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Basement Waterproofing Company in Thornton

If water is showing up in your basement, it’s not something to ignore. Leaks rarely fix themselves—and they often return worse if the source isn’t addressed properly.MT Drains & Plumbing provides basement waterproofing in Thornton focused on one thing: finding where the water is coming from and fixing it the right way.No generic systems. No unnecessary work. Just clear answers and long-term solutions.

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Common Basement Water Issues We See in Thornton

Homeowners usually contact us after noticing:

  • Water pooling along the basement floor

  • Damp or stained foundation walls

  • Leaks that appear after heavy rain or snowmelt

  • Moisture around window wells or foundation cracks

  • Musty odours that don’t go away

If water has found a path once, it will usually find it again. The key is stopping it at the source.
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Licenced & Insured Waterproofers

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Offering Waterproofing Services Since 1991

Free On-Site Estimates

How We Approach Basement Waterproofing

Every job starts with diagnosis, not assumptions.
During your inspection, we determine:

  • Where water is actually entering the foundation

  • Whether the issue is isolated or part of a larger drainage problem

  • If an interior solution makes sense—or if exterior waterproofing is required

  • Whether cracks are structural or surface-level

This approach prevents overbuilding and ensures the repair matches the problem.
waterproof membrane installed in Etobicoke basement

We Can Handle All Your Waterproofing Needs

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Interior vs. Exterior Waterproofing — What You Need to Know

There’s no one-size-fits-all solution.

Interior Waterproofing

Often recommended when:

  • Water enters at the wall-to-floor joint

  • Exterior excavation isn’t practical

  • Groundwater needs to be managed, not blocked

Interior systems collect and redirect water safely but don’t stop exterior moisture from reaching the foundation.

Exterior Waterproofing

Recommended when:

  • Water is penetrating through foundation walls

  • Exterior cracks are present

  • Long-term protection is the priority

Exterior waterproofing stops water before it enters the home, making it the most permanent option in many cases.
We explain why a solution is recommended—so you can make an informed decision.

Basement Crack Repair in Thornton

Foundation cracks are common in both older homes and newer builds. Even small cracks can become repeat leak points.
We repair basement cracks using proven methods such as:

  • High-pressure epoxy or urethane injection

  • Exterior membrane repairs

  • Full-length crack sealing when required

All repairs are performed by licensed technicians and backed by warranty.

Why Homeowners Choose MT Drains & Plumbing

  • Licensed and insured waterproofing specialists

  • Serving the GTA since 1991

  • Thousands of completed waterproofing and drainage projects

  • In-house crews — no subcontractors

  • Clear inspections and transparent pricing

  • Solutions designed to last, not just dry things temporarily

We focus on fixing the issue—not selling the biggest system.

Book a Basement Waterproofing Inspection in Thornton

If your basement is showing signs of water intrusion, the next step is understanding why it’s happening.
We provide honest assessments, practical solutions, and professional workmanship—without pressure.
Call Us Now At (905) 761-5551
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FAQ

Do I need interior or exterior waterproofing?
That depends on where the water is entering. An inspection is the only way to know.
Yes. We take steps to protect finished areas whenever possible.
When the source is addressed correctly, waterproofing is a long-term solution.
Only if groundwater management is part of the issue. We’ll explain when it’s necessary.
Coverage varies. We can help explain what’s typically covered and what isn’t.
Have more questions? See our full Basement Waterproofing FAQ page for detailed answers.
Leaky basement being waterproofed in Toronto

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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.

Speak With a Licensed Professional
Have a question about your situation? Our team will review the details and explain the right next step.
Contact Us
Call (647) 370-5325

MT Drains & Plumbing Reviews

Excellent
MT Drains & Plumbing4.9
Based on 213 reviews
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Peter G.
Had a secondary sump pump install which was tied into the existing weeping systems. Team arrived on site, super professional and efficient. Cleaned up and explained everything. Would highly recommended!!!
Walt D.
I asked this company to do an emergency work on a weekend. They attended the very next day and their performance exceeded my expectations. Call them if you need help!
Valeria S.
Great experience with MT Drains & Plumbing in Barrie for our basement waterproofing project. Pavel was knowledgeable, straightforward, and easy to deal with, and the office team was responsive and organized throughout the process. Fair pricing, quality workmanship, and the job was completed professionally. Would definitely recommend MT Drains & Plumbing for basement waterproofing and drainage work.
VIACHESLAV O.
I would like to sincerely thank MT Drain Plumbing for the excellent work they did. The entire team was professional, punctual, courteous, and very respectful throughout the process. Everything was well organized and completed on time. I especially appreciated how carefully they protected the surrounding areas and contained everything to prevent dirt, debris, or other materials from getting where they shouldn’t. The work was completed quickly, efficiently, and to a very high standard. I was also pleasantly surprised by the price — it was significantly lower than the quotes I received from other companies, which made the experience even better. I would also like to mention that the team members who came out to assess and discuss the work with me were extremely polite, professional, and punctual. I highly recommend MT Drain Plumbing to anyone dealing with waterproofing issues, drainage problems, or water management around their home. If you’re looking for a company that provides quality work, fair pricing, and excellent customer service, I definitely recommend giving these guys a call. Thank you again to the entire MT Drain Plumbing team for a job very well done!
Kids I.
We have used Mt Drains & Plumbing services for many years and always have a great experience with this company! The team is very professional, friendly, and arrive on time. We had some plumbing issues, and the work was completed quickly and efficiently. Definitely recommend them both for residential and commercial services.
Anna S.
Excellent service! Guys are very professional and provided very quality service. Prices are extremely reasonable and the job was completed quicker than expected, which is great since my time is very valuable. Very pleased with the detailed explanations and attention to me as a customer. Will recommend MT drains to everyone.
Brandon C.
We have now used MT Drains for the second time as they delivered great work for us. Pavel and his team are very helpful and responsive. They are quick to reply and do a site visit to diagnose the issue. They always provide options and scenarios to help you understand the issue and the solution. I would definitely recommend them for your waterproofing needs. Thanks again to the team!!
Simon S.
Update on August 24 2026: We needed to replace a shower cartridge and it turned out that we also needed to replace our main house water supply shut off valve before the shower job could be done. Olga in the office was very helpful in scheduling the job as well as in dealing with our municipality who needed to be involved as well. When Denis the technician arrived to do the job - early, which I always appreciate! - he assessed the job & dealt with the municipality further to expedite the job. It also turned out that the shower cartridge was badly corroded & required Denis' expert work & his experience to remove it without damaging the fixture. (This is a job the internet says you can do yourself, but when the cartridge is very old & corroded as this was, a professional is required!) He then easily installed the new cartridge. As usual, I was impressed by the professionalism and pleasantness of MT Drains' staff, both in the office & in the field. Update on Dec 17 2024: A toilet in our house came away from the floor in a way that broke the flange it was bolted to. I called MT Drains because they had done a fine repair job in our kitchen a few months earlier (see below). Viktoriya in the office was very friendly & helpful in getting us a cost estimate in a timely fashion and setting up an appointment to fix the problem that fit our schedules. We received email confirmation and reminder of the appointment, and a text confirmation on the morning of the appointment itself. The technician, Amir, arrived a few minutes before the start of the window for the appointment, which I always appreciate a lot! He was friendly, polite and professional. He assessed the repair requirements, confirmed the estimate, and completed the job in a timely manner. Amir also cleaned up everything and even took the garbage away with him. Viktoriya followed up shortly thereafter by phone to check that we were pleased with the job, and then sent the invoice to me for the agreed amount. She also confirmed that they received our payment right away. I’ve used MT Drains’ services for plumbing issues before and will happily use them again! The drain from our kitchen sink was leaking near the place where it attached to the sink itself. The reason turned out to be corrosion that was rotting away the place where the drain pipes attach to the sink. Pavel from MT Drains responded to my Trusted Pros posting within minutes, and was able to have a plumber come that very day. Dima arrived within the agreed time frame. He was polite, friendly, efficient and very skilled at diagnosing the problem and making the repair by replacing the corroded parts. He also cleaned up after his work. Viktoriya in the office was also very helpful and professional - the entire operation was fast, efficient, effective, friendly and professional. I will definitely call on MT Drains for any future plumbing needs.
Nam N.
Perfect service!
Ran P.
I recently had MT Drains & Plumbing Ltd replace the trench drain grate in my driveway, and I couldn't be happier with the results. Pavel and his team were professional, punctual, and highly skilled. The original grate was rusted and had become a safety hazard, but MT Drains provided a seamless replacement that looks fantastic and is incredibly durable. They handled the removal of the old grate and the installation of the new one with great care, ensuring that everything was level and properly secured. It is clear they take pride in their workmanship, as the site was left spotless upon completion. I would highly recommend them to anyone in need of reliable plumbing or drain services.
Sergiy S.
Excellent service
Ken C.
Quality service by an extremely professional team. Would highly recommend.
Alvin H.
We were referred to MT Drains & Plumbing by our plumber as the work that needed to be done to clear our catch basin needed special equipment. They were a pleasure to deal with because: 1. Their quote was clear and comprehensive 2. The response and turnaround time from query to quote was fast 3. Olga made it easy to book an appointment 4. The team dispatched to do the job were professional, did the work and did it in less time than quoted. Overall, a professional outfit that I would recommend.
rahul T.
Amazing service
Ken J.
Our upstairs toilet was not working properly. I called MT Drains & Plumbing and Rene came the same day. He checked out the toilet and found it was not working properly due to age and deterioration of the jets. I asked him if he could supply a replacement toilet. Rene ordered a new toilet and installed it first thing next morning. The new one is working better than the old one ever did. Rene was pleasant to deal with and knew what he was doing. We will use MT Drains in the future.

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