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Basement Waterproofing Services

When water makes its way into your basement, it doesn’t just cause a mess—it threatens your home’s structure, air quality, and long-term value. At MT Drains & Plumbing, we’ve specialized in basement waterproofing for over 30 years across the GTA, helping homeowners and businesses prevent moisture-related damage with proven, effective systems.

This page explains the different types of basement waterproofing, how to spot early warning signs of water issues, and what makes our approach reliable and lasting.
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Your Local Waterproofing Experts

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Why Basement Waterproofing Matters

A damp or leaking basement is more than an inconvenience. Left unchecked, moisture can lead to:
  • Mold and mildew growth
  • Foundation damage and cracks
  • Warped framing or ruined finishes
  • Reduced property value
  • Electrical and safety risks

Waterproofing prevents these outcomes by stopping moisture at the source—whether that’s from surface runoff, poor drainage, or hydrostatic pressure underground.

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Toronto Basement Underpinning
Finished Interior Basement Waterproofing

Exterior Waterproofing

Interior Waterproofing

  • Installs drainage systems and sump pumps inside the basement
  • Typically less invasive and more cost-effective
  • Good for managing water already entering or in cases where exterior work isn’t possible
Not sure which method is right for your home? Our team provides on-site assessments to recommend the best solution for your specific foundation type, soil condition, and property layout.

Signs You May Need Waterproofing

Waterproofing isn’t just for flooded basements. Call us if you notice:

Efflorescence on Basement Walls

White, chalky residue on concrete or brick is a sign that moisture is evaporating through your foundation.

Musty smells or visible mold

Persistent dampness creates the perfect environment for mold and mildew, often indicating moisture intrusion behind walls or under flooring.

Peeling paint or bubbling drywall

Interior finishes that peel or warp are often signs of trapped moisture—commonly caused by water seeping through walls or ceilings.

Water pooling near your home’s foundation

Standing water around the exterior of your home may point to poor grading, clogged drains, or failing waterproofing systems.

Hairline cracks in your basement floor or wall

Even small foundation cracks can allow water to seep in, leading to basement leaks and long-term structural problems.

Sump pump that runs constantly or not at all

A constantly running or non-functioning sump pump may signal poor drainage setup, mechanical failure, or an overwhelmed system.
The earlier you act, the more cost-effective the fix.

MT Drains & Plumbing

Our Waterproofing Systems

At MT Drains & Plumbing, we install comprehensive systems based on your basement’s unique conditions. Our waterproofing solutions may include:

sump-pump-in-basement-that-is-constantly-running

Sump pump installation or upgrades

Install new or higher-capacity sump pumps to keep basements dry during heavy rain.
finished waterproofed basement

Basement Underpinning

Strengthen and deepen your home’s foundation to add space and improve structural support.

Weeping tile or French drain installation

Install perimeter drainage systems that redirect groundwater away from your foundation walls.
Sealant being applied by MT Drains technician

Basement Crack Repair

Seal foundation cracks to stop water infiltration and prevent structural damage.
Window well and drainage installed in Toronto

Window Well Drains & Covers

Install drains and protective covers to prevent water buildup around basement windows.
water coming up through basement floor

Leaky Basement Repair

Identify and repair leaks at their source to restore a dry, healthy basement.
Basement Lowering

Basement Lowering

Increase basement ceiling height and usable living space by lowering the foundation floor.
Basement Floor

Bench Footing

Support new basement floor depths with structural bench footings around foundation walls.
All work is performed by licensed, insured technicians and backed by long-term warranties.

Why Choose MT Drains for Waterproofing?

  • 30+ Years in Business: We’ve handled thousands of waterproofing projects across the GTA 
  • Full-Service Team: We’re not just a waterproofing company—we also repair foundations, replace drainage, and handle all related plumbing needs.
  • Transparent Estimates: Every quote is detailed and based on real site conditions. No guesswork or hidden fees.
  • Homeowner Trust: Read our hundreds of 5-star reviews from clients who’ve relied on us to keep their basements dry.
interior drain tile covered with new cement

A Few Basement Waterproofing Projects

Discover our expert services and top-grade materials that ensure your basement stays dry and protected. Trust our proven solutions for effective and lasting waterproofing.
exterior basement waterproofing project in Etobicoke

Exterior Waterproofing Etobicoke

MT Drains recently performed an exterior waterproofing job in Etobicoke. The property had a significant structural issue that had to be addressed quickly. The Need

interior waterproofing project in Midtown

Interior Waterproofing in Midtown

Recently, we provided interior waterproofing in midtown Toronto, and we’re really proud of the results. Here are a few details about the job and the

crack repair in basement foundation project in Stouffville

Exterior Waterproofing Stouffville

Exterior waterproofing can solve many problems, like foundation cracks and constant condensation on basement windows. Not too long ago, a homeowner called us and requested

More Projects
waterproof membrane installed in Etobicoke basement

Benefits of Basement Waterproofing

Waterproofing your basement provides a wide range of benefits that go beyond just keeping your basement dry:

  • Protects Foundation: Prevents water from damaging your foundation, avoiding expensive structural repairs.
  • Prevents Mold and Mildew: Minimizes the risk of mold growth, creating a healthier environment for your family.
  • Increases Home Value: Boosts your property’s market value by maintaining its structural integrity and longevity.
  • Provides Peace of Mind: Ensures your basement is safeguarded against leaks and moisture, giving you confidence in your home’s protection.

Investing in waterproofing solutions keeps your home safe, dry, and valuable for years to come.

Learn More by Location

We tailor our waterproofing services by region due to differences in soil, rainfall, and home construction. Explore localized information:

Need Advice?

If you’re noticing musty smells, wall stains, or signs of water seepage, it’s worth understanding what’s behind them. MT Drains & Plumbing has decades of experience assessing foundation moisture and drainage issues. We’re here to help you make sense of your options—whether the fix is minor or something more involved.

FAQ

How much does basement waterproofing cost?
Interior waterproofing typically costs $80–$240 per linear foot, while exterior systems range from $150–$350 per linear foot. The exact price depends on your foundation type and the extent of water intrusion.
Yes. Waterproofing is preventative—addressing cracks, poor drainage, or moisture before leaks appear helps avoid costly repairs and mold growth.

  • Interior waterproofing manages water after it enters, using drains and sump pumps.

  • Exterior waterproofing blocks water from reaching your foundation, offering long-term protection.

Yes, MT Drains offers long-term, transferable warranties on our basement waterproofing services, giving you peace of mind and added resale value.

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

Leaky basement being waterproofed in Toronto

Blog

Our Waterproofing Blog
Contact Us at MT Drains & Plumbing!
If you have any questions or concerns about our services, please don’t hesitate to give us a call at (647) 370-5325. Our friendly and knowledgeable team is always happy to help. Whether you need emergency service or have a question about a planned project, we’re here to assist you. Thank you for choosing MT Drains & Plumbing.
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MT Drains & Plumbing Reviews

Excellent4.8★★★★★ Based on 182 reviews from review us onmarshellmarshell ★★★★★ Very happy with the service. The team worked fast and gave us peace of mind that our basement won’t flood again.LissaLissa ★★★★★ Had a leak in my basement after a heavy rain. MT Drains came quickly, diagnosed the problem, and waterproofed the foundation. Haven’t had a drop of water since.Connie J.Connie J. ★★★★★ I had a leak in my bathroom that involved replacing old pipes and taps. I am very pleased with the timely and professional service.Nolan A.Nolan A. ★★★★★ After noticing water coming through a wall during heavy rain, we contacted MT Drains for waterproofing. Pavel came by for the estimate and thoroughly explained our options. His crew was fantastic—respectful of our property and hardworking. They waterproofed the entire affected wall from the outside, and we've had zero issues since. We’re very impressed and grateful!Daniela C.Daniela C. ★★★★★ Had a major clogged drain issue in our basement laundry area, and MT Drains came to the rescue. Eddie was the technician and he was incredibly helpful—he diagnosed the issue right away, explained what needed to be done, and cleared the blockage quickly. The whole process was smooth and much less stressful than I expected. Great team, great service!Paxton B.Paxton B. ★★★★★ We’ve used MT Drains multiple times over the past few years at our home in Richmond Hill, and they’ve always delivered excellent service. Most recently, they helped with a leaking pipe and some fixture replacements. They arrived on time, explained the work before starting, and left everything clean afterward. It's great to have a plumbing company you can truly rely on—professional, honest, and efficient every time.Paul A.Paul A. ★★★★★ We are repeat customers of MT Drain Richmond Hill and could not be happier with their services. Our first experience with them involved basement waterproofing, and we have had no issues with it for the past six years, even during periods of heavy rainfall. In addition, they provided us with gorgeous window-well covers that have attracted inquiries from friends and neighbors. Beyond their excellent work, the team is punctual, budget-friendly, and extremely courteous. They also prioritize property protection and ensure that no damage is incurred. Communication is excellent, and they follow up promptly, demonstrating their professionalism.Paul A.Paul A. ★★★★★ For some time, our basement had been experiencing water leakage after rain showers. The issue persisted, and with every passing storm, the leaks became more severe, leaving me feeling anxious. After researching online for a reliable company, I discovered Mt Drains. I reached out to them and was pleasantly surprised by how promptly they responded and came to assess the situation. The technician who attended to us was not only personable but also provided us with the best solution to our problem. The workers who carried out the job were equally professional and friendly, and upon completion, the area looked better than it did before. I am highly satisfied with their services and will undoubtedly recommend them to anyone in need.Mihail M.Mihail M. ★★★★★ Guys did an amazing job , fixing leak in the basement . Very professional job . Thanks againValeria S.Valeria S. ★★★★★ We called MT Drains & Pluming after a leak in the basement after heavy rain. The team was courteous and very professional. We ended up hiring Pavel for external basement waterproofing. The job was done on time and the price was reasonable.Anton PAnton P ★★★★★ Great company to deal with. Had leaking basement, called them and they came next day. Started working in 2 days and finished all in 3!weeks. Highly recommend.js_loader