At McDowell Drain & Waterproofing, we specialize in diagnosing and providing effective waterproofing solutions to wet basement problems for homeowners in Niagara and surrounding areas. Contact us today to learn more about how we can help!
Interior basement waterproofing is essential for managing water that has already entered your home’s foundation. This solution is ideal for Canadian homes that experience high groundwater levels, heavy rain, or snowmelt, all of which can lead to basement leaks. Without proper waterproofing, you risk:
Interior waterproofing offers a dependable and long-lasting solution to protect your basement from moisture buildup, leaks, and potential structural damage. By effectively managing water intrusion from inside your home, it helps maintain a dry, secure, and healthier living environment for you and your family. When combined with professional Foundation Services, you can address underlying structural concerns, while advanced methods like Advanced Waterproofing Solutions ensure efficient drainage and enhanced protection against future water issues.






At McDowell Drain & Waterproofing, we use advanced materials and systems to effectively manage water from the inside:
Perimeter Drainage System
A trench is installed along the interior perimeter of the basement floor.
Drain tiles collect water seepage and redirect it to a sump pump system.
High-Performance Sump Pumps
Installed to remove collected water, sump pumps discharge it safely away from your home.
Our sump pumps feature backup systems to ensure operation during power outages.
Waterproof Wall Treatments
Protective membranes and vapor barriers are applied to the interior walls to block moisture and keep the space dry.
Crack Repairs
Foundation cracks are sealed with industrial-grade epoxy or polyurethane injections to stop leaks and prevent further structural damage.



Our Process
At McDowell Drain & Waterproofing, we go beyond traditional interior waterproofing by integrating advanced systems that not only stop water but also enhance the durability of your home’s foundation. Our process ensures that water is efficiently managed and redirected, creating a dry, safe, and mold-free environment.

Comprehensive Drainage Systems
We install advanced perimeter drain tiles along the interior walls of your basement, designed to capture and redirect any water seepage.
High-Performance Sump Pumps
Our sump pumps are equipped with advanced features such as backup power systems to ensure consistent performance, even during power outages.

Waterproof Wall Treatments
We apply heavy-duty protective membranes and vapor barriers on your interior walls, ensuring no moisture penetrates your living space.
Advanced Crack Repair Solutions
Foundation cracks are repaired using industrial-grade epoxy and polyurethane injections that not only seal leaks but also strengthen the foundation.

Customized Floor Drain Systems
We design floor drain systems tailored to your basement layout, ensuring efficient surface water management and preventing flooding.
McDowell Drain & Waterproofing is the trusted choice for Interior Waterproofing in Niagara and surrounding regions. Here’s why:
Exclusive Materials
We use cutting-edge materials, including high-grade membranes, sealants, drainage boards, and sump pumps, all engineered for longevity and water resistance.
Innovative Techniques
Our proprietary techniques ensure a seamless installation process that is minimally invasive yet highly effective.
Long-Term Protection
Every system we install is designed to stand the test of time, safeguarding your basement for decades.
24/7 Emergency Support
Water problems can arise at any time, and our team is always ready to assist with advanced solutions.
We are proud to have earned the trust and confidence of our customers through our commitment to excellence and exceptional service.
We had some drainage issues and called McDowell Drain & Waterproofing. It was GREAT service, he called me right back and was here within 2 hours. Solved the problem and haven’t had any issues since. On top of great service, Stuart was very friendly, helpful and knowledgeable! I would highly recommend and will certainly be calling him for any plumbing issues we may have in the future!:)
Sara Swayze
Professional from first contact to job completion. Job was to install a sewer backwater valve but once the floor was opened, it was evident that a sump pump installation was also required. Quickly pivoted to accommodate the additional work scope and still meet the timeline completion. Stuart, the owner is knowledgeable, professional and puts you at ease. Alex the installer did great work and paid attention to details. He was always receptive to any questions or concerns. Would not hesitate to recommend them for your plumbing needs.
David North
MCDOWELL DRAIN & WATERPROOFING, led by Stuart, truly stands out in the professional field. As someone with experience in spotting professionalism, I was thoroughly impressed by Stuart’s ability to listen attentively and resolve the issue promptly as promised. His honesty and competitive pricing, coupled with the high quality of his work, make him a standout choice for any drain and waterproofing needs. I wholeheartedly recommend him to anyone seeking top-notch service in this field!
Nancy Heckman
Services Offered
Phone Number
Email Address
Posted on Google![]()
Laurence StevenTrustindex verifies that the original source of the review is Google.
Stuart McDowell and his team deserve the five star rating! In the aftermath of the two deluges north St. Catharines experienced in August 2026 we were left reeling. Stuart responded promptly to our call for a site visit and estimates. He helped us develop and put in place a water mitigation plan for both our interior and exterior needs. Despite being run off his feet with calls across the affected region of the city, Stuart kept us in the loop. We love our 1952 vintage cottage home and McDowell Drain and Waterproofing have helped us make it able to resist the storms that will surely come in the future.Posted on Google![]()
Anthony STrustindex verifies that the original source of the review is Google.
Stu came by after we noticed hydrostatic pressure and water in the basement. He spent over an hour of his own time making sure he had the right diagnosis of what was causing the pressure and came up with the most effective and cost efficient solution. He is honest, thorough and explained his solution. Crew came by within a few days right before a major storm and they were clean and quick. No more water and we can sleep easy at night knowing we don’t have to wake up to any more surprises in the basement. Give Stu a call for any waterproofing services, I’m happy we did.Posted on Google![]()
John MacLeodTrustindex verifies that the original source of the review is Google.
Stuart is a professional. His crew did expert workmanship in installing new weeping tile and sump pump in a timely manner. I would highly recommend McDowell Drain & Waterproofing.Posted on Google![]()
Eric TrogdonTrustindex verifies that the original source of the review is Google.
Awesome service. Very professional. Honest suggestions and recommendations. Saved me money and helped me sleep better at night. Very quick to respond after I left a message on the website. Thank you very much!Posted on Google![]()
racquel calaraTrustindex verifies that the original source of the review is Google.
Exceptional Service and True Professionalism! We had an outstanding experience with McDowell Drain and Waterproofing. The owner, Stuart McDowell, came out to our house personally to look at our water issue. What impressed us right from the start was his thoroughness—he took the time to completely investigate and determine the root cause of the problem before offering any recommendations. Stuart was incredibly determined to find the right, long-term solution for us. It is rare to find someone so dedicated to their craft. Beyond his technical expertise, he is a true gentleman and a consummate professional. It’s also very clear that he runs his business with high integrity; he is incredibly fair to both his clients and his workers. If you are looking for an honest, professional, and highly skilled waterproofing company, I cannot recommend Stuart and his team highly enough!Posted on Google![]()
bruceTrustindex verifies that the original source of the review is Google.
I am writing this review to commend Stuart for his honesty. My neighbour and I had an issue with draining from our window wells. Stuart explained how the drain works and it was probably a matter of water overload rather than a plugged drain. With our lack of knowledge Stuart could have convinced us to engage in an expensive excavation. He values his integrity and we value businesses with this type of leadership.Posted on Google![]()
D MTrustindex verifies that the original source of the review is Google.
This company is fantastic, Stuart arrived on time and immediately solved our sump pump issue. I will be recommending this company to anyone with drain service issues. 5 starsVerified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
USP | Details |
|---|---|
| 45+ Years of Proven Industry Experience | McDowell Drain & Waterproofing has been protecting homes for over four decades—experience that cannot be replicated. |
| 20-Year Written Warranty on Waterproofing Systems | Long-term protection backed by a 20-year warranty, not short-term promises. |
| 3,500+ Successfully Completed Projects | Thousands of waterproofing and drainage projects completed across residential properties. |
| Niagara Region Specialists | Deep expertise in local soil conditions, water tables, and aging infrastructure unique to the Niagara Region. |
| Complete Drainage & Waterproofing Solutions | Interior waterproofing, exterior waterproofing, drain repair, sump pumps, backwater valves—handled by one expert team. |
| Permanent Fixes, Not Temporary Repairs | Root-cause solutions that stop water problems permanently, not seasonal patchwork. |
| Honest Diagnostics & Clear Explanations | Homeowners receive transparent inspections with practical recommendations—no scare tactics. |
| Trusted by Local Homeowners for Generations | A reputation built through decades of consistent workmanship and word-of-mouth trust. |
| Clean, Respectful, Professional Worksites | Work completed with care for the home, landscaping, and living space. |
| Fast Response for Drainage & Water Emergencies | When water threatens your home, McDowell responds quickly to limit damage. |
It includes drainage systems, sump pumps, and vapor barriers to manage water already entering the basement.
By removing excess moisture, it creates a dry environment where mold cannot grow.
By removing excess moisture, it creates a dry environment where mold cannot grow.
Interior waterproofing manages water already in the basement, while exterior waterproofing prevents water from reaching the foundation.
Costs vary based on basement size and system complexity. Contact McDowell for a free estimate.
Yes, sump pumps are often integral to our waterproofing systems.
Properly installed systems can last decades with minimal maintenance.
How long does interior waterproofing last?