:

Exterior access is limited
Water enters at the floor-wall joint
Managing groundwater is more practical than excavation

This method redirects water safely to a sump system but does not stop exterior water from reaching the foundation.

Exterior Waterproofing

Recommended when:

Water is penetrating through foundation walls
Cracks are visible on the outside
Long-term protection is the priority

Exterior waterproofing stops water before it enters the home and is often the most permanent solution.

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?

Rather than guessing price ranges, it’s more helpful to understand what actually changes cost:

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

During your inspection, we explain these factors clearly so you understand where the cost comes from — and where it doesn’t.

Book a Basement Waterproofing Inspection in Markham

If your basement is showing signs of water intrusion, the next step is understanding why — not guessing.

MT Drains & Plumbing provides professional basement waterproofing inspections in Markham with clear answers and practical solutions.

Call today or request an on-site assessment.

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

No pressure. No vague recommendations.

Markham Basement Waterproofing Projects

We regularly work throughout Markham on:

Foundation crack repairs
Exterior waterproofing along problem walls
Window well and drainage upgrades
Sump pump installations and replacements

Each job is approached based on the home — not a template.

Why Homeowners in Markham Choose MT Drains

Experience That Shows

We’ve handled thousands of waterproofing and drainage projects across the GTA. That experience helps us spot problems others miss.

Licensed, Insured, Accountable

Your home and investment are protected from start to finish.

Work That Lasts

Our repairs are designed for long-term performance, not temporary relief.

FAQ

Do I need interior or exterior waterproofing?

It depends on where the water is entering. That’s why inspection matters.

Can you waterproof a finished basement?

Yes. We take steps to protect finished areas and minimize disruption.

Will waterproofing stop leaks permanently?

When the correct method is used, yes. Mismatched solutions are the reason leaks return.

Do I need a sump pump?

Only if water management is required. Not every home needs one.

What happens if I delay repairs?

Leaks often worsen and spread, increasing repair scope and cost.

Have more questions? See our full Basement Waterproofing FAQ page
for detailed answers.

Markham Flood Protection Subsidy

The City of Markham offers financial incentives for flood protection upgrades, including sump pumps and backwater valves. We can explain whether your home qualifies and how waterproofing fits into that picture.

Blog

Why Does My Basement Sump Pump Smell Bad?

June 6, 2025

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?

June 6, 2025

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

February 8, 2024

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,