Exterior Basement Waterproofing Toronto & GTA
Are you looking for effective exterior waterproofing solutions? GJ MacRae has you covered. Shield your home from water intrusion with our reliable repair services.
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Exterior Basement Waterproofing Services in Toronto
Exterior basement waterproofing protects your home by stopping water before it reaches your foundation walls. This method involves working on the outside of your home to seal the foundation, improve drainage, and prevent cracks from allowing water inside. Homeowners typically choose exterior waterproofing when they want long-term protection, especially in older Toronto homes that lack proper drainage systems.
With nearly 50 years of experience, GJ MacRae provides exterior waterproofing solutions designed to keep basements dry, stable, and free from long-term moisture concerns. Our team focuses on reliable methods, durable materials, and practical guidance for homeowners across the GTA.
The Exterior Basement Wall Leakage Problem
Water entry from the outside is one of the most common issues Toronto homeowners face. Many older properties lack proper waterproofing or have drainage systems that have failed over time. When rainwater and groundwater build up around your home, moisture is pushed against your foundation walls. Over time, this leads to:
- Cracks in concrete or block walls
- Damp or musty basement smells
- Mould and mildew growth
- Peeling paint or efflorescence
- Foundation deterioration from hydrostatic pressure
If left unchecked, this pressure can widen cracks, weaken the structure, and create ongoing seepage issues. Exterior waterproofing directly addresses the root cause by keeping water away from the foundation rather than managing it after it enters.
Benefits of Exterior Basement Waterproofing
Now that you know how important it is to waterproof your basement, let’s discuss the significant benefits of waterproofing basement walls from the outside or exterior.

No More Basement Flooding
One of the most significant benefits of proper exterior basement waterproofing is that your basement doesn’t flood when it rains outside. Trust us; you do not want your basement to be attacked because it is challenging to get that water out of your basement once it’s already there! With proper, high-quality basement waterproofing, you do not have to worry about all this because excess water cannot enter your basement and stays dry. Also, many people lose valuable items to basement flooding, which is not a problem with a dry basement.
Say Bye to Mould and Mildew
Mould and mildew thrive in damp basements. It looks awful and is a severe health concern; a wet basement invites this bacteria growth. But with exterior basement waterproofing, your walls are dry, and it is very difficult for mould or mildew to grow in such situations. Also, you eliminate that unpleasant, musty smell caused by a damp basement.

More Space
There isn’t much one can do in a wet basement. You can’t store anything or renovate. So, it’s practically inhabitable and nearly useless if wet. But a dry basement has many options! You can use it as a store room, game room, or even to set up a bedroom or apartment. Suddenly, extra space is available in your house just because you decided to waterproof your basement.
Improved Structural Integrity
Continuously being wet and dry can take its toll on your concrete foundation or basement walls, and the hydrostatic pressure from the outside doesn't help either. Years of this can destroy your foundation walls and may cause serious problems. But a dry and waterproofed basement eliminates the risk of leaks in your basement walls. Therefore, dry basement walls suggest that your basement foundation and structure are strong and that the structural integrity of your basement is maintained.
Higher Property Value
As a property buyer, you will always look for a house with extra space and a dry basement. Therefore, investing in waterproofing your basement has a much larger return on investment and can secure you good value when selling your house.
Our Exterior Basement Waterproofing Process
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The first step in the exterior basement waterproofing process is to excavate around the entire perimeter of your house. Additionally, we can use hand excavation to ensure minimal damage to the foundation.
02
Next, we cleaned the entire basement walls with a wire brush and prepared them to be coated with primer. We then use hydraulic cement to seal the cracks. A quick-drying primer is applied, which provides extra adhesion to the wall.
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After the cracks are sealed and dried, we apply a rubberized membrane to the entire foundation wall. These rubber membranes are airtight and waterproof, meaning air or water cannot pass through them. Sometimes, we apply another layer of a rubberized membrane for extra protection.
04
After the patch is set, we install a drainage system in the form of weeping tile. This step is crucial as it redirects excess water and hydrostatic pressure away from the foundation walls. We then cover the drainage system with clear gravel for long-lasting results.
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After the installation of the drainage system, the backfilling process starts. We like to power-tamp the soil every 6-10 inches. This helps us to really lock the membrane in place and also to restore the original grading.
Why Choose GJ MacRae?
- Highest Rated Customer Service: Customer satisfaction is our primary goal. We will work with you closely to understand your needs and provide the best solution to your foundation repair project.
- Comprehensive Services: With GJ MacRae, homeowners can find all foundation repair solutions under one roof. From foundation crack repair to exterior waterproofing and weeping tile installations, we have the expertise and resources to address your complete waterproofing needs from start to finish.
- Extensive Experience: With nearly 50 years of experience in the industry, GJ MacRae is known for delivering quality, long-term basement waterproofing solutions while tackling even the most challenging waterproofing projects with confidence and expertise.
Protect Your Foundation
- Competitive Pricing: GJ MacRae offers competitive basement waterproofing services without compromising quality. We provide transparent, fair quotes that ensure homeowners receive the best long-term value.
- Quality Materials: GJ MacRae uses high-quality repair materials combined with the latest waterproofing techniques, and we are experts in all phases of basement waterproofing. Plus, we offer innovative solutions that guarantee long-lasting protection against water infiltration.
- Protect Your Investment: When protecting your foundation walls and basement from water damage, choosing GJ MacRae Foundation Repair for basement waterproofing in Toronto ensures you receive the highest quality repair solution to safeguard your foundation long-term.
A Word from Our Customers
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Need Exterior Basement Waterproofing in Toronto? Give Us a Call!
A seasoned homeowner knows the importance of basement waterproofing, and we are just the right team to get your basement waterproofed. We have been serving the GTA for over 48 years and can provide the best solution for your basement.
If you are someone who has a leaky basement, give us a call. Schedule an appointment, and our team will arrive to inspect your situation and provide you with a solution. We also service Oakville, Mississauga, Burlington, Hamilton, Milton, Georgetown, and Toronto. We provide basement waterproofing services all year round. If you notice any signs of seepage or water leaking, call (905) 824-2557. Or, you can fill out the form below, and we will contact you as soon as possible.
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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Fill out our request form and we will contact you as soon as possible for a free foundation repair consultation!
Frequently Asked Questions
Waterproofing the basement from the outside ensures that water cannot enter the basement walls and cannot damage the concrete foundation. Waterproofing basement walls from the outside ensures that your concrete walls are dry and mould-free.
Most leakage problems arise from the outside, but waterproofing your basement from both outside and inside keeps your basement secure permanently from rain and water seepage.
A drainage system like weeping tile ensures that the excess rainwater inside the soil is adequately collected and redirected away from the foundation walls. A rubberized membrane blocks water from entering your foundation wall but doesn’t offer much when moving water away; hence, weeping tile drainage comes into play.
You do not need to move out of the home during a basement waterproofing repair process. The complete project is carried out outside your home, and you can live peacefully inside while the work is done outside. No heavy machinery is involved as we like to use hand excavating to dig up your foundation wall from the outside.
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 cracked foundation walls, leaky foundations, or any other basement waterproofing issues in your house, reach out and call us today at (905) 824-2557.



