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Foundation Repair & Basement Waterproofing Welland

Not your Average Waterproofers, Toronto's Best

Welcome to Aquamaster, one of the leading basement waterproofing companies in Welland. Our services range from simple basement leak detection and foundation crack repairs to complex projects like sump pump installation and repair, weeping tile installation, basement waterproofing and more.


If you are looking for quality, your search is over, you found us. Get started today with 10% off!

Built to Last for Decades

Basement Waterproofing Contractors

Who can Benefit from Basement Waterproofing?

Signs that You Need Basement Waterproofing in Welland

Basement waterproofing projects can include a variety of services depending on the extent of water damage, how much ground water your area has, your budget and your objectives. From simple basement wall and floor crack repairs to complex basement waterproofing services that require excavation, concrete work and more.


Here is a couple of signs that you may need basement waterproofing Welland:


  • Foundation Cracks – foundation crack repair is one of the simplest services under waterproofing and one of the first steps for basement leak repairs

  • Basement Leaks – if basement water leaks are a regular occurrence for your home, constant basement leak repairs can only do as much. You may want to consult a foundation repair contractor to map the best path forward for your property

  • Increased Humidity – high humidity in your basement, wet basement walls and wet basement floors are a sign that you may need basement waterproofing.

  • Water Coming up from a Basement Floor – a common occurrence in Welland, ON.

  • Protect Your Investment – basement waterproofing is not only a remedy for the problems above but also a way to prevent future problems. Our basement waterproofing contractors are often called to work on new construction projects or to help protect existing houses that don’t have basement leaks yet.


Many of the problems above tend to get worse over time. That’s why, if you are experiencing these or other problems, don’t wit get a basement waterproofing expert on the phone today!

Is Basement Waterproofing Worth It?

What are the Benefits of Basement Waterproofign in Welland?

Basement waterproofing is an excellent investment for many properties in Welland and beyond. Here is the most common benefits our clients look for when starting basement waterproofing projects:


  • Prevents Basement Water Leaks – unfortunately, in many cases, basement waterproofing projects start when clients already had water leaks in their basements. Waterproofing is a good way to prevent basement leaks from happening in the future

  • Extend Life of Your Foundation – groundwater can cause water damage to the foundation of your house. Exterior basement waterproofing involves an application of a waterproofing membrane that will seal your foundation from the groundwater. As a result, your foundation will live longer

  • Protects Construction Materials – when water makes it to your basement it can damage your walls, floors, paint and more. Quality basement waterproofing solution will help prevent water from getting to these materials

  • Helps Prevent Basement Floods – unfortunately basement wall & floor leaks get worse over time and can turn into floods. Basement waterproofing can include a number of services the help prevent basement floods

  • Protects your Investment – properties are big investments. Basement waterproofing services can protect your investment from water damage

  • Property Value – protecting your investment from water damage often makes your property more desirable. As a result, it’s the price is likely to increase.


Our team of experienced waterproofing contractors can help design the right basement waterproofing solution for your residential or commercial property in Welland. If you are looking for quality, your search is over, you found us. Get one of our basement waterproofing experts on the phone today!

Welland Basement Waterproofing Contractors for exterior waterproofing new construction

What Basement Waterproofing Approach is Right for You?

Interior vs Exterior Basement Waterproofing - Considerations

Basement waterproofing is a process of preventing water from entering your basement and causing damage to your home. There are two main types of basement waterproofing: exterior and interior.

Exterior waterproofing involves excavating the soil around the foundation walls and applying a waterproof coating or membrane to the outside of the walls. Exterior waterproofing is more expensive than interior waterproofing because it requires excavation and more extensive work, but it provides long-lasting protection for your basement and helps prevent water from making it inside your basement.

Interior waterproofing on the other hand is rather a water management technique, as opposed to waterproofing. It involves installing a drainage system and sump pump inside your basement to collect and remove any water that makes it through. Interior waterproofing is less expensive than exterior waterproofing and can be completed in a shorter amount of time, but it does not provide the same level of protection as exterior waterproofing. Plus it requires maintenance of the waterproofing system - sump pump repair, sump pump maintenance, sump pit cleaning etc.

Both exterior and interior waterproofing have their benefits, and the best option for your home will depend on your specific needs and circumstances. If you're unsure which option is best for you, it's always a good idea to consult with a professional basement waterproofing contractor who can evaluate your home and recommend the best solution.

What Services are Included in Basement Waterproofing Welland

Basement Waterproofing can Include Some of the Following Services

Basement Leak Repairs in Welland

Our waterproofers can help design the right basement waterproofing solution for your property based on the amount of ground water, the extent of the water damage, your objectives, and your budget. Here are a couple of services that are often included in basement waterproofing.

Exterior basement waterproofing is a method of preventing water from entering a basement by applying a waterproof coating or membrane to the outside of the foundation walls. This process involves excavating the soil around the foundation walls to expose the surface of the walls. Foundation cracks are repaired and waterproofing materials are applied. Weeping tiles (drainage) is installed and the trench is backfilled.

A sump pump installation is a process of installing a pump in a basement or crawlspace to remove any water that accumulates in the sump basin. A sump pump is typically installed in homes that are prone to flooding or have issues with excess groundwater.

The installation process involves digging a hole in the basement or crawlspace floor and placing a sump basin or pit in the hole. The sump basin collects any water that enters the basement or crawlspace and directs it to the sump pump. The sump pump then pumps the water out of the basement or crawlspace and away from the foundation of the home. We recommend getting regular sump pump maintenance and repairing the sump pump as soon as it breaks to help prevent  basement floods.

Basement plumbing rough-ins are the initial plumbing installations that are done during the construction or renovation of a basement. These rough-ins are typically installed before the walls and flooring are finished, making it easier to access the pipes and fixtures.

Basement plumbing rough-ins typically include installing the pipes and drains for the basement's bathroom, laundry room, and any other plumbing fixtures. 

Basement leak detection and repair is the process of identifying and fixing any leaks or water infiltration issues in a basement. Basements are prone to water damage and leaks due to their location below ground level, and these issues can cause serious damage to the structure of the building and the contents of the basement. If your see water on your basement walls or floors but are not sure where it's coming from, basement leak detection may help identify the source of the water leak. While basement leak repair service will help fix it.

Interior basement waterproofing is a method of preventing water from entering a basement by installing a drainage system and sump pump inside the basement. This process involves excavating a small trench around the perimeter of the basement floor, which is then filled with gravel and a perforated pipe. This pipe is connected to a sump pump, which collects and removes any water that enters the basement.

Crawlspace Encapsulation

Crawlspace encapsulation is the process of sealing the crawl space of a building with a vapor barrier to prevent moisture and other environmental elements from entering. The encapsulation process involves sealing the walls and floors of the crawl space with a heavy-duty plastic sheet or other barrier material, along with sealing any openings, such as vents or pipes.

Foundation repair refers to the process of repairing and stabilizing the foundation of a building that has been damaged or compromised. Foundation damage can be caused by a variety of factors, including soil movement, water damage, and poor construction practices.

Some common signs of foundation damage include cracks in the walls or floors, sloping or uneven floors, and doors or windows that are difficult to open or close.

The foundation repair process typically involves an inspection by a professional contractor to determine the cause and extent of the damage. Depending on the severity of the damage, the repair may involve simple cosmetic fixes, such as patching cracks, or more extensive structural repairs, such as underpinning or the installation of support beams.

Foundation crack repair is the process of fixing cracks in a home's foundation to prevent water from entering the basement or crawlspace. Cracks in a foundation can occur due to a variety of reasons, including settlement, poor construction, or changes in temperature and humidity.

Foundation crack repair typically involves filling the crack with an epoxy or polyurethane injection. This process seals the crack and prevents water from seeping into the basement or crawlspace. The epoxy or polyurethane injection material also helps to stabilize the foundation and prevent further cracking.

Basement underpinning is a method of strengthening and increasing the depth of a home's foundation. This process involves excavating the soil beneath the existing foundation and extending it downwards to create additional space or support. Watch our video on the basement underpinning process at Aquamaster.

Weeping tile, also known as drain tile or French drain, is a type of drainage system that is installed around the foundation of a building to prevent water from entering the basement or crawlspace.

A weeping tile system typically consists of a perforated pipe that is surrounded by gravel or crushed stone. The pipe is installed around the perimeter of the foundation, and any water that collects in the soil around the foundation is directed into the weeping tile and carried away from the foundation.

  • 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


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

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



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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.


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


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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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Proudly Serving Southern Ontario and Beyond



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And Southern Ontario...

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