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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
ShotCrete Wall Restoration

Concrete Repair
PolyLevel Concrete Lifting & Leveling
NexusPro Cracked Concrete Repair
SealantPro Concrete Sealant
Interior Slab Repair
Concrete Sidewalk Repair
Concrete Pool Deck Repair
Concrete Driveway Repair

Egress Windows

Before and After Pictures from Whitby
CleanSpace® Installation in Whitby, ON

CleanSpace® Installation in Whitby, ON

Before After
CleanSpace® Installation in Whitby, ON CleanSpace® Installation in Whitby, ON

A beautiful waterproofing job using our patented CleanSpace® Vapour Barrier completed in Whitby, ON, leaves the homeowner ecstatic! 

TripleSafe™ Saves The Day in Whitby, ON

TripleSafe™ Saves The Day in Whitby, ON

Before After
TripleSafe™ Saves The Day in Whitby, ON TripleSafe™ Saves The Day in Whitby, ON

The previously installed sump pump system was unreliable and failed one Whitby, ON homeowner, so we replaced it with our extremely reliable TripleSafe™ Complete Sump Pump System.

Company Awards
Best of 2019 Homestars Award
Hailed as HomeStars' highest honour, the Best of Awards, presented by DEWALT, Canadian Contractor and RenoRun, recognizes the most trusted... [Read more]
HomeStars Best of 2016 Award
Clarke Basement Systems has been awarded the HomeStars Best of 2016 award which we are very proud of.... [Read more]
Readers Choice Award Winner 2015
The Community of Markham has chosen our business as the winner of the annual Markham Economist & Sun Reader’s Choice... [Read more]
More Awards

Dependable Basement Waterproofing & Foundation Repair Contractor Serving Whitby, ON

We were devastated to find 3 inches of water in our newly renovated basement.  I would recommend Clarke Basement Systems without...
Happy Customers Surrounding Whitby, ON
Work Requests

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Reviews From Whitby
Testimonials From Whitby
My experience with Clark Basement Systems was fantastic. Chris answered all of our questions in a patient and easy to understand manner.
Testimonial by George E. from Whitby, ON
Needless to say we are relieved that the source wasn't related to the Clarke's installation and through the whole discovery process both Rob and Steve were...
Testimonial by Gunar Z. from Whitby, ON
Steve made me feel at ease right away. It was an easy decision to go with CBS!
Testimonial by Nancy S. from Whitby, ON

Basement Waterproofing Experts Serving Whitby, ON

Water in the basement or crawl space leads to mold, rot, musty odors and structural issues. It also leads to a reoccurring headache for you. Luckily, Clarke Basement Systems has a team of trained experts that are available to permanently fix the problem.

We will properly install a hidden drainage system in your Whitby basement and completely encapsulate your crawl space with CleanSpace vapor barrier. We are here to solve the problem for you.

Why Choose Us?
  • Lifetime Warranty on all Perimeter Waterproofing Systems
  • 25-year Warranty on Crawl Space Encapsulation Systems
  • Sump Pump Installation, Repair & Replacement
  • Basement, Crawl Space & Spray Foam Insulation
  • Crawl Space & Basement Dehumidifiers
  • Hundreds of Satisfied Customers

Foundation Crack Repair Contractor

Foundation repair problems destroy your Whitby home’s value and can be dangerous. Our in-house team of structural and geo-technical engineers are here to help. We design and install the right solution and usually have the project finished in less than a week. You will have peace of mind as we provide a 25-year written warranty against defects on our foundation products.

We Fix
  • Bowing Walls
  • Sagging Floors
  • Stair-Step Cracks
  • Tilting Chimneys  
  • Foundation Cracks
  • Garage Slabs   
We Use
  • Wall Anchors
  • Slab Piers
  • I-Beam Wall Braces
  • Helical Deck Piers
  • Sticking Windows
  • Underpinning


Crawl Space Vapor Barrier Encapsulation Experts

Crawl space encapsulation is the best way to eliminate musty odors, mold, moisture and mildew. Clarke Basement Systems has a team of dedicated crawl space encapsulation experts with decades of experience and warrantied products. Our patented crawl space vapor barriers provide a dependable moisture barrier that is guaranteed to last 25 years. Trust our crawl space encapsulation team to permanently fix your leaky or damp crawl space. Our crawl space encapsulation services are proven, dependable and warrantied. Call or click today to schedule your FREE crawl space encapsulation estimate!

Benefits of our Crawl Space Vapor Barriers:

  • Seal Out Cold Air, Humid Air & Moisture
  • Prevent Crawl Space Leaks
  • Improve Energy Efficiency
  • Durable Crawl Space Vapor Barrier Material with 25-year Warranty

Fast & Affordable Concrete Repair

The sunken and cracked concrete around your Whitby home is both an eyesore and a safety hazard. It is also likely to get worse with time, but we can fix it for you!

Our experts use PolyLevel, a superior polyurethane foam to provide reliable concrete lifting & leveling solutions. Small holes are drilled in the concrete and the expansion of the foam lifts & levels the concrete. The majority of contractors you will call use mudjacking instead of foam. Mudjacking is heavier, requires larger holes in the concrete and does not last as long as PolyLevel.

If your home has cracked concrete steps, pool decks, patios, or other slabs, then NexusPro is the right solution. NexusPro repairs concrete cracks and joints and is ultra-durable, so it will withstand UV rays, extreme weather, and more.

After utilizing our expert concrete repair solutions, consider the powerful concrete sealant, SealantPro. SealantPro further protects your concrete by bonding with it to guard against oil, gasoline, liquids, and other debris. In just one coat, SealantPro extends the life of your concrete by 3 to 5 times overall. 

Call us today to learn more about our proven concrete leveling, cracked concrete repair, and concrete sealing techniques.

We Fix
  • Cracked Driveways
  • Uneven Patios
  • Sinking Sidewalks      

  • Uneven Concrete
  • Sunken Pool Decks
  • Highway & Commercial Issues
Case Studies From Whitby
The homeowner noticed stair step cracks in brick veneer on the exterior and a space between the foundation wall and actual bricks. The floor in the...
On a brand new construction project it was found that the soil bearing the weight of the house was unstable, causing the front elevation of the house...
During a visit to a potential new home our customer noticed that the basement of the home had puddles of water in various locations throughout the...
Job Stories From Whitby, ON
Waterproofing a Whitby, ON Basement and Crawlspace

Andrew H. wanted to finish his basement but noticed that musty odours were continually coming from his basement and crawl space. He began to worry about potential flooding and his Sump Pump system failing. Andrew knew he had to address the odours and his flooding concerns before he could move forward with renovations, so he contacted Clarke Basement Systems for the best solution.

The solution for this musty basement problem included the use of our patented TripleSafe™ Complete Sump Pump System, SuperSump® Premier Sump Pump System and AprilAire Model 1850 Moistureloc Dehumidifier. These systems worked together symbiotically to control humidity levels, condition the air as well as provide protection against unwanted water in the basement and crawl space.

Now Andrew can enjoy his home to the full extent without worrying about musty odours or sump pump failure. Clarke Basement Systems is pleased to have been able to assist this Whitby, ON homeowner with all of his waterproofing needs.

Waterproofing a Whitby, ON Basement and Crawlspace - Photo 1Waterproofing a Whitby, ON Basement and Crawlspace - Photo 2Waterproofing a Whitby, ON Basement and Crawlspace - Photo 3
Damp and Musty Basement Transformation in Whitby, ON

Loretta and Eric G. noticed the presence of a leak in their basement that caused the carpet and drywall to go mouldy. This was an issue as their youngest son was living in the basement, and the condition of the basement was affecting his quality of air and living. Loretta and Eric G. decided to contact Clarke Basement Systems for the best possible solution.

Our solution included the use of our patented CleanSpace® Basement Wall Vapor Barrier, WaterGuard® Below-Floor Drain and TripleSafe™ Complete Sump Pump System. These systems worked together to pump the water away from the house, as well as to remove the dampness and smell while reducing humidity.

Now Loretta, Eric and their son can enjoy their basement worry-free. Clarke Basement Systems is pleased to have been able to assist these Whitby, ON homeowners with transforming a wet, musty basement into a dry, healthy space!

Damp and Musty Basement Transformation in Whitby, ON - Photo 1
Unreliable Sump System Replaced for THE BEST Sump System Available in Whitby, ON

Stephen S. was sick and tired of coming home to find his Whitby, ON, home’s basement completely submerged in water. Not only was it ruining all his stored items, but damaging the structural integrity of his home! He knew that he had to resolve this issue ASAP and couldn’t put it on the back burner any longer. Stephen researched the top Waterproofing companies in the Durham region  and decided to hire Clarke Basement Systems.


Steve Matthews, System Design Specialist, isolated the water seepage issue in Stephen’s home. He found that there was MASSIVE hydrostatic pressure against the foundation of the home, resulting in water driving into the basement. Normally, a sump pump would be able to keep up with all the water entering the home, but this was not the case. Due to the amount of water entering the basement, the generic home builder sump system could not keep up. Steve Matthews recommended that the customer replace his sump system with the TripleSafe™ Sump Pump System. 

The TripleSafe™ System keeps your basement dry with triple the protection. Most sump pumps fail because of either a failed pump, a pump that can't handle high volumes of water or power failure. The TripleSafe assures protection from all three-sump pump problems. Dave Jackson, our job foreman, installed the new sump system and noticed the hydrostatic pressure disappear within minutes! He also rerouted the water discharge line to an area farther away from the house, so that water wouldn’t continue to come back in.


There’s no doubt that Stephen can now enjoy a dry, healthy basement, and have peace of mind of knowing it won’t flood again.


Unreliable Sump System Replaced for THE BEST Sump System Available in Whitby, ON - Photo 1
Water Seepage No More! Whitby, ON

Brittany O. had water leaking into her Whitby home’s basement every spring thaw. The result was a damp, musty basement with damage to all her items stored down there. Brittany described the situation as “scary” because it was not only compromising the structural integrity of her home but was creating an unhealthy environment for her. She knew that the problem needed to be resolved properly, so she called Clarke Basement Systems.


Chris Luke, one of our System Design Specialists, put a foolproof plan together to resolve the water issue. Dave Jackson, the Foreman on the job, followed Chris’ plan and installed Cleanspace® walling to catch all the water seeping in through the foundation. The water flows to our patented WaterGuard® Below-Floor Drain System where the water gets redirected to the SuperSump® Premier Sump Pump System. All the water that was coming into the basement gets pumped out and away from the house, and the beautiful white Cleanspace® walls brightened up the basement too!


Since the job is complete, Brittany no longer considers her basement scary. She can now store her belongings down there without any fear of water damage! Her basement is now a healthy space for her and her family.

Water Seepage No More! Whitby, ON - Photo 1Water Seepage No More! Whitby, ON - Photo 2Water Seepage No More! Whitby, ON - Photo 3Water Seepage No More! Whitby, ON - Photo 4
Concrete Island Causing a Serious Hazard, Whitby, ON

A parking lot in Whitby, Ontario, had a concrete island that had sunken substantially, inside the curb stones. This presented many potential trip hazards for visitors to the Centre, which the Engineering Technician from the Town of Whitby wanted us to alleviate.    

The customer called us regarding the area next to the electric car charging station in the Iroquois Center parking lot. Our team came and in injected PolyLevel foam. This lifted the concrete back to its original position and allowed the concrete to be stable for the future. The trip hazard is no longer there and the technician is happy know they don't have to worry about it anymore.


Concrete Island Causing a Serious Hazard, Whitby, ON - Photo 1
Work Requests From Whitby, ON
Vicinity of Charles St in Whitby
Hello, My name is Stacey and I am the president of the condo corporation for our townhouse complex of 12 units at 1605 Charles St in Whitby, ON. One of our residents at Unit 4 has noted water pooling on the floor of their basement, coming from an area near the exterior south wall of their home, in a crawlspace area under their front entryway. Myself and another member of the board investigated and took some photos, also noting that the concrete brick under the downspout near the area outside the home has sunk down. We are unsure if it is a foundation issue, or if water is coming in some other way such as an issue with the weeping tile, or something else, but we would like to find a solution for the homeowner. They first noticed the water coming in after the storm we had on the weekend, and also after we had the snowstorm that turned into rain a couple weeks ago. All the units have sump pumps, and the one for Unit 4 is still functioning, but is far away from where the water is coming in. However, it looks like water has been an issue in that spot of the basement in the past as well because there is some mold growing on a wall in the space. It looks like water may have been an issue in the past because of staining on the roof tiles in that area, which is also where the main water shut off valve is, so the mold growth may have been due to that, but the homeowner didn't notice or report anything to the board when they moved in last summer. We would like to have someone come out and take a look, and provide an estimate for the work that they think will address the problem. Please let me know some times that would work this week or next week, or even Saturday morning, to come and take a look; I will need to make arrangements with the homeowner to gain access to the home. Thank you and talk to you soon, ~Stacey Kerr President, DCC109
Vicinity of KNOX CRESCENT in Whitby
3294 sq ft 2 Story Vinyl Sided detached tribute home. circa 2000 Ground water present under basement floor. Found during drain installation for basement bathroom. 2nd story Balcony at front of (SE corner) house has settled approx 2 in.
Vicinity of Regency Crescent in Whitby
Looking for a quote for waterproofing our house. It's about 1500 square feet.. Is there a difference if the digging is done already?
Vicinity of Murkar. Crescent in Whitby
Can I please have a quote on crack injection there is a leak in my basement.
Vicinity of Schilling Court in Whitby
I noticed some of water pooling in my basement and I've located where it's coming from. I was hoping to find out the cost of filling the crack. It's an unfinished basement. Thanks
Vicinity of Fairview Drive in Whitby
I was hoping to have someone come out to take a look at my basement. There seems to be some water coming up through the concrete floor due to hydrostatic pressure under my house. There is already an old sump pump pit and an old sump pump. I was hoping someone could come out and take a look and provide some advice on the best solution for protecting the basement.
Vicinity of John St. W. in Whitby
Replacing clay pipe in the basement and noticed a void under the rest of the concrete slab and want to get it addressed before finishing the basement.
Vicinity of Golders Green Court in Whitby
I need a quote on fixing 3 cracks in our unfinished basement
Vicinity of Splendor Drive in Whitby
Leak in the basement.
Vicinity of Guthrie in Whitby
I put an offer on a house for sale but it has structural damage on the exterior basement wall because of a walk out exit from the basement.. I need to know how much it costs to fix it.. if it's worth hanging on to..
Vicinity of Dublin Street in Whitby
I have water coming into my house for the second time this year after rainfalls in my crawlspace/basement
Vicinity of Stokely Cres in Whitby
Water is coming into the basement. I had the rear of the house repaired last year and now it seems the front of the house is also in need of a repair. I messaged Steve but not sure he is still with your company. Thanks.
Vicinity of Holsted Rd in Whitby
Have an aprox 3ft baseboard in teh basement that is showing water damage and some mold. Need to get it repaired.
Vicinity of King Street in Whitby
Hello, We have some water damage and mold in our finished basement laundry room. Trying to identify the source and what is required to fix the issue ahead of renovating the space.
Vicinity of Ian Fleming Crescent in Whitby
1. The pink wall insulation in the basement has absorbed water (coming through porous concrete wall). Because of this, there appear to be mold growth in the pink insulation (in two places). 2. There are three minor wall cracks in the basement. Have not seen water coming through these cracks. But would like to have these cracks repaired. 3. Basement has musty smell. 4. In the cellar, there is a small crack on the concrete ceiling. Some water (enough to wet the concrete) comes in through this crack when it is raining. 4. Cellar has musty smell. Would like to obtain a free quote on what would be your recommendations to fix the above issues and cost. Thanks.
Vicinity of Lafayette Boulevard in Whitby
Water found in furnace room. Can not locate source. I have also found Mold on drywall in area. Looking for a quote.
Vicinity of Splendor Drive in Whitby
Small damp spot where the slab floor and poured concrete wall meet in basement.
Vicinity of WatfordStreet in Whitby
Have a leak a tt the floor cove joint could someone contact please
Vicinity of Hialeah Crescent in Whitby
Vicinity of Baldwin St N in Whitby
Water entering from corner of cold cellar
Serving the following Whitby, ON postal codes
L1M 0A1, L1M 0A2, L1M 0A3, L1M 0A4, L1M 0A5, L1M 0A6, L1M 0A7, L1M 0A8, L1M 0A9, L1M 0B1, L1M 0B2, L1M 0B3, L1M 0B5, L1M 0B6, L1M 0B7, L1M 0B8, L1M 0B9, L1M 0C1, L1M 0C2, L1M 0C4, L1M 0C5, L1M 0C6, L1M 0C7, L1M 0C8, L1M 0C9, L1M 0E1, L1M 0E2, L1M 0E3, L1M 0E4, L1M 0E5, L1M 0E6, L1M 0E7, L1M 0E8, L1M 0E9, L1M 0G1, L1M 0G2, L1M 0G3, L1M 0G4, L1M 0G5, L1M 0G6, L1M 0G7, L1M 0G8, L1M 0G9, L1M 0H1, L1M 0H2, L1M 0H3, L1M 0H4, L1M 0H5, L1M 0H6, L1M 0H7, L1M 0H8, L1M 0H9, L1M 0J1, L1M 0J2, L1M 0J7, L1M 0J8, L1M 0J9, L1M 0K1, L1M 0K2, L1M 0K3, L1M 0K4, L1M 0K5, L1M 0K6, L1M 0K7, L1M 0K8, L1M 0K9, L1M 0L1, L1M 0L2, L1M 0L3, L1M 0L4, L1M 0L5, L1M 1A1, L1M 1A2, L1M 1A3, L1M 1A4, L1M 1A5, L1M 1A6, L1M 1A7, L1M 1A8, L1M 1A9, L1M 1B1, L1M 1B2, L1M 1B3, L1M 1B4, L1M 1B5, L1M 1B7, L1M 1B8, L1M 1B9, L1M 1C1, L1M 1C2, L1M 1C3, L1M 1C4, L1M 1C5, L1M 1C6, L1M 1C7, L1M 1C8, L1M 1C9, L1M 1E1, L1M 1E2, L1M 1E3, L1M 1E4, L1M 1E5, L1M 1E6, L1M 1E7, L1M 1E8, L1M 1E9, L1M 1G1, L1M 1G2, L1M 1G3, L1M 1G4, L1M 1G5, L1M 1G6, L1M 1G7, L1M 1G8

our service area