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Basement Waterproofing Markham

Not your Average Waterproofers, Toronto's Best

Welcome to Aquamaster, your trusted source of basement waterproofing Markham. Since 2009 we’ve been helping keep commercial and residential properties safe from water damage. We are so certain of our quality, we guarantee it – our basement waterproofing services come with a 25-year transferable warranty.


Get 10% off some of our most popular services:

  • Basement Waterproofing

  • Sump Pump Installation

  • Basement Underpinning

  • Foundation Crack Repair

  • Basement Leak Repair

  • Trenchless Pipe Replacement and more.

Built to Last for Decades

Team of Basement Waterproofing Contractors at Aquamaster Markham

What Basement Waterproofing can Help with?

What is Basement Waterproofing?

Basement waterproofing is a broad category of services, designed to protect your basement from water damage. Basement waterproofing services in Markham range from relatively simple services like basement crack repairs, window well installations to services that require more work – sump pump installations & repair, basement underpinning (floor lowering), exterior and interior basement waterproofing, weeping tile installation & cleaning and more.


Most often clients call for basement waterproofing once they discover some of the following signs:

  • Water coming up through the basement floor

  • Water leaking through foundation cracks

  • High humidity in the basement

  • Mold & mildew growing in the basement because of the high humidity

  • And even things like – sewer backup repairs etc.


Basement waterproofing services help protect your basement from water damage from different sources. For example – exterior basement waterproofing helps prevent water from entering your basement through the walls, while window well installations will prevent water from entering through windows etc.


If you are looking for basement waterproofing service, join thousands of happy clients that chose Aquamaster today!
Talk to one of our basement waterproofing contractors today & get 10% OFF our services!

Is Basement Waterproofing Worth it?

What are the Benefits of Basement Waterproofing in Markham?

Basement waterproofing is worth the investment. Arguably, the benefits of basement waterproofing services are well worth the cost. Basement waterproofing will help you to prevent basement leaks, but also to:


  • Prevents Basement Leaks – we highly recommend doing basement waterproofing before you need it. This way, instead of basement leak repair you will  be working to prevent basement leaks altogether.

  • Cozy Space – basement waterproofing (especially when paired with basement underpinning) will turn your basement into your favorite cozy & comfy space in your home.

  • Health Benefits – mold & mildew can often affect the air quality in your basement. Waterproofing can prevent mold, mildew and fungin from growing in your home. This way you home will be healthier.

  • Energy Savings – it take more effort for your HVAC system to work with humid air. Some of the basement waterproofing services can help make the air less humid. Chances are your energy bill will go down.

  • Protect your Investment – your home is your investment. When you waterproof your basement, your investment will be more safe from water damage.

  • Property Value - all of the above and other benefits of basement waterproofing will likely make your property a more desirable investment. Chances are, people will be willing to pay more for it.


Get one of our basement waterproofing contractors on the phone today to discuss what ideal waterproofing project should look like for your property.

Take advantage of years of quality basement waterproofing experience at Aquamaster. Start today!

Extarior Basement Waterproofing for a New Construction in Markham

Some of our Basement Waterproofing Services

What is Included in Basement Waterproofing Services?

Infographics - How Basement Waterproofing Works

Depending on your specific basement waterproofing objectives, the budget, the extent of the damage, and other factors our basement waterproofing contractors will help design an optimal approach to basement waterproofing for your specific property. Here is a couple of services that are the most important in Markham.

Also known as interior waterproofing is another approach to solving the wet basement problem. It typically involves applying a waterproof coating or membrane to the inside of the basement. Following the interior waterproofing methodology, the water is channeled with a weeping tile to the sump pump that pumps the water from the basement outside. This method is technically not waterproofing, but rather a technique designed to manage basement water.

A sump pump is a device used to remove water that has accumulated in a sump pit or basin, typically found in basements or crawl spaces of buildings. Its primary function is to prevent flooding and water damage by pumping water away from the building's foundation. The sump pump is typically installed in a specially constructed pit or basin called a sump pit. Water enters the pit through drains or natural groundwater infiltration. When the water level in the pit reaches a certain threshold, a float or pressure sensor activates the sump pump & it pumps the water out of your basement.

Basement Sewage Cleanup

As a part of basement waterproofing services, we help our clients solver problems caused by sewer backups that can severely damage your property.

Plumbing rough-ins refer to the installation of the initial plumbing infrastructure in a building before the walls and floors are finished. This includes installing pipes, vents, and drains that will connect to future plumbing fixtures such as sinks, toilets, and showers. One of our most popular services when working with new construction.

The perfect approach to basement waterproofing. Exterior waterproofing is a method of basement waterproofing used to protect your property from water damage. It's complex and comparatively expensive, but it can give long-lasting results and actually protect your foundation from contacting the groundwater. We are often called to deliver exterior waterproofing for the new construction, as well as for existing properties in Markham and beyond. Get one of our contractors on the phone today!

Nothing increases the value of one’s property as much as more square feet. Basement Underpinning Markham will create additional living space in your property. More square feet = more value. Basement floor lowering often goes hand in hand with basement waterproofing to help prevent future damage to your future basement renovations.

Basement walkout construction can be an excellent way to give a new life to your basement. From getting more air & sunlight to adding the convenience of a separate entrance. Basement walkouts are an excellent way to make your property more usable.

Weeping tile installation and weeping tile cleaning services are crucial parts of making sure your wet basement problems are solved. A weeping tile drainage system will help collect water around your foundation and will direct it away. This way the amount of water around your basement is reduced which can help reduce the damage it can do to the foundation walls and your basement.

Foundation cracks can be caused by a variety of factors, such as settlement, shifting soil, or water infiltration. As a building settles, the foundation may shift, causing cracks to form. Shifting soil, such as expansive clay soils, can also cause foundation cracks. Water infiltration can cause the soil around the foundation to expand and contract, which can put pressure on the foundation walls and cause cracks to form. Foundation crack repair method will depend on the size of the crack and other details.

Emergency Basement Flood Repair

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 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.

Before repairing the leak our team will work to identify the source. Basement leak detection will help identify the source of water infiltration in a basement. Water infiltration in a basement can be caused by a variety of factors, such as cracks in the foundation walls, damaged or clogged drainage systems, or groundwater seepage.

To detect basement leaks, professionals may perform a visual inspection of the basement walls and floors, or use specialized equipment such as moisture meters, thermal imaging cameras, or dye tests to pinpoint the source of the water infiltration.

Which Foundation Repair & Waterproofing Approach to Choose?

What is The Right Basement Waterproofing Method for You?

Interior waterproofing - involves the use of interior drainage systems, sump pumps, and/or coatings applied to the inside walls of the basement to prevent water from entering the basement. Interior basement waterproofing is not really basement waterproofing, but rather a water management solution. Water will still make it through the walls (and can potentially damage them), but will then hit the waterproofing membrane and will be directed to the drainage system to the sump pump and will be pushed outside the basement.

Benefits of interior waterproofing:

  • Less expensive than exterior waterproofing.

  • Does not require excavation and can be completed relatively quickly.

  • Effective in managing water that has already entered the basement.

  • Can improve indoor air quality by reducing humidity levels.

Exterior waterproofing - involves excavation around the perimeter of the foundation, application of a waterproof coating, installation of drainage systems, and backfilling with gravel to ensure water is directed away from the foundation.

Benefits of exterior waterproofing:

  • Provides a permanent solution to water infiltration by preventing water from reaching the foundation walls.

  • Can increase the overall value of the property.

  • Can prevent damage to the foundation walls, which can be costly to repair.

  • Protects the structural integrity of the building by preventing water from entering the basement or crawlspace.

While these are the major basement waterproofing solution, there is a lot of details to consider and many additional services to choose from. That's why it's optimal to get a professional basement waterproofing contractor on the phone and discuss what basement waterproofing solution will be right for your specific spenario.

  • Why is Basement Waterproofing Important?
    Your property may be protected from a number of unfortunate situations by having foundation and basement waterproofing done. Other then catching fire and burning down, flooding in a basement is one of the worst accidents that can happen in a home. When foundations begin to fracture, water can enter the basement and damage the bases of the flooring and walls. In the worst-case scenario, it may even cause a home to collapse. Basement waterproofing applies not just to basements but also the home’s foundations. Basement waterproofing is an essential fix if you have water, mildew, or rotting issues in your basement. Basement waterproofing can both solve any underlying issues in the space and be a preventative countermeasure against potential water damage. 1. Protects Structural Integrity of your Home - another advantage of waterproofing your basement is that it strengthens the structure of your home. Take note: your basement acts as the foundation for your home. It must be robust enough to complete this task. Waterproofing may ensure that your home lasts a prolonged lifespan. This is especially true if your home frequently experiences severe weather or adverse temperatures. 2. Increases the Value of Your Home - If you intend to sell your house in the near future, consider basement waterproofing. A home free of dampness and leaks is a crucial selling element for home buyers, making it more desirable. If you have not improved your basement in decades, buyers may consider it a significant inconvenience. This might give visitors a negative image of your home, especially if they smell the mustiness of old water. Distinct odors and signs of excess water can drive away potential buyers. Basements with waterproofing are also simpler to clean. This is another selling factor that can be desirable to future residents. Your home is more valuable if it is effectively protected and maintained. This adds more value to your home while you still live there and in the case that you do end up selling your home, a return on investment. In most circumstances, you may deduct the expenditures of the waterproofing job. 3. Prevents Mold & Mildew - Mold can be a serious problem if it develops in your home. Mold will gradually destroy the area where it colonizes and has the potential to create health problems for your home’s inhabitants. People who suffer from Bronchitis are especially vulnerable to mold and poor air quality. Mold grows from small spores that are invisible to the human eye and can be found in both outdoor and indoor air. Mold can start growing inside if it is on a damp surface. It simply requires moisture, water, and dust to thrive. Since dust is everywhere, if it settles on a damp surface, it might begin to grow indoors. That should give you an idea of the dangers of a damp or wet basement. However, basement waterproofing can prevent mold buildup from ever happening. Although mold typically stays unnoticed until it has developed, seeking the assistance of a qualified professional is a proactive decision. Certified specialists are trained to deal with mold in the home and are up to date on the latest products, techniques, and laws. Now, prevention is the greatest choice when it comes to keeping mold out of your home. So, if you discover a moisture or water problem, have it rectified or checked as soon as possible. With the benefits of basement waterproofing, there are two main types to consider, exterior basement waterproofing and interior basement waterproofing. Each with its own advantages and applications.
  • What are the Causes of a Leaky Basement?
    There is a number of things that commonly cause basement to leak, here is a couple of the most common ones. Basement Window Wells - Water penetration through your window sill can be caused by water buildup around near-grade basement windows. To remedy this, water entering your window area should be drained by adding or replacing defective window wells, as well as installing vertical weeping tile and a 3/4 gravel bedding. This will keep your foundation from leaking and your basement from flooding. Home Foundations made of Block or Bricks - Air gaps and mortar joints in block and brick walls may allow water to penetrate the crevices of your walls. Water infiltration inside block and brick foundations may be prevented and repaired using a mix of exterior and interior waterproofing methods. Water collecting between brick walls can be drained by drilling into the foundation’s interior to remove the water buildup. Basement Leaks Caused by Joints - joint leaks occur at the intersections of your wall and footing, your basement floor and foundation, and joints where additional extensions have been installed. To repair and fill these various sorts of joints, hydraulic cement is used. The altered cement is critical to preventing more damage and water leaks. Top of Foundation Leaks - If the sill is not sealed or if the original seal has deteriorated, the area where the foundation meets the brick might become a source of water leakage. Maintaining the sill with a waterproof sealant is critical for resolving this problem and avoiding water infiltration into the sill. Water may still pass through this place even if there is no hydrostatic pressure.
  • What is Internal Basement Waterproofing?
    Internal basement waterproofing is another method of stopping water damage and flooding in your basement. While external repairs provide the best solution, an internal project can be performed when foundation digging is not optimal. The internal waterproofing method may be the best option depending on a specific criteria: The area surrounding the exterior cannot be accessed because the space is confined or the area cannot be reached. The water problem is not a foundation leak but a hydrostatic pressure problem, which means the groundwater under the concrete slab raises up and down and causes the water to penetrate through the basement slab or where the wall meets the floor. This groundwater can also mean there could be an underground creek where the house was built. The internal system is an economical solution for unfinished living areas. Interior Wall & Floor Sealer - Internal waterproofing allows you to install drainage on the inside of your home, rerouting water intake to a correct point of release. The major advantage of implementing an internal waterproofing system is that it may collect water passing through the wall and beneath the footing. Basement walls that have been pierced will be drained away by our drainage membrane, creating a barrier between your wall and your living space. Water that travels beneath the footing might cause wet spots and leaks on your basement floor, which will be covered by the drainage board and drained through new weeping tiles. Sump Pumps - The fundamental component of every waterproofing system is a place where the water in the system may be discharged. When current drainage is clogged or there are no other drainage alternatives, your expert may recommend a sump pump installation. In your basement, a pit is dug to serve as the lowest point of your waterproofing system. Inside the pit, a high-quality plastic liner is put, allowing water to flow in by gravity drainage. The trigger of a sump pump, which ejects water from the sump pit to the exterior of the home, detects water buildup. We only utilize high-quality pumps and plumbing materials, and we also provide battery backup pumps that will keep working even if your power goes out. Before we perform any work, we provide you with the same inspection service. This is important to ensure that we cover every problem that is leading to a wet basement issue. After we have identified all of the trouble areas, we will provide you with the best internal waterproofing solution for your unique needs. Our internal waterproofing solutions may include repairing all cracks or breaks in your foundation walls, adding a waterproof membrane to the interior and replacing any defective weeping tiles. A French drain installation can also be part of your solution. This image gives you an overview of some of the problems that cause a wet basement: No matter how well your home was built, the basement can still develop leaks. Homes are constructed to meet industry and safety standards. However, over time, homes settle and the foundation walls and floor may crack. Other water problems may come from the water table under your home or changes in the city sewer system. A small leak now can turn into a major problem as time passes. Leaks also create mold, mildew and water damage. This can end up requiring very costly repairs to your home. Professional basement waterproofing requires knowledge and skills, along with the right resources and tools. A fully effective treatment includes addressing drainage and adding sealers. Once your basement is professionally waterproofed, it will remain dry. We guarantee this. Call us, or email us today, so we can provide you with an inspection and a cost effective solution to your leaky basement problem. Our licensed experts are ready to fix any type of foundation problem you are experiencing.
  • What Causes Basement Interior to Leak?
    Damp or Wet Basement Flooring - the source of water entering the basement through the concrete floor or where the basement walls meet the floor is most likely subterranean groundwater. Rising groundwater and saturation produce hydrostatic pressure during rainy weather, which pushes against the foundation and drives water through cracks and gaps in the concrete. This stress can cause cracks in the basement floor and walls. Visible White Substances on Walls - limestone, clay, mortar, and aggregate make up concrete and the white border or patch you observe is calcium evaporating from the block. It is a sign of water or too much moisture and should be treated carefully. It is referred to as efflorescence. Since this will only show on concrete, you will only be able to see it if your basement is not finished. Other indicators will develop if your basement is experiencing excessive leaking, water damage will nearly always show some kind of warning indication. Painted Walls Appear Damaged - paint can peel away from the surface it was painted on as it ages, similarly to peeling paint in older homes. It does not, however, flake off just because it is aged. Paint may peel for a variety of reasons, including the paint being the incorrect type for the material it was painted on, the surface not being properly prepared, or humidity or moisture in the walls you painted on. Wet surfaces will not hold paint. Water vapor will discolor it, causing it to peel off the wall or poke holes in it. This can be a direct indication that the walls of your basement are holding too much moisture or are very damp. Excess Rusting - metal rusts when there is an abundance of moisture in the atmosphere. Rust can form on fuse boxes, water heaters, jack posts, and appliances due to excessive moisture and humidity. When rust occurs, remove it completely and repaint it as soon as possible, and then analyze the source of the moisture. The rust will return if not addressed immediately.
  • How Exterior Basement Waterproofing Works?
    External waterproofing is the ideal solution to stem water damage, or to prevent excess water from getting past the foundation into the basement. However, external waterproofing does cause disruption to the outside of the home. The soil and underlying gravel have to be removed in order to get a close look at defects on the outside of the foundation. Power washing and then power drying the foundation walls is the best way to detect hairline cracks or fissures. Once the problem areas are uncovered, then each problem is handled separately. A flexible, cement sealant is applied to all the exposed areas of the foundation, which adds extra support and protection to the concrete foundation by strengthening the existing walls. Then a heavy polyurethane drainage mat is attached to the exposed walls. This extra protection on the outside ensures the foundation will ward off any excess buildup of groundwater. Outside drainage is another part of the waterproofing solution. Many homes still have the old-fashioned clay weeping tiles, which degrade and clog over time. Outdated drainage pipes are replaced with modern weeping tiles, which are made of plastic and perforated so they don’t clog as easily. Done correctly, external waterproofing will keep the foundation and basement watertight for decades. We are going to demonstrate the best practices of basement waterproofing that have been tested, proven and working for many years for all our clients. We are not talking about magic waterproof paints, channel drain tiles that sit on top of the footing, molding drainage system and e.c. None of them completely, and more important properly solve the wet basement issue. Most of the waterproofing systems have been designed for easy installation, and not for how well they will perform. That little box of tricks doesn’t take you very far. In fact, it sometimes takes you nowhere. The real best practice isn’t a particular product at all. It is a well-defined series of steps that conduct to effectively performing system. The Aquamaster’s approach is significantly different from quick fixes. It’s not based on guesswork, and it doesn’t have the excitement and appeal of magic products. Our solid knowledge, craft, skill, and expertise prove that it always works. Exterior waterproofing is a method of repairing a leaky basement from the outside of your home by exposing the foundation and applying the necessary waterproofing material to create a foundation waterproofing system that redirects and disperses water away from your foundation walls. This is one of the most effective waterproofing options for basement leaks and the most typical method of basement foundation repair. Aquamaster has been providing professional waterproofing to Toronto homes for many years. An external waterproofing solution is the best choice to provide the highest level of protection against basement flooding and water damage. Our experts understand the processes fully and we offer complete transparency in all the work we perform. We will explain every step of the process to you so that you will know what to expect from our work. Poor foundation drainage, high levels of groundwater, major storms and foundation cracks can all contribute to a wet basement and water damage. We will consult with you and inspect your home, drainage systems and property. We look for any problem areas and will discuss the recommended solutions to provide you with permanent protection from leaks and moisture. Every home is different and Aquamaster provides customized solutions for every job we complete. The work may involve repairing cracks with epoxy or replacing the waterproofing membrane along your foundations. In the majority of cases, external waterproofing involves digging down to the footers of your foundation to locate all the problem areas and ensure that your basement is fully protected. On some occasions, we may not have to completely dig out the foundation. You may simply need to have your weeping tiles replaced or a French drain installed. If your existing drains are clogged, the groundwater will back up and place additional pressure on the foundation walls, forcing water into any cracks. A complete inspection of your home’s drainage system and foundation is the only way to truly know what work needs to be done. The experts at Aquamaster will provide you with a customized plan to repair your basement that includes a full guarantee. We understand waterproofing in Toronto and the Greater Toronto area and our staff are experienced professionals.

Why Choose Us?

3,000+ Happy Clients Chose Aquamaster


True Warranty Coverage

Work, meterial 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 20% 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!

Basement Waterproofing Reviews

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



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And Southern Ontario...

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