Basement Waterproofing Toronto & GTA
Basement waterproofing in Toronto helps protect homes from seepage, damp conditions, mould risks, and damage caused by groundwater. At Aquamaster, we provide the basement waterproofing Toronto homeowners need for wet basements, foundation cracks, and drainage concerns since 2009. Our basement waterproofing services in Toronto 24/7 include interior and exterior systems, sump pumps, weeping tile, crack repair, and leak detection. We inspect each basement in Toronto carefully and recommend practical waterproofing based on where the water is entering and how the property is built.
Licence Number: T94-4200197
Trade Number: P23453
4.9/5 on Google
From 300+ Verified Reviews
Aquamaster — Award-Winning Basement Waterproofing Contractors Toronto
Aquamaster has proudly served Toronto, GTA and surrounding areas in Southern Ontario. We’ve been a Winner of the Best Of award on HomeStars for 3 consecutive years!
Our Basement Waterproofing Services for Toronto Homes
When designing your project, our team of waterproofing contractors in Toronto 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 recommend the right basement waterproofing services.
Interior basement waterproofing in Toronto manages seepage from inside your home when exterior excavation is impractical or unnecessary. A drainage channel and waterproof membrane direct water toward a sump pump, where it can be moved safely away. This system helps control hydrostatic pressure, reduce damp conditions, and protect your basement from recurring water entry.
Interior Waterproofing Cost – from $80+ per linear ft
Exterior basement waterproofing in Toronto stops water before it passes through your foundation walls. The process may include excavation, crack repairs, a waterproof membrane, and improved drainage around the footing. By addressing moisture at the outside face of the foundation, it helps protect your basement, stored belongings, and structural materials from ongoing water intrusion.
Exterior Waterproofing Cost – from $100+ per linear ft
Leaky basement repair addresses the source and extent of a confirmed water problem. Depending on the diagnosis, work may involve crack repair, interior drainage, exterior waterproofing, a new membrane, or weeping tile service. Choosing the right method helps stop recurring leaks, limit moisture damage, and keep the basement safer for storage or finished living space.
Basement Leak Repair Cost – from $80+ (inside), from $100+ (outside)
Basement leak detection in Toronto pinpoints how and where water is entering before repair work begins. Depending on the signs, technicians may use moisture meters, thermal imaging, water testing, pressure tests, or smoke tests. A clear diagnosis helps separate foundation seepage from plumbing or drainage issues and supports a repair plan suited to the actual cause.
Basement Leak Detection Cost – from $299+ per detection
Foundation crack repair seals openings that allow water into basement walls. The right approach depends on the crack’s location, condition, and cause, with options such as epoxy or polyurethane injection, exterior excavation, waterproof membranes, or drainage improvements. A proper repair helps block moisture while addressing the conditions contributing to the leak.
Foundation Crack Repair Cost – inside from $600+, outside from $1800+
Sump pump installation and repair helps remove groundwater collected beneath your basement. Water enters a sump pit, then the pump sends it through a discharge line and away from the foundation. Installation, maintenance, repairs, and battery backup options help the system keep working when heavy rain, rising groundwater, or a power outage puts your basement at risk.
Sump Pump Cost – from $700+ per system (depends on pump, installation and pit)
Weeping tile installation collects groundwater around the foundation before it can build pressure against basement walls. Perforated pipe is placed in gravel and connected to a suitable outlet or sump system, creating a path for water to drain away. Interior and exterior systems can help manage seepage and reduce the risk of recurring basement leaks.
Weeping Tile Installation Cost – from $30+ per linear ft
Window well installation helps keep soil and water away from below-grade basement windows. A properly sized well, clear drainage, and a secure connection to the surrounding system allow rain and melting snow to drain instead of collecting against the glass or frame. This helps reduce window leaks while preserving light into the basement.
Window Well Installation Cost – from $1,800+ per well
Backwater valve installation helps protect your Toronto basement when sewage reverses through the main drain during a municipal sewer backup or blockage. The mechanical valve closes when it detects reverse flow, helping stop wastewater from entering through basement fixtures. Proper placement and access for maintenance support reliable protection when the sewer system is under pressure.
Backwater Valve Installation Cost – from $2200+ per installation
Crawlspace encapsulation controls ground moisture and humid air beneath your home. The work may include a sealed vapour barrier, closed vents, drainage, foundation crack repairs, and a dehumidifier where needed. Reducing moisture in this overlooked area helps limit mould and mildew conditions, protect wood and insulation, and support healthier air throughout the home.
Crawlspace Encapsulation Cost – from $30+ per sq ft
Structural foundation repair addresses cracks, bowing walls, uneven floors, and other signs that a foundation has shifted or weakened. After the cause and extent of the damage are assessed, repairs may include crack injection, carbon fibre reinforcement, steel bracing, or underpinning. The right method helps restore stability and prevent the problem from getting worse.
Structural Foundation Repair Cost – custom quote
Drain cleaning and repair addresses slow drains, recurring blockages, leaks, damaged pipes, and backed-up fixtures. A camera inspection can locate the cause before snaking or high-pressure jetting clears the line. When cleaning is not enough, sectional repair, pipe relining, joint sealing, root removal, or replacement can restore reliable flow and help prevent water damage.
Drain Cleaning Cost – from $399+ (includes camera and snake)
Is Water Getting Into Your Basement?
Aquamaster Basement Waterproofing can help with many services, all designed to prevent wet basement problems and repair leaks. Depending on the specific source of the leak, your project can include a variety of leaky basement services.
There are several telltale signs that you may need to waterproof your basement, and recognizing those signs is the first step in preventing wet basement problems and frequent repairs. Here are some of the things to look out for:
Water Coming Up from the Basement Floor
There are several potential causes of water coming up from the basement floor, the most common being groundwater.
Wet Basement Walls or Floor
If the foundation wall or floor in your basement feels damp when you touch it, you may have a leak. In scenarios like this, our foundation waterproofing contractors will find and then fix the source of the leak before the problem escalates.
Tie Rod Leaks
Tie rods hold together the form for foundation pouring. Once the tie rods are removed, a hole in the foundation may remain, providing a pathway for water to enter your basement.
High Humidity
High humidity is one sign that you may have a leaky basement. When moisture enters the foundation, humidity in your basement increases.
Musty Odor
A musty odour may be a sign that mould or other fungi are growing in your basement. All fungi need moisture to flourish, so if you notice a stale smell in your basement, there’s likely a leak somewhere.
Wet Wall Stains
Water stains on your basement walls may be caused by water leaking from pipes, plumbing fixtures, or a crack in the foundation. This is a sign that you should contact professional waterproofing contractors to identify and fix the underlying problem.
Basement Leak Prevention
Ideally, waterproofing should be used to prevent basement leaks before they happen, as opposed to leak detection and repair after they happen.
If you want to protect your basement and your property from potential water damage, Aquamaster Waterproofing is here to help. Call one of our experts today, and start with 10% OFF!
Basement Waterproofing Costs in Toronto
The average cost for basement waterproofing in Toronto in 2026 ranges from $80-$350 per linear foot, with an average of $100 per linear foot. The specific price will depend on the waterproofing method, depth of the foundation, extent of the foundation damage, scope of the project, and waterproofing materials used.
The team at Aquamaster can help you select the right service for the right price. During your consultation, we can explain your options clearly so you can choose a waterproofing solution that fits your home, budget, and long-term needs. Here are the average costs of some of our most popular basement waterproofing services:
| Waterproofing Service | Starting Price |
|---|---|
| Interior Basement Waterproofing | From $80 per linear ft |
| Exterior Basement Waterproofing | From $100 per linear ft |
| Foundation Crack Repair — Interior | From $600 |
| Foundation Crack Repair — Exterior | From $1,800 |
| Sump Pump Installation & Repair | From $700 per system |
| Weeping Tile Installation | From $30 per linear ft |
| Window Well Installation | From $1,800 per well |
| Backwater Valve Installation | From $2,200 per installation |
| Crawlspace Encapsulation | From $30 per sq ft |
| Basement Leak Detection | From $299 per assessment |
| Structural Foundation Repair | Custom quote |
Prices are starting estimates. Your final quote depends on the scope of work, foundation depth, property access and materials required. Sump pump pricing also depends on the pump, installation requirements and sump pit.
Toronto Basement Flooding Protection Rebates & Subsidies
Eligible Toronto homeowners may qualify for financial help through the City’s Basement Flooding Protection Subsidy Program. The program currently provides up to $6,650 per property across approved measures, subject to program requirements and available funding. Eligible work may include:
- A home plumbing assessment
- Backwater valve installation
- Sump pump installation and eligible battery backup power
- Qualifying severance and capping of storm sewer or external weeping tile connections
GET YOUR FREE QUOTE FOR WATERPROOFING SERVICE NOW!
Stop water issues before they spread — request your free waterproofing quote today and get clear pricing, fast response times, and proven protection for your home.
Recent Basement Waterproofing Work in Toronto and the GTA
When it comes to assessing the quality of a service, words can only go so far. To help you get a better sense of what we do and how we do it, we’ve put together a portfolio of our past jobs. Over the years we’ve completed a variety of plumbing, basement lowering, and waterproofing projects in Toronto and the GTA. Below you’ll find photos from some of our most recent work.
See Our Work in Action
Why Toronto Homeowners Choose Aquamaster?
Since 2009, AquaMaster has completed 3,000+ projects across Toronto and the GTA. Our licensed and insured team identifies the source of basement leaks, explains your repair options, and provides a clear estimate for the recommended waterproofing work.
Comprehensive Warranty Coverage
We provide a 25-year transferrable warranty on labour and materials.
Emergency
Services
Services
Call day or night for emergency waterproofing and plumbing repairs. We have a team available 24/7.
Licensed
and Insured
and Insured
We’re fully licensed and insured to provide plumbing, underpinning, concrete, and waterproofing services.
Excellent
Price
Price
We offer 10% off your first service, free estimates, and competitive pricing.
Industry
Experience
Experience
We’re more than just one waterproofing contractor; our team includes 20+ experts with many years of combined experience.
Proudly Serving
Southern Ontario
Southern Ontario
All of Southern Ontario, from Toronto to Collingwood and beyond, can rely on Aquamaster.
Best
Materials
Materials
We only use first-rate materials, including DMX Drain, Delta-MS Air Gap, Parging Mix, and ¾-inch limestone gravel.
Peace
of Mind
of Mind
We guarantee protection from damp, musty, and wet basements.
What Our Waterproofing Customers Say
200+ Google reviews · 4.9/5 avg · 300+ projects reviewed
What to Expect From Inspection to Completion
Waterproofing processes can differ from one job to the next depending on the method we’re using and the property we’re working on. The following is a simple overview of how we typically complete waterproofing projects from start to finish:
Site Assessment
We start by identifying where the water and/or moisture is coming from. Cracks in the wall, water seepage through the concrete floor, clogged drainage, and hydrostatic pressure are a few common causes.
Excavation Along the Foundation
We excavate down to the footing to expose the foundation walls. In open areas, we use an excavator to move soil efficiently. Around gas lines, porches, tight property lines, or landscaped sections, we switch to hand digging with shovels and digging bars to prevent damage.
Foundation Wall Preparation
We clean the exposed wall down to the solid concrete. That means removing old cement coatings, loose material, and built-up dirt. This allows the waterproofing membrane to bond directly to the foundation instead of sitting on weak or separated layers.
Crack Repair & Waterproofing Application
We seal foundation cracks with polyurethane injections, which stay flexible through seasonal movement. We then apply Aqua-Bloc waterproofing to form the main exterior barrier. To prevent groundwater from pressing against the wall, we install a DMX Drain dimple drainage membrane to guide the water downward.
Drainage Work
We install new drainage piping to replace weeping tiles that are blocked, crushed, or made of older clay pipe. In areas with high hydrostatic pressure and/or known drainage issues, we’ll integrate a sump pump into the system. This ensures active groundwater removal, preventing pressure buildup around the foundation.
Backfill & Grading
We backfill the excavated soil in controlled layers and compact it to make sure it holds its shape against the foundation. Once compacted, we shape the final grade to guide rain and snowmelt away from the foundation. This keeps water from pooling along the basement walls.
How Long Does it Take to Waterproof a Basement?
How Long Does it Take to Waterproof a Basement?
Project timelines depend on the waterproofing method, the extent of repairs, property access and weather conditions. During your free on-site assessment, Aquamaster will explain the work required and confirm your expected schedule.
| Waterproofing Work | Duration |
|---|---|
| Interior Waterproofing | 2 weeks |
| Exterior Waterproofing | 2 weeks |
| Wall Crack Repair | 1 day |
| Foundation Repair | varies depending on the extent of the damage |
| Bench Footing | 5 weeks |
| Basement Underpinning | 5 weeks |
| Window well installation | 1-2 days |
| Crawlspace Encapsulation | 3-10 days |
| Basement Walkout Construction | 4 weeks |
Basement Waterproofing Materials We Use
The quality of a waterproofing project depends on the choice of waterproofing materials, workmanship, and the process followed. As one of Toronto’s top basement waterproofing companies, we use only top-quality materials in all our projects, so you can rest assured that your basement waterproofing will be of the highest quality. We use materials such as:
- Delta-MS Air Gap
- Parging Mix
- Top-quality ¾-inch limestone gravel
- Aqua Bloc 770-06 liquid waterproofing membranes
- Bakor 990-06 Yellow Jacket Fibre Mesh
- DMX Drain
Book a free estimate today to discuss materials that best fit your needs with our waterproofing contractors!
Helpful Guides for Basement Water Problems
At Aquamaster, we share our expert waterproofing advice through blogs and articles. We want to make sure you receive the best information possible when dealing with plumbing or waterproofing problems. We answer questions, provide insights, and offer tips for common water infiltration and plumbing issues. Below, you’ll find some of our most popular and recent pieces. Browse through them to discover everything you need to know about waterproofing, wet basements, underpinning, and more!
How to Choose the Right Waterproofing Company in Toronto?
With so many options to choose from, finding the right waterproofing company in Toronto can be tough. When you’re dealing
What to do When Sump Pump Overflows?
An overflowing sump pump is usually caused by power loss, blocked water flow, mechanical failure, or more groundwater than the
Why is Water Coming Up From the Basement Floor?
Learn about basement water leaks and seepage, including common causes and signs. From leaking pipes to clogged gutters, this article will tell you all you need to know about wet basements and how to prevent them.
How to Install a Weeping Tile System in Toronto: Complete Guide
Discover what weeping tiles are, how they work, the different types, and the cost of materials plus installation. This complete guide to weeping tiles covers everything you need to know, including the difference between interior and exterior weeping tiles as well as long-term costs and considerations.
Aquamaster Basement Waterproofing in Media
Everyone’s talking about Aquamaster and our superior basement waterproofing in Toronto and the GTA. We’ve established ourselves among the top waterproofing companies in the area and now the Toronto Star, Guelph Today, and other reputable publications are featuring us in their articles. Read through some of the latest articles below.
Your Basement Waterproofing Questions Answered
Here are some of the most common questions we get about our waterproofing services in Toronto.
How much will waterproofing my basement cost in Toronto?
Costs depend on the source of the leak, foundation depth, access, wall length, and repair method. Interior waterproofing generally ranges from $80–$180+ per linear foot, while exterior work may cost $100–$350+ per linear foot. Complete projects can range from approximately $8,000–$35,000+. An on-site inspection is needed for accurate pricing.
Read out Waterproofing Cost Guide
Can a basement be waterproofed from the inside only?
Yes. Interior waterproofing can manage seepage by directing water into a drainage system and sump pump. It is often a practical choice when exterior excavation is difficult or unnecessary. However, exterior waterproofing may be recommended when water must be stopped at the foundation wall. An inspection helps determine which approach fits the problem.
Will the work disturb my finished basement or landscaping?
Interior work usually requires opening a narrow section of the basement floor and may involve removing lower wall finishes near the work area. Exterior waterproofing requires excavation beside the foundation, which can temporarily affect gardens, walkways, decks, or other features. Before work begins, Aquamaster explains what must be moved and what restoration is included.
How long will my waterproofing project take in Toronto?
Many interior waterproofing projects take approximately one to five days. Exterior projects commonly take five to ten days, although larger or more complicated jobs may take up to two weeks. Foundation depth, access, weather, repair length, and structural conditions can all affect the schedule. Aquamaster provides a clearer timeline after inspecting the property.
What does Aquamaster’s waterproofing warranty cover?
Qualifying Aquamaster waterproofing systems include a 25-year transferable warranty covering the work, materials, and labour described in your agreement. Because coverage can vary by service and installed system, review the written warranty for maintenance requirements, exclusions, and claim procedures. The transferable coverage remains with the property if the home is sold.
Does my project require permits or qualify for a Toronto subsidy?
Toronto generally does not require a building permit for basic basement waterproofing repairs or sump pump installation. A permit is required for backwater valves, underpinning, and certain structural or drainage work. Eligible homeowners may receive up to $6,650 across approved flood-protection measures. Funding does not apply to every interior or exterior waterproofing project.
What maintenance do sump pumps and drainage systems need?
Test your sump pump several times a year and before periods of heavy rain. Keep the pit, float switch, intake, and discharge line clear, and check battery backup power regularly. Interior drainage systems need little routine care, but accessible outlets and cleanouts should remain unobstructed. Arrange service if the pump runs constantly, makes unusual noises, or stops removing water.
What should I do if my basement is leaking now?
Move belongings away from the water and avoid wet areas near electrical outlets, panels, or appliances. If the leak comes from plumbing and the shutoff is safely accessible, turn off the water supply. Photograph the damage, remove standing water when safe, and arrange an inspection promptly. Finding the entry point is essential before choosing a repair.
What are your Service Areas?
Serving Toronto and Surrounding GTA Communities
Aquamaster proudly serves Toronto and the surrounding areas with expert basement waterproofing services. This includes emergency repairs, basement underpinning, and all our drainage system services. The heavy snow and rainfall in Southern Ontario leave basements more vulnerable to leaks, flooding, and foundation cracks. Our goal is to keep every Southern Ontario home from the damaging, time-consuming, and costly effects of water infiltration. Explore our full list of service locations here:
Region of Toronto Basement Waterproofing
Muskoka Region Basement Waterproofing
Halton Region Basement Waterproofing
York Region Basement Waterproofing
Niagara Region Basement Waterproofing
Durham Region Basement Waterproofing
Peel Region Basement Waterproofing
- Bolton Basement Waterproofing
- Mississauga Basement Waterproofing
Waterloo Region Basement Waterproofing
Simcoe County Basement Waterproofing
Others
