GJ MacRae Foundation Repair

The Original Wetbasements Experts – Since 1975

Basement Waterproofing

GJ MacRae Foundation Repair is an award-winning, second generation family-run Basement Waterproofing company based in Toronto and serving the Greater Toronto Area since 1975.

Our Services Are Trusted By

the highest quality basement waterproofing services in toronto

Hand Excavated Basement Waterproofing

Whether you live in Oakville, Hamilton, or Downtown Toronto, the Greater Toronto Area sees its fair share of rain and snow. This, along with other factors, can result in groundwater buildup and the subsequent hydrostatic pressure, which may push water through cracks in concrete foundations, compromised foundation walls, and damaged weeping tile systems, potentially causing basement flooding. These concerns demand careful waterproofing and drainage considerations and are rarely implemented in residential building envelopes during original construction. This is where GJ MacRae Foundation Repair, the leading basement waterproofing company in Toronto, can help.

Founded in 1975, we are local basement waterproofing specialists serving the Greater Toronto Area. As a second generation family owned business, we have extensive industry knowledge and experience and are equipped with industry-leading structural repair methodologies that provide the highest quality foundation repair service available today. Our highly skilled and trained staff have delivered top-notch, dependable basement waterproofing services in Toronto for nearly 50 years. Using leading-edge techniques and best practices, we tackle all phases of waterproofing issues in the Toronto area, such as leaky basements, damp walls, basement underpinning, and full structural foundation wall replacements.

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Who is GJ MacRae Foundation Repair?

GJ MacRae is a second-generation, family-run, full-service basement foundation repair and waterproofing company serving the Greater Toronto Area since 1975. After nearly 50 years in business, we have established ourselves as the premier basement waterproofing company in the GTA. We will work with you to understand your project needs and find the best solution for damaged foundation walls or leaking basements.

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If you’re from the Greater Toronto Area and need exceptional basement waterproofing services, count on us for leading basement waterproofing in Toronto. With nearly five decades of experience, we specialize in foundation repair and basement waterproofing, ensuring the long-term security of your home’s concrete foundation walls. Our reliable exterior and interior waterproofing solutions come with the best warranty in the business and are offered throughout the GTA, including Oakville, Mississauga, Burlington, Hamilton, Milton, Georgetown, and Scarborough. Operating year-round, even in the winter, we provide timely basement leak repair services to safeguard your home from sudden leaks or foundation damages. Our experience of nearly 50 years gives us confidence in our ability to deliver a dry, usable basement to protect your home’s foundation for the long run, so contact us today for a free estimate.


Industry Leading Foundation Repair and Basement Waterproofing Services Since 1975


Say goodbye to leaky basements because we specialize in basement waterproofing in Toronto for below-grade concrete blocks, poured concrete, field stone, and rubble stone foundation walls. With nearly 50 years of service, getting a dry basement backed by the most reliable warranty in the GTA is just a phone call away.


Is there a crack in your poured, block, or rubble stone foundation wall, and is this crack allowing water to leak into your basement? Why do interior crack injection methods simply not work? Trust the experts and see why GJ MacRae carries the most reliable foundation crack repair warranty in the business.

weeping tile system

A century-old technology reborn! Our services also include interior and exterior weeping tile systems coupled with deep insights and experience relating to drainage. Ask us about the difference between interior and exterior drainage methods and enjoy the benefits of our extensive expertise.

window wells

Basement windows are a great natural light source and can act as a designated fire escape, but what happens when window wells deteriorate, clog, and leak? Our hand-excavated exterior window well repair solutions are permanent and allow for guaranteed unimpeded drainage all year long.

sump pumps

Sump pumps and sump basins are integral to all below-grade drainage strategies due to their simplicity, reliability, low cost, and proven effectiveness. Ensure your sump pump, basin, and battery backup system are well maintained and ready for the next significant rain or thaw.


We also specialize in structural foundation shoring, concrete footing and replacement, concrete foundation wall reinforcement and replacement, structural underpinning installations, and all phases of below-grade concrete foundation repair, reinforcement, and rebuilding.

Crumbling Foundations

Are your foundation walls spalling, eroding, or fragmenting? Is this damage accelerating through the years? Stopping moisture penetration through your above-grade concrete structure is imperative. We offer brush parging, s-type, adhesive, mesh, fiber, and thermal-slurry solutions for a lasting barrier.


GJ MacRae pioneered the overflow underpinning method in the Greater Toronto Area. Our underpinning process allows for safe, reliable vertical increases in basement ceiling height that can turn crawl spaces into full living quarters for less cost than a standard second-story addition!

carbon fiber

When your foundation walls begin to show signs of cracking or bowing, it’s generally an indication of severe exterior lateral pressure from roots, hydrostatics, or poorly draining soil. Click below to learn more about our complete carbon fiber foundation reinforcement applications.

When Should You Hire a Basement Waterproofing Company in Toronto?

If you consistently notice water pooling in your basement or wet spots on the walls or floor, it’s an indication that you may need basement waterproofing. A professional Toronto basement waterproofing company can identify the source of the problem and provide appropriate solutions to prevent further water damage.

Visible cracks in basement walls or concrete foundations can be potential entry points for water. Ignoring these cracks can lead to significant structural damage over time, so it’s prudent to have your foundation waterproofed if cracks are detected. Reaching out to a reputable waterproofing company will help to prevent water from seeping in and causing damage.

If you smell persistent musty odors or feel the presence of moisture in your basement, this could indicate a basement leak or foundation issue. It’s best to get the advice of a professional Toronto basement waterproofing team to evaluate your basement before any further damage occurs.

If you plan to renovate your basement or create a livable space, addressing any existing or potential water issues beforehand is crucial. A basement waterproofing company can assess the space, identify vulnerabilities, and recommend the necessary waterproofing measures to ensure a dry and comfortable living area.

No matter how beautiful your home is, if the concrete foundation walls are not adequately protected and structurally sound, none of the beautiful renovations to the upper floors will matter in the long run! Having robust concrete foundation walls is a must for any home or structure. So, if you have a foundation crack in your home, call us immediately. 

If you’ve noticed mould or mildew in your basement, it’s important to take immediate action. Mould not only compromises the quality of indoor air, but it can also cause health issues. To address the underlying moisture issue and prevent mould growth, it’s recommended to seek help from a trusted basement waterproofing company.

What are the Consequences Of Ignoring Basement Walls Leaks?

Are you seeing water leaks in your basement but ignoring them because they seem minor? What looks like a few wet spots on the wall now can burn a huge hole in your pocket if you ignore the leaky walls.

Paying no heed to the leaky walls will weaken the structure over time. The hydrostatic pressure will widen the cracks, causing structural instability and damage to the integrity of your home’s foundation.

Damp walls and moisture in the basement are perfect hosts for mold and mildew growth. Mold and mildew not only hamper the aesthetics of your property but also accompany serious health issues such as respiratory problems and allergic reactions.

Ignoring waterproofing work for way too long widens the cracks for water to seep in through and weakens the foundation inch by inch. Worst case scenario: prolonging the water leak issues might lead to complete structural failure.


Why Choose GJ MacRae?

inside basement waterproofing

Protect Your Foundation

Check Out Our Local Waterproofing Projects in Toronto and the GTA!

Look no further for the best waterproofing solutions in Toronto! We’re thrilled to present our latest completed projects, showcasing our uncompromising commitment to excellence. These featured Toronto waterproofing projects display our expertise and dedication to delivering superior services. Click on each project to access detailed images and additional information about the techniques and materials we’ve used. Whether you’re a homeowner, business owner, or property manager, take a moment to explore the remarkable transformations that we’ve achieved in Toronto. Don’t miss out on witnessing firsthand how our waterproofing solutions can safeguard and enhance your property.


Some Kind Words From Our Customers

Anthony Brown
Anthony Brown
We had a leak from two sources in our furnace room, that occurred after a moderate to heavy rainfall. We hired GJ Macrae to excavate by the outside wall, repair the cracks and protect the wall with a membrane and mesh. Part of the trench had to be dug by hand, due to a gas line, and part could be done by machine. The GJ Macrae team were all very skilled and professional, and completed the job in three days. Now the trench has been refilled with the earth and gravel and it will take some time for the ground to settle. We have had a few heavy rains since the job was completed, and our basement is now completely dry! We highly recommend GJ Macrae!
Robert Sraka
Robert Sraka
From our initial discussion with Dean through to the completion of the project I was most impressed with knowledge and professionalism. We had foundation damage from a tree root and they took the time to explain what was required and the steps involved in rectifying the situation. I highly recommend GJ MacRae for any foundation work you may need.
Wendy M
Wendy M
The extremely labour-intensive work done on our heritage home basement by the staff at GJ MacRae was nothing but impressive! They handled it all with great care, attention and finesse every step of the way. Thank you!
Lisa Nicholson
Lisa Nicholson
Our experience with Gavin went very well. We are very pleased with the quality of work that was done. They did an excellent job repairing the leaks and the cleanup was great too. Gavin was a pleasure to deal with. He was very professional and pleasant. We highly recommend this company.
Stephanie Williams
Stephanie Williams
Honest, courteous, thorough, professional, reliable, on-time, clean and trustworthy. Solved our home’s basement water concerns caused from living on the flood plain (water table). Would definitely recommend GJMacRae Ltd as the company to fix your wet basement. Dean and his crew’s attention to detail solved the various challenges of our 91 year old home.
Maria Aleman
Maria Aleman
Dean, came out right away after we noticed water in our basement and provided an estimate. Communication with him was easy and he answered all my questions. Work was done within the week. I had a great experience and will recommend to others.
Jakob Backstrom
Jakob Backstrom
Gavin and his team did a great job. Right from quoting the job I had confidence they can do the job well and had the experience. Great videos on their website really help you understand what’s involved in foundation repair.
Job was done in 2 days which I was amazed it could be done that quickly! That’s a lot of pails of concrete and rock that had to be shuttled in and out of the house! The guys were all very friendly and let me know everything that was being done and answered all my questions! The bowed wall looks solidly supported now with carbon fibre strapping and the water found beneath the floor is now being safely routed through newly installed Plastic Weeper to our sump. We now have peace of mind that we can finish the basement with no leaks or crumbling walls! Thankyou Gavin, Maggi, Ricardo and Jay!
Debra Gold
Debra Gold
We would like to express our gratitude to G.J. McRae for the exceptional job they did in restoring our peace of mind. Every time it rained or snowed, our basement would leak, causing us great distress. However, the crew from G.J. McRae arrived promptly, worked diligently, and efficiently resolved the issue. They even left our backyard in excellent condition, cleaning up after themselves. We cannot thank you enough for the outstanding service and for making us feel confident that the problem is now completely resolved. We are so happy to be able to not worry about this any longer.
Tricia LaDouceur
Tricia LaDouceur
Workers were on time and professional. Quality and value for money. My only issue was the concrete poured was a little uneven causing a small lip near the drain. We managed to smooth it out. Would highly recommend GJ MacRae Foundation Repair.
LOCAL repairs near you

What Does Quality Basement Waterproofing Repair Look Like?




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We’re honored to provide these resources to help you on your journey, and we know reputations are hard to build and easy to lose. That’s why our business is built around two simple promises:

Honesty and Transparency.

We genuinely want each step of your journey (from the very first Google search to a leak-free basement) to be positive!

Expert Waterproofing Services for Your Home

GJ MacRae has been the industry leader for reliable basement waterproofing in the Greater Toronto Area Since 1975. Nearly five decades of experience inform our proven multi-stage repair process based on below-grade drainage considerations that allow us to waterproof concrete blocks, poured walls, and stone rubble foundation walls properly for the long term. Our repair solutions for leaking foundation cracks include using bitumen-based barrier membranes and high-efficiency weeping tile systems, which give us the edge in reliability and allow for the most robust foundation repair warranty available today in the GTA. Experience the GJ MacRae difference for year-round basement leak repairs in Toronto, Oakville, Mississauga, Burlington, Hamilton, Milton, and Georgetown. If you spot cracked foundation walls, leaky foundations, or any other basement waterproofing issues in your house, reach out and call us today at (905) 824-2557.

Quality Basement Waterproofing Done Right.

Our Service Areas

At GJ MacRae, we take pride in extending our services across the GTA to meet our valued customers’ unique needs, and our dedicated team is committed to delivering top-notch solutions all year long. Our expansive service areas are a testament to our unwavering commitment to the highest quality foundation repair services and customer satisfaction in the GTA.

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Frequently Asked Questions

Below are some common Basement Waterproofing, Basement Crack Repair, Basement Foundation Repair and Basement Underpinning questions and answers!

Several factors can cause a wet basement, including damaged eavestroughs and downspouts, poor overall grade and drainage, foundation cracks, leaks in pipes, and improper sealing of the basement walls or floors.

Common signs of water problems in basements include:

  • Musty odors.
  • Mold growth.
  • Water stains on walls or floors.
  • Efflorescence (white powdery substance on the walls).
  • A hyperactive sump pump.
  • Visible cracks in the walls or floors.


We offer a comprehensive range of basement waterproofing services, including foundation repair, basement crack repair, sump pump installation, exterior waterproofing, interior waterproofing, structural foundation repair, basement underpinning, and many more.

The cost of basement waterproofing depends on several factors, such as the extent of the damage, the type of waterproofing solution needed, overall repair access, and the square footage of the repair area. We offer free consultations and can provide you with a quote once we assess your specific needs.

The timeline for a basement waterproofing project depends on the scope of the work. Some projects can be completed in a few days, while others may take several weeks. Rest assured, we will provide an accurate timeline during the consultation phase.

In most cases, you will not need to leave your home while the work is being done. Our team will take steps to minimize disruption and maintain a safe and clean work area.

Structural engineers are generally not required for Basement Waterproofing, Foundation Crack Repair, or Weeping Tile repairs.

The benefit of hand excavation for outside basement waterproofing is that the landscaping and grounds are undamaged during excavations.


Schedule a Free Consultation Today

Fill out our request form and we will contact you as soon as possible for a free foundation repair consultation!


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