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Basement Waterproofing Toronto, GTA & Southern Ontario

Not your Average Waterproofers, Toronto's Best

Welcome to Aquamaster – one of the leading basement waterproofing companies in Toronto, GTA & Southern Ontario. Since 2009 we’ve been perfecting our process & service offering. Today we are happy to offer a full spectrum of basement leak repairs, plumbing & waterproofing services, including:

  • Basement Waterproofing

  • Basement Leak Detection & Leak Repair

  • Foundation Repairs

  • Basement Underpinning

  • Sump Pump Installation & Service

  • Weeping Tile Installation

  • Window Well Installation

  • Many other Waterproofing, Plumbing & Drain Cleaning services

Get one of our basement waterproofing contractors on the phone today & start with 10% OFF!

Built to Last for Decades

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Team at Aquamaster Basement Waterproofing Toronto in front of the office in Toronto

Who can Benefit from Basement Waterproofing?

Signs that you Need Basement Waterproofing Services

Basement waterproofing includes a number of services, designed to prevent wet basement problems & repair basement leaks. Depending on the specific source of the leak basement waterproofing services can include anything from simple wall crack repairs, and window well installations to complex services like exterior & interior waterproofing,  basement floor lowering (underpinning), sump pump installations, weeping tile installations, and more.


Specific services for your waterproofing project will vary depending on the source of the leak, the extent of the damage & other factors specific to your scenario. Here is a couple of signs that you need basement waterproofing:


  • Water Coming Up from the Basement Floor – a common problem to have. There is a number of potential causes of this problem, with groundwater being one of the common ones.

  • Wet Basement Walls or Floor – if walls or floors in your basement feel damp when you touch them, there must be something causing this. In scenarios like this, our basement waterproofing contractors often start with leak detection services. Once the source of the leak is identified we repair the cause of the leak.

  • High Humidity – one of the signs of basement leaks is high humidity. Moisture makes it through the foundation and humidity in your basement increases.

  • Musty Odor – may be a sign that your basement has mold or fungi in your basement. Mold & fungi prefer high-humidity environments and wet basement problems may lead to mold growth over time. If you hear a musty smell in your basement, you should consult an expert.

  • Wet Wall Stains – water can make it through the basement wall cracks, through a leaking window well, or through another source. If it does, you will likely see basement wall leaks. This is a sign that you should talk to basement waterproofing contractors.

  • Basement Leak Prevention – ideally, basement waterproofing should be used to prevent basement leaks before they happen.


If you are looking to protect your basement & your property from potential water damage, Aquamaster is here to help. Get one of our experts on the phone today & start with 10% OFF!

What you Get With Basement Waterproofing?

What are the Benefits of Basement Waterproofing in Toronto?

When it comes to basement waterproofing in Toronto, it is definitely worth the investment. Protecting your property from potential water damage or repairing new basement leaks brings comes with a number of benefits, here is a couple of examples:


  • Prevents Water Damage – exterior waterproofing and some other waterproofing services are designed to prevent water from entering your basement or to help manage the water that has already made it through. This can help prevent basement leaks & basement floods.

  • Protects Construction Materials – if leaks are less likely to happen in your basement, this means that construction materials used in walls & floors will last longer.

  • Helps Prevent Structural Damage – when you minimize the interaction of your basement and groundwater, you extend foundation life. This means that your foundation will last longer.

  • Protects Your Investment – properties are a big investment to make. Basement water damage can negatively impact the value of your property and result in a costly repair. Protecting your property from water damage means protecting your investment.

  • Increases the Value of Your Property – basement waterproofing helps protect your investment, but can also help you grow it. Properties with waterproof basements are more attractive to potential buyers. When you waterproof your basement, the value of your property may increase.


The list goes on. Get one of our experts on the phone today to schedule a free on-site esmate. Our teams are trained to design the right basement waterproofing solutions that will work for your objectives & budget. Call Aquamaster today!

Aquamaster Basement Waterproofing Toronto team working on exterior basement waterproofing project in downtown Toronto

Basement Waterproofing can Include Some of the Following Services

What is Included in Basement Waterproofing Toronto?

Basement Waterproofing Services Infographics

When designing a basement waterproofing Toronto projects, our team will consider a number of factors – the location of the property, how much ground water is in your area, the extent of water damage, your plans for the property, your budget, and more. Depending on these factors our basement waterproofing contractors will pick some of the services below and include them in your basement waterproofing project:

External waterproofing is a method of preventing water from entering a building's foundation or basement walls by creating a waterproof barrier on the outside of the structure. This barrier is designed to prevent water from penetrating the walls or foundation and entering the building, which can lead to water damage, mold, and other issues.

External waterproofing typically involves excavating the area around the foundation, repairing wall cracks, french drain installation, backfilling the trench and landscaping.

Exterior Waterproofing Cost
Toronto - $100-$300/linear foot

Basement Underpinning (Floor Lowering)

Basement underpinning is a construction method that involves strengthening the foundation of a building by increasing the depth or width of the foundation. This is typically done by excavating underneath the existing foundation and installing additional supports, such as concrete or steel beams, to increase the load-bearing capacity of the foundation.

Underpinning is often used to stabilize foundations that have been weakened by soil movement, settling, or other factors. It can also be used to increase the height or depth of a basement, allowing for additional living space or storage.

Window well installation refers to the process of creating a secure and functional enclosure around basement windows or below-grade windows that are partially or fully below ground level. Window wells serve multiple purposes, including providing natural light, ventilation, emergency exits, and access for maintenance and escape.

Window Well Installation Cost Toronto - $1,600-$4,000

Basement Leak Detection & Basement Leak Repair

If you are experiencing wet basement problems or see foundation leaks on your walls, this could be a sign that you need a foundation leak repair. The first step is often foundation leak detection. Our teams are trained to deliver quality foundation leak detection & repair services and have all the necessary equipment with them. Let us find the leak in your basement & do the foundation crack repair to address it!

Internal waterproofing is a method of preventing water from entering a building's basement or foundation walls by installing a waterproof barrier on the inside of the structure. This barrier is designed to prevent water from penetrating the walls or foundation and entering the building. It is important to note that internal basement waterproofing doesn't prevent water from entering the foundation walls, but helps manage the water that has already made it through. 

Interior Waterproofing Cost
Toronto - $70-$350/linear foot

Cracked basement wall, and cracked basement floor will almost 100% lead to water leaks or even worse. After the basement cracks are detected, we will go for foundation crack repair. Foundation cracks will be injected with an epoxy resin solution that bonds the pieces of the concrete foundation together.

Foundation Crack Repair Cost
Toronto - $1,500-$3,200

Flood Cleanup Services

The main goal of flood cleanup services is to minimize damage and prevent the growth of mold and bacteria by quickly removing standing water, drying out affected areas, and cleaning and disinfecting surfaces.

Some of the services that may be included in a flood cleanup package include water extraction, dehumidification, carpet cleaning, upholstery cleaning, structural drying, mold remediation, and odor removal. 

A weeping tile, also known as a drain tile or french drain, is a porous pipe that is used to manage groundwater around a building's foundation. The pipe is typically made of plastic or clay, and is installed around the foundation.

The purpose of a weeping tile is to collect groundwater and divert it away from the foundation to prevent water damage and flooding.

A sump pump is a mechanical device that is used to remove excess water from the basement or crawl space of a building. It is typically installed in a sump pit, which is a hole dug into the basement floor or crawl space. The sump pump is designed to automatically activate when the water level in the sump pit reaches a certain point, and then pumps the water out of the pit and away from the building. A sump pump is a common element of internal basement waterproofing systems.

Sump Pump Installation Cost
Toronto - $500-$3,600

Damaged water lines, broken hot water tanks, water overflows, sewage overflows, and many other things can lead to basement floods. A certified team of Aquamaster Plumbers & basement waterproofing experts will deliver basement flood restoration services, basement dry out & disinfect the basement after flooding. If you need basement flood repair, don't wait call right now!

Basement plumbing rough-ins & basement bathroom rough-ins are some of the most popular services along with new construction waterproofing. They involve our team of Aquamaster waterproofing contractors installing pipes and vents for the plumbing system in new construction projects. This service involves routing pipes through wall cavities, running vent stacks to the roof, laying underground pipes, and installing fixtures and end elements etc.

Walkout basement construction is an excellent way to add functionality to your basement and allow better ventilation, sun, and more. Walkout basements are a popular investment for property owners who are looking to increase the value of their property or make their basement into a more functional space or even convert it into a rental with a separate entrance. 

What Type of Basement Waterproofing is Right for you?

Should you Choose External or Internal Basement Waterproofing in Toronto?

External waterproofing and internal waterproofing are two methods of preventing water from entering a building structure, but they differ in terms of their location and application.

External waterproofing involves applying a waterproof barrier on the outside of a building's foundation or walls, typically during the construction phase. This can involve excavating around the building to expose the foundation walls, applying a waterproof membrane or coating, and then backfilling the excavated area. External waterproofing is often considered the more effective method, as it prevents water from entering the structure in the first place.

Internal waterproofing, on the other hand, involves installing a waterproofing system inside the building, usually in the basement or lower levels. This can include the installation of a sump pump, a French drain, or a waterproof membrane on the inside of the walls. While internal waterproofing can be effective in managing water that has already entered the structure, it does not prevent water from entering the structure in the first place, which can lead to moisture buildup and potential mold or mildew growth.

Overall, external waterproofing is generally considered to be the more effective and comprehensive solution for preventing water damage to a building, but it can also be more expensive and disruptive to install. Internal waterproofing is often used as a secondary measure or as a temporary solution until external waterproofing can be completed.

Why Choose Us?

3,000+ Happy Clients Chose Aquamaster


True Warranty Coverage

Work, material and labour for 25 years. Fully transferable from owner to owner.

24-Hour Emergency

Our emergency team is available 24 hours a day.


Licensed & Insured

Aquamaster team is fully licensed & insured to work in plumbing, concrete, underpinning and waterproofing.



We offer all our clients 10% Off their first Aquamaster service. Get the offer today!

In Business Since 2009


We've been around for a while. We will be around for a lot longer!

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Proudly Serving South Ontario

Aquamaster team is proudly serving multiple locations in Toronto, GTA and multiple locations in Sothern Ontario.


Best Materials

We always choose high quality materials because we want to provide high quality service. 


Peace of Mind

Our service is well-thought through, so you don't have to worry about it!

Don't Take Our Word for It!

What Our Clients Say?


Stephanie G.

Residential Client

I used Aquamaster for two separate home waterproofing projects and I was extremely satasified with their work and price. Their team are highly skilled, thorough and were able to complete the 10.5 hour job in one day. They were even kind enough to seal my window frame after I noticed a minor leak. I would highly recommend Aquamaster for all your waterproofing and plumbing needs.

The Aquamaster team is absolutely fantastic! They went above and beyond to diagnose and correct the problem that I had with my basement plumbing caused by old pipes and persistent tree roots. I used them once in 2012 and in 2020. I cannot say enough good things about this team - highly recommend.


Felicia F.

Residential Client


Chris D.

Residential Client

Aqua Master quoted me a very fair price for waterproofing and finshed the job ahead of schedule. We haven't had any water issues in our post-war hm since then. Highly recommend this business for its professionalism and quality of work. Hire with confidence!

How it Works?


Discovery Call

Connect with one of our certified experts, so we can advise on the best way to approach your project.


On-Site Survey

More complex projects require on-site surveys, where a certified Technician will provide a no-obligation estimate.



We sign a contract that outlines details of your project.



We do the work, you get peace of mind and a 25-year transferable warranty.

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What are your Service Areas?

Proudly Serving Southern Ontario and Beyond


King City








And Southern Ontario...

Get Started with 10% Off Today!

Unparalleled quality service, 25 years warranty, all available today with 10% off.

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