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Products & Services

Mold Services
Dust Mites Control
Mold Spores
Mold Prevention
Dry Rot & Brown Rot

Basement Repair Services & Products
WaterGuard Interior System
DryTrak Drainage Channel
TrenchDrain Drain Grate
IceGuard Discharge Line
FlexiSpan Wall Crack Repair
Polyurethane Crack Sealing
WellDuct Window Drainage
BrightWall Waterproof Panels
ThermalDry Wall Barrier
Basement to Beautiful Pre-Finishing Wall Insulation Panels
Drain Tile Installation
SuperSump Pump System
TripleSafe Pumping System
UltraSump Battery Back Up
SaniDry Dehumidifier

Crawl Space Repair Services & Products
CleanSpace Encapsulation Vapour Barriers and Liners
Turtl Access Hatch
EverLast Crawl Space Doors
SaniDry CSB Dehumidifier
SmartDrain Water Drainage
SilverGlo Wall Insulation
TerraBlock Floor Insulation
SmartSump Sump Pump
WallCap Block Wall Sealer
SmartVent Flood Vents

Foundation Repair Services & Products
Push Pier Underpinning for Settlement, Foundation Leveling, Sinking Foundation Repair
Structural Repair
Geo-Lock Wall Anchors
Geo-Lock Helical Anchors
PowerBrace Bowed Wall Repair
CarbonArmor Fiber Wall Repair
SmartJack Crawl Space Support
Slab Pier Repair
PolyLevel Concrete Lifting & Leveling
ShotCrete Wall Restoration

Before and After Pictures from Markham
Water and Mold in a Finished Basement in Markham, ON

Water and Mold in a Finished Basement in Markham, ON

Before After
Water and Mold in a Finished Basement in Markham, ON Water and Mold in a Finished Basement in Markham, ON

This 1970's home located in central Markham, ON had a fully finished basement, the old block foundation had some nasty issues that were lurking behind the drywall. It started off with the customer noticing a small patch of damp drywall, a few days later a small puddle appeared on the floor along the same wall but in a different location it was then they realized they needed to call in the professionals. The homeowners were puzzled, never having a leak in the basement before and not knowing what was happening. We sent out our local inspector to take a look and see if he could help to source the leak and provide a solution. The homeowners decided to start removing drywall in the area that was wet to prevent mold growth. Our inspector showed up and the bottom of the drywall was already removed, he quickly noticed that the bottom few rows of block were very wet, and some even had mold growth already. With a solution in mind he explained to the homeowner what was happening, why it was happening and what we could do to fix this issue. It didn't take long for the work to get started and when it did it was a matter of hours before the issue was dealt with. We went in removed the bottom few feet of drywall and studding, installed the WaterGuard interior trench drainage along the footings and put up ThermalDry moisture barrier wall membrane to catch and control the water. Now that the water issue is dealt with the homeowner has re-finished the bottom few feet of drywall and is now back to being the recreation room for the family to enjoy.

Complete Structural Foundation Repair to Home in Markham, ON

Complete Structural Foundation Repair to Home in Markham, ON

Before After
Complete Structural Foundation Repair to Home in Markham, ON Complete Structural Foundation Repair to Home in Markham, ON

This customers home was built over a stream, and over the years the house had began to sink. The basement floor had sunk 7 inches before we were called. Using our engineers and patented products, we were able to completely rebuild the foundation of this customers home. 

Back Patio and Side Walkway Lift in Markham, ON

Back Patio and Side Walkway Lift in Markham, ON

Before After
Back Patio and Side Walkway Lift in Markham, ON Back Patio and Side Walkway Lift in Markham, ON

After heavy rain a home in Markham, Ontario had water pooling on the concrete patio at the back of the house. There was also water flowing towards the foundation on the walkway at the side of the house. The homeowner was worried that the water would begin to make its way into the basement causing many other issues.
The Canadian Concrete Leveling team was able to lift all affected concrete by using our PolyLevel injection. There is no longer a 4 inch drop in the concrete and water will now flow away from the foundation. The customer is left with a safe, usable space and no longer has to worry about water pooling around their home and causing damage.

Company Awards
Clarke Basement Systems has been awarded the HomeStars Best of 2016 award which we are very proud of.... [Read more]
The Community of Markham has chosen our business as the winner of the annual Markham Economist & Sun Reader’s Choice... [Read more]
Ratings are calculated based on consumer-review websites and blogs, social networks, business rating services and other award information to determine... [Read more]
More Awards

Your Local Markham Basement Waterproofing & Foundation Repair Contractor

Happy Customers Surrounding Markham, ON
Work Requests

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Reviews From Markham
Testimonials From Markham
After being satisfied with previous waterproofing services performed by Clarke Basement Systems, Jim from Markham, Ontario decided to call us when he...
Testimonial by Jim from Markham, ON
It was a very good experience. Starting from the estimate - the estimator came in and was very professional. He gave me a good estimate and an approximate...
Testimonial by Nadeen from Markham, ON
A great job with the installation
Testimonial by S. M. from Markham, ON

Professional Basement Waterproofing and Sump Pumps in Markham, ON

At Clarke Basement Systems we put customer service first and are proud to serve our area. Our team of trained technicians use only high quality materials from the best manufacturers in the business to ensure that you get only the best results. We want to find the solution that will work best for you!

If you have problems with mold or water damage in your basement, then it's time to get it checked by professionals like the folks at Clarke Basement Systems. Some of the major warning signs of a waterproofing problem are:

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

Our excellent products like vapor barriers, dehumidifiers, and drainage systems will keep your basement dry and healthy. Need help removing water and keeping the area dry? Then our TripleSafe sump pump is the thing for you! With a primary pump, a secondary pump, and a third, battery operated backup pump, you can always have the peace of mind you deserve knowing that you home is well-protected. 

Expert Foundation Repairs and Concrete Leveling in Markham, ON

Animation of wall anchors in Markham, ON

For problems with bowing, leaning walls or sinking, settling foundations, Clarke Basement Systems is your local expert for the job! We offer a variety of excellent products like wall anchors and I-Beam wall braces to correct bowing, leaning walls. Additionally, we offer foundation piers, helical piers, and slab piers to correct your uneven, sloped, or sinking floors. Other signs of a foundation problem are: 

  • Uneven or sloping floors
  • Cracks in the interior or exterior wall
  • Sagging floors over a crawl sapce
  • Hard to open windows and doors
  • Tilting chimneys
  • Street creep

Need a solution to uneven concrete in your home or on sidewalks or patios? Then look no further than the PolyLevel Concrete Lifting System from Clarke Basement Systems. The PolyLevel gets injected under the concrete slab which raises it to the appropriate height so that it's even with the rest of the concrete around it, eliminating it as a safety hazard. 

Dependable Crawl Space and Mold Repairs in Markham, ON

Crawl space with vapor barrier installed in Markham, ON

One of the most neglected and unassuming areas of the home is the crawl space. When left unchecked, a crawl space can become a breeding ground for mold, mildew, and even small animals and other pests, not to mention cause other problems for your home like affecting air quality or foundations. By installing vapor barriers, thermal insulation and dehumidifiers, you can turn you dirty, unsafe crawl space into a healthy, energy-efficient space. 

Signs of a crawl space problem:

  • Sagging floors
  • Condensation
  • Mold
  • Wood rot
  • Foundation cracks

Having problems with musty smells and mold in your basement or crawl space? We have the time-tested products and methods to improve the air quality of your home as well as find solutions for problems such as beams sagging due to wood rot. 

Clarke Basement Systems has the tools and expertise to get your project done the right way the first time. Our friendly, knowledgeable staff and certified technicians use only high quality products and are ready to help you find a solution that will work for you and your home. Call us today for a free estimate!


Get a Free Estimate!

Case Studies From Markham
A home in Markham, Ontario, had a patterned concrete pool deck that had been sinking down a little more each year. This was happening for several...
A home in Udora, Ontario had water coming in from the perimeter of the basement. This was caused by exterior foundation waterproofing that had...
After heavy rains, this house in Markham, Ontario had water pooling on the concrete patio at the back of the house. There was also water flowing...
Job Stories From Markham, ON
Constant Water Leaks Repaired in Markham, ON Basement

After months of constant leaking in his basement, Markham, ON homeowner Rey C. decided enough was enough and began looking for waterproofing companies to service his basement.  Remembering a company from a home show he visited this spring, Rey decided to contact them for an estimate.


Rey contacted the professionals at Clarke Basement Systems and soon after, Clarke sent out Ron Monk to meet with Rey at his home and discuss solutions.  After evaluating the basement and the wall cracks, Ron discussed with Rey that the best course of action would be to install FlexiSpan.  Ron explained to Rey that FlexiSpan was a highly recommended wall sealant.  FlexiSpan is preferred over traditional sealants such as hydraulic cement because of its properties to not dry up or crack over time.  Additionally, FlexiSpan is designed to stretch and move with the naturally shifting motions of the walls to ensure the most protection out of the product.  After explaining the process that would be done to install the product, Ron called in Fitz Wilks, a primary foreman for Clarke Basement Systems to install the product.


Fitz completed the installation process over a day’s time and now Rey’s basement is safer than ever!  Thanks to the professionals at Clarke Basement Systems, FlexiSpan will effectively waterproof the home for years and years to come!

Basement Water Intrusion Remedied in Markham, ON

After a particularly heavy storm, Markham, ON homeowners Douglas and Vanla M. found that water was coming into their basement through an unknown source.  Curious to find out where it was coming from, the couple decided to research waterproofing companies that serviced their area.  They found Clarke Basement Systems and they contacted them that same day.


A couple of days after contacting them, Clarke sent out waterproofing specialist Ron Monk to evaluate the couple’s basement.  What Ron found as the unknown source was slight hairline cracks that were letting in moisture.  Although not a huge problem at the moment, if left unattended those cracks could grow and cause extensive damage to the walls and basement.  Luckily for the couple, Ron had an ideal solution for their situation.  Ron proposed installing Flexispan along the hairline cracks.  Flexispan is a polyurethane polymer which seals the cracks and effectively protects them from further intrusion of moisture and other outside elements.  Unlike traditional applications such as hydraulic cement or epoxies, Flexispan will not dry up or crack over time.  Additionally it is designed to bend, move and stretch with a naturally shifting foundation wall.  To install Flexispan, Ron called in primary foreman Fitz Wilks and his crew.


After a quick and easy one day installation process, Douglas and Vanla’s basement was no longer troubled by the hairline cracks that cursed it. Now they can look to the future knowing their basement troubles are a thing of the past.

Work Requests From Markham, ON
Avondale Cres in Markham
We have a wet basement and would like a quote to repair the cracks to prevent further leaks.
Cornwall Drive in Markham
Whenheavy rain is falling some water is leaking through one side of the concrete going to the basement (not lot of water). I appreciate a free estimate. Thanks
Squire Baker's Lane in Markham
Foundation and crawl space leak....
Foxglove Court in Markham
Estimate on inside wall foundation crack repair - and or outside foundation repair.
Upper Ridge Crt., in Markham
My cold room which is under my front steps is leaking.
Serving the following Markham, ON postal codes
L3P 0A1, L3P 0A2, L3P 0A3, L3P 0A5, L3P 0A6, L3P 0A7, L3P 0A8, L3P 0A9, L3P 0B1, L3P 0B2, L3P 0B3, L3P 0B4, L3P 0B5, L3P 0B6, L3P 0B7, L3P 0B8, L3P 0B9, L3P 0C1, L3P 0C2, L3P 0C3, L3P 0C4, L3P 0C5, L3P 0C6, L3P 0C7, L3P 0C8, L3P 0C9, L3P 0E1, L3P 0E2, L3P 0E3, L3P 0E4, L3P 0E5, L3P 0E6, L3P 0E7, L3P 0E8, L3P 0E9, L3P 0G1, L3P 0G2, L3P 0G3, L3P 0G4, L3P 0G5, L3P 0G6, L3P 0G7, L3P 0G8, L3P 0G9, L3P 0H1, L3P 0H2, L3P 0H3, L3P 0H4, L3P 0H5, L3P 0H6, L3P 0H7, L3P 0H8, L3P 0H9, L3P 0J1, L3P 0J2, L3P 0J3, L3P 0J4, L3P 0J5, L3P 0J6, L3P 0J7, L3P 0J8, L3P 0J9, L3P 0K1, L3P 0K2, L3P 0K3, L3P 0K4, L3P 0K5, L3P 0K6, L3P 0K7, L3P 0K8, L3P 0K9, L3P 0L1, L3P 0L2, L3P 0L3, L3P 0L4, L3P 0L5, L3P 0L6, L3P 0L7, L3P 0L8, L3P 0L9, L3P 0M1, L3P 0M2, L3P 0M3, L3P 0M4, L3P 0M5, L3P 0M6, L3P 0M7, L3P 0M8, L3P 0M9, L3P 0N1, L3P 0N3, L3P 0N4, L3P 0N5, L3P 0N6, L3P 1A1, L3P 1A2, L3P 1A3, L3P 1A4, L3P 1A5, L3P 1A6, L3P 1A7, L3P 1A8, L3P 1A9, L3P 1B1, L3P 1B2, L3P 1B3, L3P 1B4, L3P 1B6, L3P 1B7, L3P 1B8, L3P 1B9, L3P 1C1, L3P 1C2, L3P 1C3

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