top of page
Header-Scarborough-Cartoon copy.jpg

Basement Waterproofing Scarborough


Wet & Leaky Basement Repairs

Aquamaster Basement Waterproofing Scarborough is considered one of the leading basement waterproofing companies in the area. Our flexible pricing options, licensed & insured team, as well as quality materials and top-notch workmanship allowed us to earn The Best of Basement Waterproofing for three years straight!


Our services include basement waterproofing & foundation repairs of any difficulty. From basement leak repairs, interior & exterior waterproofing to foundation repair, basement underpinning and more.


We offer a future-proof 25 years warranty. Book a FREE estimate today!

Built to Last for Decades

Aquamaster-Team copy-min.jpg

Common Wet & Leaky Basement Problems

Common Basement Waterproofing Problems in Scarborough

We recommend consulting with professional basement waterproofing contractors as soon as you see a basement leak or experience any other wet or damp basement problems.


We often see people living in Scarborough come to us for the following wet basement repairs:

  • Leak Detection – in some cases you may see wet basement walls or floors and not know where the water comes from, leak detection services will help

  • Basement Floor – we often see water coming up from the basement floor or entering the basement where wall & floor meet

  • Damp Smell – can be caused by a variety of problems including mold & mildew

  • Water Pooling on the basement floor

  • High Humidity

  • Other Problems – like efflorescence, cracked concrete, tie rod leaks, and more


It’s often a good idea to opt in for basement waterproofing before you get the first basement leak, as this can potentially save you a lot of money on foundation repairs & and renovations in the future.


But any basement waterproofing project, no matter how big or small start with a FREE estimate, talk to one of our experts today!

How Long Does Basement Waterproofing Take?

How Long Will my Project Take?

An average basement waterproofing project takes from 1 day to 2+ weeks to complete. Our experts will estimate specific timeline during the FREE estimate. Duration will depend of the scope of work, materials, how easy it is to access the basement, the materials your basement is made of, and more. You can experts Internal Waterproofing to take up to 2 weeks, Exterior Waterproofing about 2 weeks, Basement Wall Crack Repair - typically take 1 day, while Foundation Repair time varies depending on the extent of the damage. Bench Footing and Basement Underpinning will take about 5 weeks to complete. Window well installation normally takes 1-2 days, while Crawlspace Encapsulation will take 3-10 days. If you are looking for a Basement Walkout Construction you can expect your project to last about 4 weeks.

Learn More About Timelines

Basement Waterproofing Cost Toronto

How Much Does it Cost?

You can expect to pay $70-$350 per linear foot of basement waterproofing in Scarborough. An average price for this service sits at $100/linear foot. When estimating the price our waterproofing contractors will account for the ease of access to the basement walls, foundation damage (if any), waterproofing materials used in the project and other factors. Our scope of work for waterproofing projects can include: Interior Waterproofing is $70, Exterior Waterproofing ~$90, Foundation Repairs (from $1,500-$3,200) depending on the depth of the crack. An addition of  Sump Pump Installation will cost around $500, Window Well Installation - from $1,600, and Battery Backup Pump price starts from $1,200. 

Learn More About Price of Basement Waterproofing

Is Basement Waterproofing Worth it?

What are the Benefits of Basement Waterproofing?

There is a number of benefits associated with basement waterproofing:

  • Prevent Basement Leaks - basement waterproofing helps prevent basement leaks that will result in additional expenses to fix.


  • Prevent Structural Damage - your foundation will be protected against water. This means increased life span of the materials used in construction.


  • Value - this investment will increase the value of your property.

  • Health Benefits - basement waterproofing will help prevent mold, mildew, and fungus, which in turn will make your life healthier. These bacteria present health risks and can cause allergies and respiratory problems in people and animals.


  • Energy saving - your basement will better retain warmth and you will spend less on heating & cooling.


Some of Our Basement Waterproofing Projects

Flexible Basement Waterproofing Services Scarborough

Infographics showing what problems basement waterproofing services can solve - basement leaks, wet walls, floor, water seepage and more

When designing your project, our team of waterproofing contractors will consider a number of factors – the location of the property, how much groundwater is in your area, the extent of water damage, your plans for the property, your budget, and more. Depending on these factors we will recommend the right basement waterproofing services.

Example of Exterior Basement Waterproofing Project in Toronto, near CN Tower

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. The foundations is then powerwashed & dryed the foundation walls, cracks are uncovered & fixed. A flexible, cement sealant is applied to all the exposed areas of the foundation. 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.

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

Basement Underpinning Project in Progress near Nathan Phillips Square in Toronto

Basement underpinning or basement floor lowering services. An excellent way to turn your basement into a comfy living space. Basement lowering will create additional space in your basement and is a smart investment before finishing the walls and ceilings in your underground cozy space. Both floor lowering and basement waterproofing services are a great way to increase the value of your home.

Basement Underpinning Cost - $85-$450 per linear foot

Waterproofing Contractor Installing a Window Well

Window wells are excavated, below-ground spaces around basement windows designed to allow natural light into the basement while also providing an emergency exit route. They typically consist of a small, sloped area with a window at the bottom and are constructed with materials like metal, concrete, or plastic.

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

Plumbing Rough Ins Installed in the Basement

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.

Example of Interior Basement Waterproofing Project

Also known as interior waterproofing is another approach to solving the damp or wet basement problem. It typically involves applying a waterproof coating or membrane to the inside of a building or other structure, such as a basement, crawl space, or foundation walls. This waterproofing helps prevent excessive moisture from entering the structure, which can cause a variety of problems, such as mold growth, structural damage, and decreased insulation. In addition to preventing water damage, interior waterproofing can also help reduce energy costs by making the space cooler and more energy efficient.

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

Basement Wall Crack Repair in Progress

Foundation cracks are almost guaranteed to turn into a basement leak in the future, if not repaired in time. In order to deliver basement crack repair for your wall and floor they are injected with an epoxy-resin solution that bonds the pieces of the concrete foundation together. In some cases, more extensive foundation repairs may be needed.

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


Basement leak detection works by identifying and locating sources of water infiltration or moisture in a basement or below-ground space. Detecting leaks early is crucial to prevent water damage, mold growth, and structural issues. Leak detection can involve a number of tools such as moisture meters, thermal imaging, visual inspection and more.

Waterproofing Contractors installing a weeping tile in front of CN Tower

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.

Sump Pump Installation and Battery Backup Replacement Example

Sump pumps are mechanical devices that are 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 via discharge line. A sump pump is a common element of internal waterproofing systems that can include one or more sump pumps.

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

Installation of Backwater Valve or a Backflow Preventer

Backwater valves, also known as a backflow preventers or sewer backup valves are used to prevent the reverse flow of wastewater or sewage into a building's plumbing system. It is an essential component in preventing flooding and contamination in homes and commercial properties, particularly in areas prone to sewage backups or flooding.

A waterproofer sealing the crawlspace of a building

If you are looking for quality crawlspace encapsulation services, you found it. Crawlspace encapsulation is a process of sealing a home's crawlspace from the outside environment to protect against moisture, pests, and other potential problems. It involves creating a vapor barrier, sealing off any air leaks, and insulating the space to ensure it remains dry and free of mold and other issues. This can involve installing plastic sheeting, foam insulation, and other materials to completely seal off the crawlspace and create an airtight barrier.

Example of Basement Walkout

Basement walkouts, also known as basement walk-ups or basement egress, refer to an exterior entrance or exit from the basement level of a building. These walkouts typically include stairs or a ramp leading from the basement to the ground level. Our team can help with basement walkout construction services to add windows, doors and functionality for your basement!


Waterproofing Products we Use

Basement Waterproofing Materials in Our Projects

We are so certain of the quality of our basement waterproofing, that we offer 25-year transferable warranty with our service. This is because we use some of the best basement waterproofing materials in our projects.

Delta MS Air Gaps, Aqua Bloc 770-06 liquid waterproofing membranes, DMX Drain, Parging Mix, top-quality 3/4 inch limestone gravel, Bakor 990-06 yellow Jacket Fibre Mesh and so much more. These are just some of the waterproofing products we use in our projects.

Learn more about waterproofing materials over the link below, or get one of our contractors on the phone today to discuss what materials may be the best fir for your project. Book a FREE estimate today!

  • 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.

Basement Waterproofing Reviews

What Our Clients Say?

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!

royal-ontario-museum (2).png

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!

Get Started with 10% Off Today!

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

bottom of page