Basement Waterproofing in Oakville
Family-run and based in Oakville since 1975. We fix leaking basements, foundation cracks and failed weeping tile for homeowners in Oakville and surrounding areas, with hand excavation that protects your yard and a written quote before any work starts.
Our Services Are Trusted By







Oakville basement waterproofing from a local, family-run company
GJ MacRae Foundation Repair is based in Oakville, at 470 Winston Churchill Blvd, and has been waterproofing basements and repairing foundations since 1975. We’re a second-generation family business, and Oakville is where we work most often. We also serve Toronto and the GTA, including Burlington, Mississauga, Milton, Georgetown and Hamilton.
Many Oakville basements leak during spring thaws and summer storms. Water collects against the foundation, then finds its way in through cracks, tie holes, the joint between the wall and the floor, or a weeping tile system that’s clogged or collapsed. Left alone, that means damp walls, musty smells, mould and damaged finishes.
We find where the water is actually coming from, then fix it with the right method for your house:
- Exterior basement waterproofing, hand-excavated to protect your landscaping
- Interior waterproofing with new weeping tile and a sump pump
- Foundation crack repair
- Weeping tile replacement, window well drains and drywells
Every job starts with an on-site assessment and a written quote. See our warranty for written warranty details.
Basement Waterproofing in Oakville
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 Oakville for below-grade concrete blocks, poured concrete, field stone, and rubble stone foundation walls.
With 10,000+ satisfied customers to date in Oakville and nearly 50 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 high-quality drainage solutions. GJ MacRae Foundation Repair is home to the highest quality basement waterproofing warranty. We guarantee to keep your structure in Oakville high and dry for years to come, and that’s a promise!
Choose the Best: Why We're Oakville'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 is GJ MacRae Your Ideal Choice For Basement Waterproofing in Oakville?
Over 10,000 Completed Projects
GJ MacRae Foundation Repair has waterproofed over 10,000+ basements since 1975! Our experience covers various eras of homes, from heritage to wartime bungalows to modern.
A Dry Basement, Guaranteed
With the GJ MacRae process, you can rest assured that your basement will remain dry. We use the best products and basement waterproofing process to make your basement walls water-resistant.
Nearly Five Decades of Experience
With nearly five decades of experience in basement waterproofing in Oakville and surrounding areas, GJ MacRae is prepared for any challenge with our adaptable and personalized plans that fit your foundation repair needs.
Hand Excavation Over Machine
GJ MacRae recommends the hand excavation process for basement waterproofing. This way, the landscape suffers much less damage and also allows tight-access excavations to take place.
Documented Waterproofing Quote
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.
Oakville Basement Waterproofing Reviews
We have earned thousands of positive feedback from our clients and are featured Oakville basement contractors on Homestars, Google Guaranteed, and HGTV. See for yourself what the GJ MacRae difference is all about!
A Word from Our Customers
Posted on Google![]()
A D
Going thru some old files for my rental property, I discovered a contract which Gavin had signed in Jan 2007 to repair a foundation leak in my basement. This leak had been 'fixed' multiple times by others using epoxy. Gavin explained that the only sure way to fix the leak once and for all, was to dig down to the foundation from the outside to seal the cracks, plus provide a waterproof barrier against the wall. The work was done excellently and came with a 15 year warranty. It has been 19 years and no leaks have occurred. If you want a basement leak fixed right the first time, then contact GJ MacRae Foundation Repair. Highly recommended.Posted on Google![]()
Bob Fuller
Dean and his team did a highly professional repair to our foundation. We needed expediency and Dean ensured we were taken care of.Posted on Google![]()
Diane Prest
Today Gavin MacRae did thorough inspection of 2 sump pumps & battery backups which he installed in 2018 - both systems still performing well. Prior to 2018 MacRae Foundation did extensive foundation/waterproofing for us - quality of workmanship excellent. Without hesitation, strongly recommend MacRae Foundation.Posted on Google![]()
Liza McIntyre
GJ MacRae provided us with interior and exterior waterproofing, as well as the installation of a sump pump. From start to finish , they were professional, courteous, on time and budget. Their customer service is exceptional and I’ve recommended their services to friends and neighbours without hesitation. L. McIntyrePosted on Google![]()
chad youden
I can’t say enough about GJ macrae. This company truly does go above and beyond for their clients. Extremely professional and clean work, done properly!! I will not hesitate to tell all my family and friends if they ever have a foundation leak or wet basement to call this company. Thank you again GJ macrae for helping me and my family!Posted on Google![]()
Gabhan Chalmers
We had a difficult project requiring excavation, waterproofing, and installing a sump pump on a 130 year old house, and GJ MacRae did an amazing and very thorough job. They went above and beyond to repair the foundation that had started to deteriorate as well. Very professional and high quality work. I'd definitely recommend this company!Posted on Google![]()
Rob Fratric
Great job. Fast response to inquiries, job done fast and professionally. Put everything around the area back in place to the point where you wouldn't even know any work was done afterwards. Would 100% recommend calling them if you have a foundation repair issue.Posted on Google![]()
LC
Let's just say that there aren't many companies of this calibre around these days. We've been dealing with GJ MacRae for the last seven years for everything sump pump related. Seven years ago the fine folks at GJ MacRae came in and replaced our existing sump with a modern unit complete with a marine battery backup and secondary pump. We have a ton of ground water around here and when it rains our sump fires non stop. Everything has been perfect and when it came time to service our system seven years in, GJ MacRae was all over it. Exceptional service, communication price and product. It's rare to see all 3 these days. Thanks for everything Gavin.Posted on Google![]()
Jeff S
Gavin of GJ MacRae and his team did an amazing, quick and clean installation of a sump pump in our basement! I was very impressed with every aspect, from communication, to timing, to the finished product! Absolutely would recommend them! Thanks Gavin!Posted on Google![]()
Dave Frei
When you are doing a large scale project like ours (basement dig, under pin, beam replacement and waterproofing), you need an expert team like GJ MacRae. They have the experience and the know-how to give you peace of mind that the job is being done right the first time. Gavin and his team showed up on time every day with a plan and executed it with precision! These guys are the best in the business!Verified by TrustindexTrustindex verified that these reviews were published on GJ MacRae Foundation Repair's Google Business Profile. Learn more
Industry-leading Waterproofing Services Oakville
GJ MacRae is the leading name for Basement Waterproofing in Oakville. We provide a wide range of basement waterproofing and foundation repair services. Our company started in 1975, and we have served over 10,000+ customers since. We have a team of highly skilled and experienced professionals, and we use the highest quality products to deliver lasting results.
Our services cover all aspects, from exterior and interior basement waterproofing solutions to underpinning, crack repair, and beyond. 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 Oakville 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.
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.
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 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.
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!
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.
Basement Waterproofing Oakville, Ontario
First, we isolate all foundation cracks in the basement foundation walls. We set up tarps and begin excavations to the footing of the basement foundation wall (typically 8ft deep).
Then, we use a wire brush to clean the exposed walls and chisel out the cracks. We apply hydraulic cement in the cracks using a trowel. After the cement is set, we move on to the next step in the repair.
We then apply a quick-drying primer to the concrete foundation walls. This primer is crucial to provide extra adhesion to the walls for the next steps in the waterproofing process.
A rubberized membrane is then applied to the entire repair area using a trowel. This rubberized membrane does not allow any liquid, air, or moisture. Then, we apply a layer of fiberglass mesh on top of the rubberized membrane. This fiberglass mesh provides flexibility to the membrane. Another layer of rubberized membrane is applied on top of the fiberglass mesh (this creates a double coat and gives extra protection).
A plastic layer is applied on top of the membrane while the patch is still sticky. This creates a quadruple layer of protection on the walls. Then, we install a drainage board on the top. This protects the membrane during backfilling and acts as an additional protection against water.
We then check the existing weeping tile system and ensure necessary repairs or replacements are carried out. A filter sock is installed to clean fine particles from groundwater to protect the weeping tile system.
The last step in this process is backfilling. We start by surrounding the weeping tile system with clear gravel on top and around the weeping tile drainage. This helps to get a clear flow for drainage. The native soil is then poured back into the trench. We power tamp the soil every 6″ -12″ inches, which helps keep the membranes locked in place and also helps to restore the original grading of the ground.
Finally, a termination strip is attached to the top of the drainage board to ensure that the strip does not separate from the board. Then, we clean up the worksite and removed all debris. The process is now complete.
What Does quality Foundation Repair Oakville Look Like?
RECENT PROJECT PHOTOS
RECENT PROJECT VIDEOS
Recent basement waterproofing and foundation work in Oakville
These are real Oakville jobs from our project files. Each one links to the full scope of work.
- Outside Basement Waterproofing with Drywell Install (Oakville): hand-dug to the footing, cracks repaired, rubberized membrane and drainage board, weeping tile replaced, and a new drywell for the downspout.
- Inside Basement Waterproofing with Sump Pump Install (Oakville): new interior perimeter weeping tile and drainage board, and a new sump basin and pump.
- Foundation Wall Rebuild with Outside Waterproofing (Oakville): damaged sections rebuilt and parged, with drainage board installed.
- Basement Waterproofing and Weeping Tile Replacement (Oakville): exterior membrane, and weeping tile replaced in clear gravel.
- Oversized Drywell Installation for Sump and Eavestrough Discharge (Oakville): new drywell with eavestroughs and hard pipe tied in.
- Hand Excavated Exterior Waterproofing, Window Well Installation and Deck Removal (Oakville): deck removed and reinstated, membrane, weeping tile repair, and a vertical drain in the window well.
What Oakville homeowners say
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.
Book a free basement assessment in Oakville
Tell us what you’re seeing (water on the floor, a damp wall, a crack or a musty smell) and we’ll come out, find the source and give you a written quote.
Fix Your Damp Basement With GJ MacRae Waterproofing Services
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 Oakville from the most experienced team in the GTA. Call us at (905) 824-2557
Frequently Asked Questions
It depends on the method (exterior or interior), the depth of the foundation, access and how much wall needs work. We give a free written quote after an on-site assessment.
Yes. We’re based at 470 Winston Churchill Blvd in Oakville and work across the town.
Yes. We’re based at 470 Winston Churchill Blvd in Oakville and work across the town.
Do you serve areas outside Oakville?
Yes. Oakville is our home base, and we also serve Toronto and the GTA, including Burlington, Mississauga, Milton, Georgetown and Hamilton.
Most jobs take from a few days to about a week, depending on the method and how much wall is involved.
Yes. We repair leaking foundation cracks, replace weeping tile, and install window well drains and liners across Oakville.
Expert Waterproofing Services for Your Home
GJ MacRae Foundation Repair has been the industry leader for reliable basement waterproofing in the Oakville, Ontario 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 Oakville wet basement 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 Toronto, 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 Oakville
We service the Oakville area including Burlington, Hamilton, Milton, Mississauga, Toronto, and more.