GJ MacRae Foundation Repair

The Original Wetbasements Experts – Since 1975

The Highest Rated Basement Waterproofing Services in Hamilton

Nearly 50 Years Of Experience And 10,000 Completed Projects in Hamilton and the GTA

Our Services Are Trusted By


The Go-To Basement Waterproofing Service in Hamilton

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GJ MacRae Foundation Repair is a renowned basement waterproofing company that offers a range of services, including foundation repair and underpinning. We provide complete basement waterproofing and have issued over 10,000 warranties to date, making us the most reliable waterproofing company in Hamilton, ON. As a family-owned business for over four decades, we take pride in our work and guarantee top-quality results. Beginning in 1975, no other companies in Hamilton have provided waterproofing and underpinning services for as long as we have. GJ MacRae is one of the few basement foundation crack repair companies in Hamilton that cover all phases of waterproofing, underpinning, weeping tile system, structure, and drainage-related solutions. We don’t just issue a document but genuinely provide the most reliable and time-tested waterproofing warranty available today in Hamilton.
Your Basement Water Problems Solved

Trust Our Expertise: Basement Waterproofing in Hamilton

We have proudly served The GTA, Hamilton, Toronto, Etobicoke, Mississauga, Oakville, Burlington, Milton, Georgetown, and surrounding areas since 1975. We specialize in basement waterproofing in Hamilton for below-grade concrete blocks, poured concrete, field stone, and rubble stone foundation walls.

We are the industry leaders in all phases of foundation repair, from crack repair to weeping tile systems, structural foundation repair and underpinning, all coupled with a full line of drainage solutions. We have served over 10,000+ satisfied customers in Hamilton to date and have nearly 50 years of experience.

GJ MacRae Foundation Repair is the home of the most valuable, time tested 15 year transferable warranty and we guarantee to keep your structure in Hamilton high and dry for years to come. 

Choose the Best: Why We're Hamilton's Best Waterproofing Company


Decades of Experience​

We’re experts with almost five decades of experience providing quality basement waterproofing services.


Service Since 1975

Servicing Toronto, Etobicoke, Mississauga, Oakville, Burlington, Milton, Hamilton and Georgetown since 1975!


Outstanding Service

We offer the highest quality foundation repair, basement waterproofing, and underpinning services.


Completely Family Owned

Family owned and operated since 1975, robust liability insurance, fully licensed, insured, and bonded.


Wide Range of Services

From waterproofing to sump pump installations, we have the solution to your foundation needs.


Highest Quality Repairs

We take immense pride in delivering the highest quality workmanship available today in the GTA!


Why GJ Macrae Foundation Repair is the Leading Basement Waterproofing Contractor in Hamilton?


The Highest Quality Basement Waterproofing Warranty in Hamilton

GJ MacRae Foundation Repair is the home of the original 15-year transferable warranty, and we will make sure your basement foundation remains leak-free for the long run! Plus, if your home is sold anytime within those 15 years, our warranty is transferrable to the new owners. Call us today for a quote and see what the GJ MacRae difference is all about!


Meticulous Hand Excavation

We provide a low-impact basement waterproofing excavation method that returns your grounds to their original state, and hand excavation means less overall damage to your property. Our hand excavation waterproofing process also protects the aesthetics of your home in a way that machine excavation cannot do. Interlocking stones, shrubbery, and garden beds can be reinstalled to their original state with minimal damage.


Hamilton Waterproofing Reviews

GJ MacRae Basement Waterproofing Hamilton reviews and testimonials are available on all the review sites. We have earned thousands of positive feedback from our clients and are featured contractors on Homestars, Google Guaranteed, and HGTV. See for yourself what the GJ MacRae difference is all about!


Over 10,000 Waterproofing Warranties Issued to Date

With over 10,000+ warranties issued to date, no other company can match our degree of waterproofing dependability. For nearly 50 years, we have been servicing Hamilton, Toronto, Etobicoke, Mississauga, Oakville, Burlington, Milton, and Georgetown, and we cover all phases of basement waterproofing, underpinning, structural foundation repair, and drainage. If you live in Hamilton, you can find a similar waterproofing job close to your home on our waterproofing projects page.


A Clear, Detailed Estimating Process

We assess your basement waterproofing issues clearly and determine the best route forward through a precise, organized written quotation. Our quoting and repair process is competitively priced and clearly outlined.


All Foundation Repair Solutions Under One Roof

We offer a wide range of various basement waterproofing solutions and approaches designed for your unique foundation issues. Whether exterior or interior waterproofing, foundation crack repair, or underpinning project, rest assured we have the right solutions under one roof. Call us today for more information.

A Word 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.

Industry-leading Waterproofing Services

GJ MacRae Foundation Repair is a leading name in the basement waterproofing and foundation repair industry and has been in the business for nearly 50 years! We have successfully served more than 10,000+ happy clients in Hamilton and have built a strong reputation in the process. Our experienced staff and high-quality repair process ensure we always deliver high-quality results.

We offer comprehensive basement waterproofing services for all types of homes, including interior and exterior basement waterproofing, underpinning, crack repair, and much more. Our skilled, expert workmanship produces guaranteed basement waterproofing solutions that last the test of time.


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.

The GJ MacRae Solution

Our Basement Waterproofing Process​


First, after establishing where the crack in the foundation is located, we set up tarps and begin excavating down to the footings by hand. It’s important to excavate beyond the cracking and all the way to the bottom of the foundation wall. Working our way across the below-grade exposed wall, we look for any additional surface cracks.


Next, the exposed wall is cleaned with a wire brush to prepare it for a coat of primer. The crack in the wall is then chiseled out and cleaned with a wire brush, allowing for the quick setting of expansive hydraulic cement inserted into the crack with a trowel.


Once the hydraulic cement is set, we apply a quick-drying primer to the foundation wall. This specialized primer allows for an aggressive adhesion to the wall, which sets us up for the next step in our waterproofing process.


Then, a rubberized membrane is applied to the entire wall using a trowel. Once applied, this rubberized membrane is impermeable to air, moisture, and liquid water. A layer of fiberglass mesh is applied on top of the rubberized membrane, allowing flexibility within the membrane while maintaining its integrity. Another layer of rubberized membrane is then applied overtop, creating a double coat. This allows us to ensure no water will penetrate the repaired areas.


Subsequently, while our patch is still tacky, a layer of thick plastic is now applied to the surface of the membrane. At this point, a product called drainage board is now installed on top of our quadruple-layered membrane. It acts as an additional layer, preventing water from reaching the foundation wall while protecting the membrane behind it during backfilling and power tamping.


Last but not least, the existing weeping tile is replaced within the repaired areas before backfilling. This fresh weeping tile is surrounded by a filter sock that cleans fine particles from groundwater, enabling the weeping tile to continue moving water away from your foundation.


Another step in protecting and preventing your overall foundation drainage system from becoming overwhelmed is installing clear gravel surrounding the new weeping tile system to ensure consistent, rapid drainage.


As the backfilling process begins, the native soil is power tamped every 6″-12″ (inches). Power tamping ensures that the drainage is consistent and that the rubberized membrane and waterproofing system are locked into place, allowing for the restoration of the original grade within the repaired areas with little to no settlement after the backfill is complete.


After the backfill and power tamping, a termination strip is attached to the top of the drainage board (rookies will put the termination strip on before they backfill!) This can cause a separation between the drainage board and the termination strip, causing unsightly issues later on. After completion, everything within the repaired area is washed and swept.

LOCAL repairs near you

What Does quality Foundation Repair Look Like?



A High and Dry Basement Thanks to the GJ MacRae Basement Waterproofing Repair Method

Your basement has so much potential. Don’t let it go to waste because of leaks, cracks, or dampness. Transform your wet and musty basement into a dry, cozy space you can love. Whether you fancy a game room, a gym, or a hangout spot, you can transform your leaking basement into your dream space!

Call GJ MacRae Foundation Repair today; you’re only one call away from a dry basement! We’ll check out your basement situation and give you the ideal waterproofing solution. Get the best basement waterproofing in Hamilton from the most experienced team in the GTA. Call us at (905) 824-2557


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.


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!

Frequently Asked Questions

Basement Waterproofing is a method that prevents water from penetrating through the concrete foundation walls of your house. Basement Waterproofing is vital because it helps to keep your basement dry.

There is no one-size-fits-all approach, and the solution to a waterproofed basement generally requires a design specifically tailored to your issues directly. Call us today for a quote; we would be happy to develop a repair plan for you!

Short answer: Yes. But you must work with a professional basement waterproofing repair company to produce a solution that delivers a long-term result.

This process generally has two steps: Repairing the crack with hydraulic cement is typically the first step. Then, that patch is properly waterproofed with a rubberized membrane afterward. These are two separate issues and need to be addressed with different solutions.

Efflorescence – a calcium mineral deposit left behind after water or moisture was present on concrete.

GJ MacRae provides solutions with long-term warranties. Considerations include the type of waterproofing system and the sump system you install. Different options offer different levels of protection.

Some of the most common sources of basement water damage include leaky basement walls, clogged or damaged weeping tile systems, foundation wall cracks, leaky window wells, and faulty or damaged basement sump pumps.

Recurring leaks in your basement walls, floors, or ceiling are a hassle to clean up and create a damp environment that serves as a breeding ground for mold and wood rot. Mold growth can seriously damage your basement walls, possessions, and indoor air quality, so keeping your basement dry is crucial.

Hydraulic cement is an expansive-masonry-based product used to patch cracks in concrete walls and stop water and leaks in concrete and masonry structures. It is a type of cement, similar to mortar, that sets extremely fast and hardens after it has been mixed with water. It is used widely in the construction industry, sealing structures below grade and where structures can be affected or submerged in water.

At GJ MacRae, we pride ourselves on providing permanent solutions and stand behind our work with an industry-leading fully transferable warranty. Most of our foundation repair, basement waterproofing, and crawl space repair work is backed by a 15-year transferable warranty.

Expert Waterproofing Services for Your Home

GJ MacRae Foundation Repair 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 foundation walls, leaky foundations, or any other basement waterproofing issues in your house, reach out and call us today at (905) 824-2557.

Quality Foundation Repair Done Right.

Service Areas in Hamilton

We service the Hamilton region including Ancaster, Stoney Creek, Dundas, Albion Falls, and more.