Best Basement waterproofing services in Mississauga

Delivering dry and leak-proof basements with our quality basement waterproofing services in Mississauga since 1975

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Delivering dry and leak-proof basements with our quality basement waterproofing services in Mississauga since 1975



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The Leaky Basement Problem in Mississauga

The city of Mississauga receives its fair share of rain throughout the year, and most basements are not ready for it. Many homes in Mississauga have very poor and/or no basement waterproofing systems installed on their foundation walls. And this can turn into a nightmare during heavy rainfall. Due to rain or thaw, water puddles begin to form around your house, and can be soaked into the soil. Since there is no barrier, the water in the ground begins to seep through concrete basement walls and cause water damage. In most cases, basement walls are damaged due to water seepage and this can start growing mold and mildew, which can become a severe health hazard.

On top of that, hydrostatic pressure from the soil starts to make cracks in your basement walls, weakening your home’s foundation. Your wet basement turns into a musty-smelling, mold-infested, flooded room that can quickly turn into a liability. All this can be avoided by waterproofing your basement, and GJ MacRae, the best Mississauga basement waterproofing company, is always at your service.

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GJ MacRae Foundation Repair:
Your Basement Waterproofing Solution in Mississauga

When it comes to basement waterproofing in Mississauga, GJ MacRae is the name that comes to everyone’s mind. And that is no coincidence. We have been providing basement waterproofing in Mississauga for over 48 years and have served 10,000+ customers to date. We are a family-owned business, and we highly value our customer’s satisfaction and devote ourselves to providing quality work. We do the right job at the very first time.

We have dealt with numerous difficult basements over the years and our highly skilled staff has the solution. When our highly experienced staff combine with top-of-the-line equipment, the result is QUALITY. Our work is backed up by a transferable 15-year warranty, making us one of the most trusted Mississauga basement waterproofing companies.

The GJ MacRae Solution: Basement Waterproofing Mississauga

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

With 10,000+ satisfied customers to date in Mississauga and over 40 years of experience, we are the 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, etc.

GJ MacRae Foundation Repair is the home of the true, time-tested 15-year transferable warranty. We guarantee to keep your structure here in Mississauga high and dry for years to come. We also issue a true guarantee from Home and Garden Television (HGTV) featured contractor and The Homestars: Best of Award for Customer Service.



Decades of Experience

Trust the experts with almost five decades of experience in providing basement waterproofing services. 

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Serving the GTA

We have been Servicing Toronto, Etobicoke, Mississauga, Oakville, Burlington, Milton, Hamilton and Georgetown.

best service award for water proofing in ontario

Outstanding Service

Home of the original transferable warranty. Licensed specialists in basement waterproofing and underpinning.

family owned water proofing company

Completely Family Owned

Family owned and operated since 1975. Robust liability insurance, WHMIS trained, fully licensed, insured and bonded.

wide range of services

Wide Range of Service

From foundation repair to sump pump installation, we have a solution for all your basement waterproofing needs.


Quality Workmanship

We take pride in delivering the highest quality workmanship, ensuring your basement stays dry for a lifetime

Why is GJ MacRae Your Ideal Choice For Basement Waterproofing In Mississauga?

Successfully Completed Over 10,000+ Basement Waterproofing Projects

Since its establishment, GJ MacRae Foundation Repair has completed more than 10,000+ basement waterproofing projects. The number speaks for itself. To be trusted by such a number of customers is a testament to our quality service and workmanship.

Guaranteed Dry Basements

When we do a job, it's always a job well done. We can guarantee a permanently dry basement. Get rid of leaky basements after the special GJ MacRae treatment. Tailored basement waterproofing solutions that fit your basement needs to create a lasting dry impact.

Five Decades of Experience

GJ MacRae has almost 50 years of experience in basement waterproofing in Mississauga and surrounding areas. With such vast experience, we are ready for any kind of basement waterproofing project with our custom-tailored basement waterproofing plans that suit your basement needs.

Hand Excavation Rather Than Machine

We prefer using hand excavation rather than a machine when possible to significantly reduce the damage to your property. We practice residential low-impact hand excavation to protect your property's aesthetic and effortlessly revert the ground to its original state.

Documented Waterproofing Quote

Our team properly analyses your basement situation, understanding the severity and providing you with a written quote for your basement waterproofing. We stay competitive with our pricing and are always transparent with our charges. A written quotation is provided before we begin the waterproofing.

Mississauga Basement Waterproofing Reviews

With over 10,000+ projects completed to date, we have received numerous excellent reviews and client testimonials in leading review sites like Homestars, Google and and HGTV. Don't just take our word for it; see what our customers have to say about us.


Joseph PastorJoseph Pastor
16:15 24 Jan 23
Excellent service from beginning to end. We would highly recommend this company. Dean assessed the problem (water leaking into our furnace room as a result of a window well that another company had incorrectly installed previously) and provided a thorough estimate detailing every aspect of the project. He then scheduled the job to be done before the big winter storm that had been forecast. The crew arrived exactly on time and completed the job, to the very best professional standard, in less than a day. We are so glad we chose G.J. MacRae. Thank you very much.
Lisa NeedhamLisa Needham
19:43 11 Nov 22
Amazing Service! GJ MacRae Foundation repair provided timely and superior quality service. Everything went exactly as planned from our initial consult and quote. Workers were on time, the quote was accurate and the work was high quality. We have a perfectionist contractor and he was incredibly impressed with Gavin and the team and he noted that the work was exceptional Inside and out on the project. The site was was clean and looked perfect when completed. Would highly recommend this service to our friends and family and others looking for this type of work! We can’t say enough good things and are so thankful!
16:24 11 Nov 22
Our second time utilising GJ MacRae Foundation; separate issues. Their professionalism and respect for their clients is highly commendable. Office team, sales and on-site crew all compliment each other.Highly recommend GJ MacRae Foundation company!
Kate PapadopoulosKate Papadopoulos
23:28 10 Apr 22
My fiancé and I can not say enough amazing things about GJ Mcrae. As first time home owners with water damage in our basement, GJ mcrae took care of everything so quickly and we’re extremely professional, reducing any worries we had. Would recommend this company over and over again. Dean was so easy with work with and continued to support us throughout the process. Thanks so much for the amazing job.
Adam DAdam D
19:38 11 Oct 20
We had GJ Macrae underpin our 1890s house in Leslieville over the summer. The team showed up on time every day, the project moved so smoothly. I wish I had another basement for them to underpin.Highly recommend GJ Macrae for any basement or underpinning work. The final result looks fantastic, we have a beautiful basement, with nice tall ceilings!The whole team was a pleasure to work with! 5 stars!

Industry-leading GJ MacRae Waterproofing Services

GJ MacRae Foundation Repair is a standout name in the basement waterproofing and foundation repair industry. We’ve been in business for nearly 50 years, and we’ve successfully serviced more than 10,000+ happy clients in Mississauga and established a strong reputation. Thanks to our experienced staff and our use of excellent quality products, we have delivered results of the highest quality.

For all sorts of houses, old or new, we provide a complete variety of basement waterproofing services, including interior and exterior basement waterproofing, underpinning, crack repair, and much more. Our qualified specialists carry out our customized basement waterproofing solutions that stand the test of time.


Basement Waterproofing Mississauga

We specialize in basement waterproofing services for below-grade concrete blocks, poured concrete, field stone, and rubble stone foundation walls. With over 40 years of service in the GTA and backed by the most reliable warranty in the business, see what the GJ MacRae difference is all about.


Foundation Crack Repair Mississauga

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 repair methods simply not work? Trust the experts and see why GJ MacRae Foundation Repair carries the business's most reliable crack repair warranty.


Weeping Tile Systems Mississauga

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 benefit of our expertise!


Sump Pumps Mississauga

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, sump basin, and battery backup system are well maintained and ready for the next significant rain or thaw.


Structural Wall Repairs Mississauga

Is your home's structure moving, and is this movement accelerating as the years pass? The sooner the integrity of your foundation is restored, the better. We have a full line of time-tested, certified structural foundation repair solutions tailored to your scope and budget.

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Crumbling Foundations Mississauga

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.


Basement Underpinning Mississauga

GJ MacRae are pioneers of 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, all for less than a standard second-story addition.


Structural Carbon Fiber Mississauga

When your foundation walls begin to show signs of cracking or bowing, it generally indicates severe exterior lateral pressure from tree roots, hydrostatics, or poorly draining soil. Click here to learn more about our full carbon fiber foundation reinforcement application line.

Window Wells

Window Wells Mississauga

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

The GJ MacRae Solution: Basement Waterproofing Mississauga

The very first step is to establish the location of the cracks in the foundation walls. We set up tarps and dig all the way down to the footings to not miss any of the cracks.

Next, we clean the exposed walls with a wire brush. We then chisel out the cracks, put hydraulic cement in the cracks using a trowel, and let the cement set.

After the hydraulic cement is set, we apply a quick-drying primer to the foundation walls. The primer helps provide aggressive adhesion to the walls, which is needed in subsequent steps in the waterproofing process.

A special Hydroshield rubberized membrane is applied to the entire wall using a trowel. This rubberized membrane is impermeable to air, moisture, and liquid water. A layer of fiberglass mesh is also applied to provide flexibility to the membrane while keeping its integrity. Another layer of Hydroshield is then applied again, creating a double coat and extra protection. This will guarantee that no water can pass through.

We apply a layer of thick plastic in the membranes while the patch is still sticky. After that, we install a Platon drainage board on top of the quadruple-layered membrane. It acts as an additional layer preventing water from getting to the foundation wall while protecting the membrane behind it during the backfilling.

The existing weeping tile drainage is replaced. A new weeping tile system is installed and is surrounded by a filter sock that helps to clean fine particles from groundwater and eases the drainage process.

Now we start the backfilling process. We first like to fill the top and around the weeping tile system with clear gravel to ensure consistent and rapid drainage. After that, the native soil is installed back into the excavation. Power tamping the soil every 6" -12" inches ensures that the drainage is consistent and that the rubberized membrane and waterproofing system are locked into place, restoring the original grade within the repaired areas.

A termination strip is attached to the top of the Platon drainage board to ensure that the strip does not separate from the board. After completion, everything within the repaired area is washed and swept.

Get Rid Of That Leaky Basement Today
Your Basement Waterproofing Solution in Mississauga

Give that much-needed transformation to your basement today. Transform your wet, leaky basement into a dry basement that is useful. Utilize your basement space to its full potential. Make your basement into your game room, gym, or hangout space because a leaky basement is of no use!

You’re just one call away from a dry basement. Pick up the phone and call GJ MacRae, and we will be at your doorstep as soon as possible. Give us a call or fill out the form below and our team will inspect your basement situation and provide the ideal basement waterproofing solution. Basement Waterproofing in Mississauga from the best basement waterproofing company in the city. Contact us at (905) 824-2557 or fill out the form below.


Schedule A Visit With Us Now!

After you fill out the form below, we will contact you as soon as possible for A FREE ESTIMATE. If you still have any questions, feel free to contact us anytime. We are 24/7 active!

Frequently Asked Questions

Waterproofing is a method that prevents water from penetrating your house. Waterproofing is very important as it helps keep your house dry.
There is no one size fits all approach. The solution to waterproof your basement needs to be designed specifically to address your issues and accomplish your goals. But we guarantee the most reasonable price to fit all customers’ satisfaction.
Yes. Again it is important to work with a professional so that you get a solution with a long-term warranty and a company that gives you the peace of mind that they will do the work right and stand behind it.
No. These are two separate issues and need to be addressed with different solutions.
Efflorescence- it is a mineral deposit left behind after water or moisture was present
GJ Macrae provides solutions with long-term warranties. Considerations include the type of waterproofing system you install and the type of sump system you install. There are different options that offer different levels of protection.
Some of the most common sources of basement water damage include leaky basement walls, basement drains, foundation wall cracks, leaky egress windows, 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, your possessions, and even your indoor air quality
Hydraulic Cement is a product used to 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 in situations 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 industry-leading fully transferable warranties and guarantees. Most of our foundation repair, basement waterproofing, and crawl space repair work is backed by a 15-year warranty.

Service Areas in Mississauga

At the moment, we are serving our waterproofing services/projects throughout the Mississauga region including Ancaster, Stoney Creek, Dundas, Albion Falls, and more. So don’t hesitate, give us a call and see how it goes!