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

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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

Before and After Pictures from Whitby
Water Seepage Soaks Belongings in Whitby, Ontario

Water Seepage Soaks Belongings in Whitby, Ontario

Before After
Water Seepage Soaks Belongings in Whitby, Ontario Water Seepage Soaks Belongings in Whitby, Ontario

There’s a lot we put up with at our homes. Creaky floorboards, a tap that doesn’t work quite right, or a flickering porch light. These little things usually don’t cause enough of a problem to solicit a fix, and they add a quirky charm to a house. What we can’t put up with is a leak in the basement.

A customer in Whitby, Ontario, was having a water problem in his basement. He had a previously installed sump pump, but unfortunately, this new leak was in an entirely different area. Frustrated and tired of mopping up water, the customer reached out to Clarke Basement Systems. 

System Design Specialist Ben Wallis met with the customer at his home. Ben was able to put the customer’s worries at ease by offering a simple solution for his water seepage issue.

Foreman Lucio Flores started by removing damaged drywall in the basement before excavating a section of the perimeter. The excavated area is used to lay down our WaterGuard® Drain System, which catches water coming from the floor joint and walls. Jose installed ThermalDry® to encapsulate the walls and funnel any seeping water down to the drain before pouring new concrete over the drain. Lastly, an additional piece of WaterGuard® was installed to bring the water to the sump pump.

The customer is very satisfied that their water problem is permanently fixed. For extra peace of mind, the customer called us back two years later to install a SuperSump® Battery Backup, which keeps their basement dry even in a power outage. A happy customer!

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! 

Foundation Crack Soaks Finished Basement in Whitby, Ontario

Foundation Crack Soaks Finished Basement in Whitby, Ontario

Before After
Foundation Crack Soaks Finished Basement in Whitby, Ontario Foundation Crack Soaks Finished Basement in Whitby, Ontario

Damage at home happens. It could be as big as a broken furnace or as small as a broken window. Either way, it’s something we need to deal with, regardless of the issue.

A customer in Whitby, Ontario, had a foundation crack in their finished basement. Water was leaking through the crack onto their carpet, and they were concerned about damage from mould and mildew.

Tired of dealing with the crack, they reached out to Clarke Basement Systems for a solution. They met with System Design Specialist Chris Luke, who was able to put their worries at ease by showing them our FlexiSpan® Repair System.

Foreman Ali Fereidouni started the repair by injecting our sealant deep into the crack before patching the exterior. He also installed an in-floor drain to catch any additional seeping water. 

The customer is thrilled that their finished basement is protected. They can continue to use the space without having to worry about mould and mildew.

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]
More Awards

Complete Basement Waterproofing & Bowing Wall Repair Contractor in Whitby

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
No mess. Polite. Friendly.
Testimonial by Jeff H. from Whitby, ON
He was super professional and friendly
Testimonial by Katie B. from Whitby, ON
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

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
  • 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
  • Changes saved.
Case Studies From Whitby
The birth of a child is an exciting time for any parent. Expecting mothers and fathers go a little crazy getting their homes ready for their newborn,...
Churches are an important part of a community. They bring people together, give us a place to celebrate, and are sometimes a very historic place of...
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...
Job Stories From Whitby, ON
Leaking Basement Prevents Rental in Whitby, Ontario

There’s a wide variety of things we can use our homes for, but a popular thing to do if you have space is to rent out your basement. It’s a great way to utilize unused space, and the extra revenue can be enough to cover a mortgage payment.

A customer in Whitby, Ontario, was hoping to turn his basement into a rental space. His basement was finished, but unfortunately, there was water entering at one side of the basement. He needed the rental money but had to fix the issue before a tenant could move in. He reached out to Clarke Basement Systems, looking for a solution. 

System Design Specialist Ryan Hanlon inspected the home. He created a system to keep the basement dry and allow a tenant to move in. Foreman Dave Jackson installed our TripleSafe® Sump Pump and UltraSump® Battery Backup to keep water out of the basement year-round. WaterGuard® was installed around the perimeter of the basement, catching water and draining it to the sump pump. Since most basements in Ontario have high humidity, an Aprilaire® Dehumidifier was installed to keep the relative humidity down.

The customer is ecstatic that his basement is dry. He has a great secondary source of income now, and a tenant moved in within weeks of our team completing the work.

Water Seepage Floods Church Basement in Whitby, Ontario

Having an unusable space due to water is frustrating. But when work is completed to remedy the situation, only to have it fail, the frustration is amplified. For a church is Whitby, Ontario, this was the unfortunate hand they were dealt. Seeping water during rain and thaw season was rendering their large basement space useless. Water would often pool on the floor, creating an unsafe area for churchgoers and the Montessori school that rented out the space.

Before contacting Clarke Basement Systems, the church hired a different contractor to fix the problem. Unfortunately, that work was only done on the outside, a strategy that was doomed to fail. We sent over System Design Specialist Chris Luke to inspect the situation and develop a plan to waterproof the basement for good.

Foreman Jose Martinez installed multiple waterproofing products, giving the basement an entire waterproofing system. WaterGuard® French Drain was installed along the perimeter of the basement floor, offering proper drainage. Jose installed an UltraSump® sump pump to expel the water outside, away from the basement. To ensure the area was fully waterproofed, he also installed BrightWall®, encapsulating the entire space while providing a clean look. 

With the work complete and the basement finally dry, the church owner can breathe a sigh of relief. The large space is once again useable for the tenants and churchgoers, and with our warranty it will be for many years!

Water Seepage Floods Church Basement in Whitby, Ontario - Photo 1Water Seepage Floods Church Basement in Whitby, Ontario - Photo 2
Basement Renovations Put On Hold Due To Flooding in Whitby, ON

Homeowners in Whitby, ON, were devastated to find out that water was seeping in through their floor wall joint. They just began to renovate their basement when they found out they would need to fix this issue first. If they didn’t fix the water problem, all their expensive renovations would get ruined! They quickly decided they had to resolve the water seepage issues, so they called Clarke Basement Systems for their free estimate.

System Design Specialist, Chris Luke, inspected the home and recommended that our WaterGuard® Below-Floor French Drain System, SuperSump™ Sump Pump, and IceGuard® Sump Pump Discharge Line System would be the perfect products to completely waterproof the basement and prevent any future water damage from occurring.

When the plan was in place, Installation Foreman, Dave Jackson, and his crew got to work. They installed the patented Basement System products quickly and efficiently. Now the homeowners are relieved and never have to worry about the basement flooding, especially with the 25-year transferable warranty. They are thrilled with the results and are happy to get back to renovating their basement.


Basement Renovations Put On Hold Due To Flooding in Whitby, ON - Photo 1Basement Renovations Put On Hold Due To Flooding in Whitby, ON - Photo 2Basement Renovations Put On Hold Due To Flooding in Whitby, ON - Photo 3Basement Renovations Put On Hold Due To Flooding in Whitby, ON - Photo 4Basement Renovations Put On Hold Due To Flooding in Whitby, ON - Photo 5Basement Renovations Put On Hold Due To Flooding in Whitby, ON - Photo 6Basement Renovations Put On Hold Due To Flooding in Whitby, ON - Photo 7
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
Project Location: Whitby, ON
While we do not have water pouring in there is seepage/damp cement blocks.
Project Location: Whitby, ON
We have a flood in our basement and we are not sure what caused it.
Project Location: Whitby, ON
Noticed water on basement floor after a heavy rainfall - in storage room area
Project Location: Whitby, ON
Moisture accumulation in a corner of the basement. Please contact for consultation/estimate. Thanks
Project Location: Whitby, ON
Want to get a quote on how much it will cost to fix leaks in the basement.
Project Location: Whitby, ON
Crack on foundation and above 3 bricks have shifted half an inch.
Project Location: Whitby, ON
Would like a quote for crawl space for encapsulation. Pests and musty smell from crawl space.
Project Location: Whitby, ON
One side of our house is sinking. It is evident in the slope of the rooms. There might also be possible water drainage issues on this same side of the house. Would like to request a quote.
Project Location: Whitby, ON
My home is a 140 year old brick house in Whitby, on steeply sloped land. The footprint is very small (less than 500sq feet), and it has an unfinished basement with crawlspace. I'm concerned about signs of settling in the back corner of the house - uneven floors, foundation cracks, cracks in previous windows, etc. I'm looking to stabilize the house and level it before making other renovations. I have an experienced carpenter willing to level the home, but without a sturdy foundation, I'm concerned that the house will continue to shift. I'm looking to get quotes.
Project Location: Whitby, ON
Water is coming up through a crack in the floor. The crack looks like it was filled years ago, but the has re-opened. The entire crack is about 18" long, but water is coming up through a small section - about 3" long. I would like someone to come out to refill the crack. Thanks, Sean
Project Location: Whitby, ON
Have had leak a in the corner of my basement - foundation was repaired outside, roof was replaced and most recently downspout replaced. Each time leak stops for several years. My brother in law Jeff suggested I contact you about the problem to have it permanently repaired hopefully.
Project Location: Whitby, ON
Basement wall crack fix
Project Location: Whitby, ON
Water leaking into same corner of basement during heavy rains.
Project Location: Whitby, ON
Wet basement
Project Location: Whitby, ON
Noticed leakage after the heavy rains on Monday. Never had this issue before. Water on the floor close to furnace and adjacent exterior wall
Project Location: Whitby, ON
Have a few foundational crack to additionally deal along with exterior waterproofing.
Project Location: Whitby, ON
We are hoping to start finishing our basement in the future and want the foundation repaired before we do.
Project Location: Whitby, ON
Foundation crack needs repair. Thanks.
Project Location: Whitby, ON
Our basement has an area that leaks and I would like a quote on what it would cost to fix it.
Project Location: Whitby, ON
Lift a walkway
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

Clarke Basement Systems service area