Reliable Basement Waterproofing Contractor in Toronto & Nearby

If your basement is wet, cracked, or smells musty – we can help

If your home is built on a basement or a crawlspace, there's a good chance you will experience water and moisture problems. The water that is naturally in the soil below will rise up into a crawlspace or seep through your basement foundation walls. The damp air will also spread up into the livable areas of the house. This humidity can lead to mold, structural damage, and health issues. To avoid these costly damages and problems, professional basement waterproofing is necessary. 

As a professional basement waterproofing company with 15+ years of experience, Clarke Basement Systems understands the best solutions for your leaky basement, high moisture, or flooding issues. Our employees are known for their superior craftsmanship and have been honored with awards like "Talk of the Town" for their excellent customer service. Call 1-844-225-6185 or click the button below to schedule a FREE basement waterproofing estimate or inspection! We proudly serve Toronto, Markham, Mississauga, & nearby Ontario

Why Ontario Homeowners Choose Our System:

  • Transferable lifetime dry basement warranty
  • Solutions for finished and unfinished basements
  • No destructive outside excavation
  • More than 32 patented products, all designed specifically for your basement
  • Free estimates on work needed

Customer Reviews

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Ben Wallis recognized our dilemma and addressed our issues...
By Deborah W.
Newmarket, ON
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Everyone was completely professional, helpful and friendly...
By Bianca R.
Brampton, ON
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The guys were honest, kept us informed at what they were...
By Jack C.
Bolto, ON
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Very pleased with your company will be calling you again...
By Matt
Bracebridge, ON
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Very happy with this company. It is SO hard these days to...
By Shellie T.
Whitby, ON
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Great company to deal with, very impressed with the whole...
By Cam L.
Seguin, ON
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By Rocco C.
Markham, ON
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I am secure in knowing that Clarke Basement Systems stands...
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Newmarket, ON
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Incredible, he gave us some great options and we went with...
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Alliston, ON
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Toronto, ON
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Signs That Basement Waterproofing is Needed:

Your damp or wet basement can cause more than just a headache; these issues can create bigger problems like mold, mildew, rot, structural damage, and a variety of health problems. If you’ve noticed any of the symptoms below, contact us today!

  • Wet or damp basement floor
  • Leaking basement walls
  • Pooling or standing water
  • Crystalline deposit on concrete surfaces
  • Musty odors
  • Condensation
  • Sump pump issues
  • Leaky basement windows

Our waterproofing solutions have been used over 200,000 times

Our complete basement waterproofing system includes all the solutions you need for a dry, comfortable, odor-free basement; no matter what’s causing your issues. We offer many solutions for your home, including sump pumps, weeping tile, and other basement drainage systems, dehumidifiers, crack repairs, vapor barriers, and more.

If you think you have a basement waterproofing problem, request a professional basement inspection today. We will send one of our certified basement waterproofing specialists to visit your home and conduct a thorough inspection of your home’s basement foundation.

We believe you deserve only the best. That’s why we install a patented proven system developed and tested by Basement Systems, Inc. – the leader in “All Things Basementy!” For your peace of mind, our basement waterproofing system comes with a Lifetime Warranty that is transferable when you sell your home. We have a team of extensively trained basement repair specialists in the Greater Toronto area who can work with you to find the best solution for your home’s basement.

Recent Testimonials

The architects were in the crawlspace and commented that "the crawlspace encapsulation was the best they had... Read Full Testimonial
Julie S.
Port Elgin, ON
...we are still very happy with our basement system and the we are VERY happy we have it installed before all... Read Full Testimonial
Kelly & Peter P.
Priceville, ON
Sharon H.
Allenford, ON
Bruce C.
North Kawartha, ON
Clarke Basements installed the basement system and TripleSafe sump pump into our home and now we feel... Read Full Testimonial
Wayne D.
Courtice, ON


Why is my basement flooding?

Basements are prone to flooding by design since they are typically built below ground level. Basements often flood during times of heavy rain or snowmelt, but flooding can happen even during dry weather. Aside from flooding in your neighborhood or a plumbing leak, there are several other sources of water in the basement, including surface water, groundwater, or sewer water backup. Surface water from overflowing gutters or sloped pavement or landscaping can pool next to the foundation and seep or leak into the basement. When the groundwater level rises above the level of the basement floor, hydrostatic pressure pushes water through cracks in the foundation. An overwhelmed sewer system or clogged sewer line can cause a backup of water in the basement.

When your basement floods, call a restoration contractor who can help with cleanup, then have your home inspected by a basement waterproofing professional. We can provide a no-charge evaluation and design a custom waterproofing solution to prevent future water damage.

Request a free estimate

Do I need basement waterproofing?

Basement waterproofing involves a range of techniques and waterproofing products used to prevent water leaks or seepage and reduce the risk of a flooded basement. Water in your basement can damage walls, floors, carpeting, and furniture and lead to mold growth. A wet basement can also lead to ruined irreplaceable items, including photos, antiques, and family heirlooms.

If the water in your basement is a recurring problem, have your home checked to determine the source of the water in your basement. We will conduct a no-charge thorough inspection of your home and design a custom solution for your specific basement water problem.

Can I waterproof my basement myself?

Depends. The source of your wet basement problem will determine the best approach to waterproof your basement. Sometimes, the solution to a wet basement is as simple as keeping water away from the foundation with high-quality gutters and proper yard grading. Many homeowners try DIY, off-the-shelf solutions for a quick, temporary fix. But if entire walls are wet, water is coming up through the floor, or there's standing water in the basement during heavy rain, it might be time for a long-term, permanent solution, including a heavy-duty sump pump and interior drainage system installed by a waterproofing contractor.

What kinds of basement waterproofing services do you offer?

We offer a range of basement waterproofing services to prevent potential water leakage and remove water that enters the basement.

Clarke Basement Systems provides no-charge inspections to check for leaky basement windows or window wells, wall or floor cracks, bowing walls, wet or damp basement walls, exterior drainage issues, and equipment issues, including sump pump failures or drain clogs. Depending on your unique situation, we can design a customized solution for your wet basement problem. Basement waterproofing typically involves an interior drainage system, sump pump installation, and foundation crack repair. We also use techniques to prevent water from entering the house. To prevent mold and mildew caused by excess moisture and humidity, we can install a high-performance, self-draining basement dehumidifier.

Our long-term basement waterproofing repairs are designed to keep your basement dry and the air healthy all the time.

How do you waterproof a finished basement?

Waterproofing a finished basement can require pulling up carpeting and removing drywall, if there's damage from water and moisture.

To reduce basement humidity and prevent water from entering the basement, you should take steps to keep water away from the foundation, including installing gutters and sloping the soil around the foundation away from the house. To reduce musty basement smells and prevent mold and mildew growth, we can install a large-capacity basement dehumidifier to remove excess moisture throughout the year. For leaks and standing water, have your basement inspected and consider having an interior drainage system installed to direct water in the basement to a sump pump that will pump the water out. For damp basement walls, our CleanSpace vapor barrier is a quick, long-term solution to keep the walls dry and prevent mold and mildew problems.

If you're planning to upgrade your finished basement, we offer a complete basement finishing system that includes wall, floor, and ceiling materials that are mold and mildew resistant.

Request a free estimate from your local basement expert

Clarke Basement Systems fixes leaky basements in Ontario, in areas like Toronto, York, Oshawa, Vaughan, Brampton, Barrie, Peterborough, Newmarket, Richmond Hill, and neighboring towns and cities. Contact us today for a free wet basement repair estimate.

Other companies might try to sell you inferior basement waterproofing solutions. Our products have been developed, patented, and perfected by Basement Systems®, Inc. -- the world's largest network of basement waterproofing contractors.

Exterior Excavation

Heavy equipment is brought in to dig out the entire perimeter of the basement. New drain lines are installed, and sometimes a waterproof coating is applied to foundation walls. This waterproofing strategy is expensive and often damages lawn and garden areas. Exterior drains are prone to clogging with silt and roots over time.

Interior Subfloor Drain

This drain line is installed underneath the basement floor, just inside the foundation walls. The hidden drainage system brings water to a sump pit, where a sump pump automatically pumps it outside. Also known as a French Drain, this system is not prone to clogging; it’s reliable and easy to service.

Interior Baseboard System

A hollow plastic baseboard is installed along the base of basement walls to form a drainage channel that directs water to a sump pump system. A baseboard-type drainage system is sometimes recommended when the basement slab is too thin to accommodate a French Drain.

Negative-side Sealant

This waterproofing technique involves "painting" basement walls and floors with a waterproof, cement-based coating that's supposed to seal out moisture. Even when applied correctly, this thin membrane usually fails in response to prolonged hydrostatic pressure from outside the foundation.

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Proudly Serving Greater Toronto including - Mississauga, Markham, Toronto & nearby

We serve the following areas

Our Locations:

Clarke Basement Systems
12045 McCowan Rd
Stouffville, ON L4A 4C3

Clarke Basement Systems
7250 Keele St Store #209
Vaughan, ON L4k 1Z8
Service Area
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