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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 Oshawa
Smelly Basement Waterproofed in Oshawa, ON

Smelly Basement Waterproofed in Oshawa, ON

Before After
Smelly Basement Waterproofed in Oshawa, ON Smelly Basement Waterproofed in Oshawa, ON

A home in Oshawa, Ontario had a wet basement that was causing odors in the upstairs space of the home. The homeowner could not store any personal items in the basement because all of them would get damaged. They wanted to get rid of the moldy, smelly, wet area to allow for storage and resale in the future. 

The customer called Clarke Basement Systems and spoke to Steve Matthews, who explained the solution that would be done to fix the home. Jose Martinez and the team came in and installed CleanSpace, WaterGuard, and a TripleSafe sump pump. The CleanSpace directs any water and moisture into the installed WaterGuard, that then directs any excess water into the TripleSafe sump pump and is then directed away from the home. 

The customer was satisfied with the solution, because the space is now dry and healthy. There is no longer any smell and they feel confident storing items in the healthy space.

Cracked Concrete Deck in Oshawa, ON

Cracked Concrete Deck in Oshawa, ON

Before After
Cracked Concrete Deck in Oshawa, ON Cracked Concrete Deck in Oshawa, ON

A customer had issues with a settled and cracked concrete pool deck. After contacting our company, our team injected a polyurethane foam underneath the slab. They began by drilling small dime-sized holes through the concrete slab and injecting the polyurethane foam. It follows the path of least resistance, pushes down loose soil underneath, fills the voids and make the concrete level again. The entire area is protected against any future settlement.

Garage Settling in Oshawa, ON

Garage Settling in Oshawa, ON

Before After
Garage Settling in Oshawa, ON Garage Settling in Oshawa, ON

A homeowner in Oshawa, Ontario recently installed a new car lift in their garage. As they were working, they realized there was a sizeable void under the concrete floor. The homeowner was concerned that the concrete would not be stable enough to support a lift and a car. It may cause the substrate to settle even more and possible damage his new car.

 John DiNicolantonio, Project Lead for Canadian Concrete Leveling, visited the homeowner to take a look at what was happening with the garage floor and offer a few suggestions to fix the problem. In order to keep the lift and his new car safe, John suggested our PolyLevel® Foam system. It uses polyurethane foam to fill gaps and voids under concrete. Billy McKeown, Team Leader, drilled small dime-sized holes through the concrete and injected the foam under the slabs. The foam follows the path of least resistance and then expands to fill all the gaps and voids. The concrete was stabilized, sealed and leveled making it safe to install the car lift.

 The customer was extremely happy that we could give him peace of mind with a permanent solution for the concrete in his garage in such a short time.

Company Awards
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]
Clarke Basement Systems received #32 Dealer for Total Sales 2017-2018 out of hundreds of dealers across North America from Contractor... [Read more]
More Awards

Expert Basement Waterproofing & Foundation Repair Contractor Serving Oshawa, ON

Dave and his crew were awesome, and super-fast. ...
Happy Customers Surrounding Oshawa, ON
Work Requests

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Reviews From Oshawa
Testimonials From Oshawa
Not only were they thorough with what they did, but also left us with a feeling of "Do it right the first time". I can't thank you enough for your patience in...
Testimonial by Julie H. from Oshawa, ON
I just wanted to follow up on the excellent job that your technicians Kyle and Steve completed at the site on Friday.
Testimonial by Patrick O. from Oshawa, ON
The clincher for me is that throughout this entire process I was treated as a respected client. "You get what you pay for" and Clarke Basement Systems...
Testimonial by John T. from Oshawa, ON

Basement Waterproofing and Crawl Space Encapsulation in Oshawa

Whether you get water in your basement or want to protect your basement before you do, we can properly install a powerful sump pump and non-clogging drain tile system that will help keep your basement dry. Our award-winning WaterGuard and TripleSafe products are industry-leading, state-of-the-art drainage systems. We don't just install products in basements. We offer proven solutions that are installed by trained specialists who work in basements just like yours every day!

Our basement waterproofing systems can solve any waterproofing problem, including:

  • Musty odors
  • Wet basement floors and walls
  • Wet drywall
  • Sump pump issues
  • Leaky basement windows
  • Condensation

If you have a wet or leaky basement, it's not only uncomfortable, but it can also increase your energy bills and even cause health problems. Our waterproofing specialists can take a look at your basement to see what's causing your problems. We will recommend a basement waterproofing solution that's custom designed for your home. Our basement repair solutions include sump pumps, drainage systems, dehumidifiers, crack repair, vapor barriers and more.

Do you have a crawl space with water or mold problems? How about sagging floors above your crawl space? We can inspect your crawl space and recommend the best repair solution for your home, such as a vapor barrier, dehumidifier, or sump pump.

Oshawa, ON Foundation Repair Services

Soil erosion is common in the Oshawa area and often causes foundation problems for many homes. Luckily, Clarke Basement Systems has a team of in-house structural specialists who can help. We design and install foundation repair solutions and provide a 25-year warranty against defects on our foundation products. We provide Oshawa homeowners just like you with the most-reliable solutions, world-class service and the peace of mind knowing the job was done right.

Many homeowners experience foundation issues, but aren't sure what the problem actually is or how it can affect the safety and value of their home. If you think you might have a foundation problem, it's best to have it inspected by a trained professional.

We have the experience, expertise and products to fix any structural problem, including:

  • Bowing foundation walls
  • Cracks in walls and floor
  • Sagging floors above crawl space
  • Tilting chimney
  • And more!

Foundation problems can destroy your home's value and affect the safety and appearance of your home. If you think your home's foundation might need to be repaired, contact Oshawa's trusted foundation contractors today and schedule a free inspection and estimate.

Concrete Repair & Leveling in Oshawa

Soil erosion in Oshawa is known to cause damage to concrete driveways, sidewalks and patios. Sunken and cracked concrete around your home is both an eyesore and a safety hazard. Your concrete damage is also likely to get worse without the proper solution.

Clarke Basement Systems uses PolyLevel, a superior concrete repair technique to raise and level concrete slabs. Small holes are drilled in the concrete, a polyurethane foam is injected and the expanding foam lifts the concrete. Many contractors use mudjacking to repair concrete, but there are several problems with this method. With mudjacking, the process requires larger holes, the material is heavier and it can erode and washout. PolyLevel is an effective, long-lasting solution for restoring your concrete.

We also provide an effective cracked concrete repair solution, NexusPro. This ultra-durable cracked concrete repair system effectively seals cracks and joints, withstanding fluctuating temperatures, UV rays, extreme temperatures, and more to assure it lasts a lifetime.

After utilizing our concrete repair solutions, consider a concrete sealant that can extend your slab's life by 3 to 5 times in just one application. With SealantPro, a durable concrete sealing solution, your slabs will be protected against oil, gasoline, liquid, and debris!

If you have damaged concrete around your Oshawa home that you need fixed, contact us to request a free inspection and estimate today!

Case Studies From Oshawa
A home in Oshawa, Ontario had a basement that was constantly wet. The homeowner was complaining that the basement was always wet and it was causing...
Though simple and common, a crack in a poured foundation can can a lot of damage. In the case of Nick and Donna B in Oshawa the damage was a total...
Job Stories From Oshawa, ON
Transforming a Basement from Damp to Dry in Oshawa, ON

Karen M. noticed that she had a leak in her basement which caused her drywall and carpet to go mouldy. This unwanted water created an unpleasant environment for the tenant that occupied her basement, as it was damaging their belongings. Karen decided to contact Clarke Basement Systems for the ultimate solution.

The solution provided included our patented WaterGuard®Below-Floor Drain, CleanSpace® Basement Wall Vapor Barrier, IceGuard® Discharge Line System and the TripleSafe™ Complete Sump Pump System without the battery-operated pump. These systems worked together symbiotically to dry out the damp space and provide suitable drainage while still protecting the basement itself.

Now Karen no longer has to question if her basement is a healthy and livable space. Clarke Basement Systems is pleased to have been able to assist this Oshawa, ON homeowner and landlord with her basement transformation.


Transforming a Basement from Damp to Dry in Oshawa, ON - Photo 1Transforming a Basement from Damp to Dry in Oshawa, ON - Photo 2Transforming a Basement from Damp to Dry in Oshawa, ON - Photo 3Transforming a Basement from Damp to Dry in Oshawa, ON - Photo 4
Cracked Pool Deck in Oshawa, ON

A customer contacted us from Oshawa, Ontario, about a problem with their pool in the back yard. The concrete pool deck had settled and started to crack. This problem originated from a large tree located beside the pool that had large roots extending underneath the deck. It started to cause voids which led to the slab sinking and settling. Our customer was looking to sell their home in the near future and knew that an unleveled pool deck would put off potential buyers.

 John DiNicolantonio, Project Lead, recommended polyurethane foam be injected beneath the concrete. John explained all the benefits our PolyLevel® Foam system has to offer. It expands beneath the concrete, compresses the soil, then lifts and levels the slab. This ensures that the entire area is protected from any further settlement.

 Kyle McKeown, Foreman, drilled small dime-sized holes through the concrete and injected our PolyLevel® Foam underneath the slabs. The foam follows the path of least resistance underneath the concrete filling all the voids. The foam expands to lift the back of the pool deck and stabilize the rest of the area to protect from further settlement.

 Our customer was thrilled with the work that was done. They were pleased that the job was completed in an efficient manner and their landscapers could start working as soon as possible. 

Basement Waterproofing in Oshawa, ON

A home in Oshawa, Ontario, had problems in the basement. There was water leaking into the basement through the foundation causing damage to the floor and drywall. The air quality was musty and mold was starting to form. The homeowner wanted to fix the issues to prevent future damage, to prevent decrease in property value and bring the home back to a healthly state.

The customer called Clarke Basement Systems and talked to Steve Matthews, who explained the process of our solution.  Jose Martinez and the team came in and installed WaterGuard, Thermal Dry, TripleSafe and IceGuards. Thermal dry wall membrane was put on the walls to direct any moisture into the newly installed Waterguard along the perimeter of the basement. Any excess water is pushed into the Triplesafe Sump Pump and then out through the IceGaurds, away from the home. This system is guaranteed to keep the basement permanently dry. The customer is happy that we could restore the property value and that the home is healthy and the air is clean.

Basement Waterproofing in Oshawa, ON - Photo 1
Full Basement Waterproofing, Oshawa, ON

A home in Oshawa, Ontario had water seeping into the basement. There was water leaking at floor wall joint as well as previously repaired cracks. There was mold and constant flooding. The homeowners could no longer make use of their basement. 

The customer called Clarke Basement Systems to fix their basement so they could bring it back to use and feel healthy while doing so. Steve explained to the customer what would be done to the home. Lucio Flores and the team came in and installed a Waterguard, Cleanspace, Triplesafe Sump pump and an Iceguard. The Cleanspace was installed on all the walls keeping the moisture away from the basement and allowing any water to drop down into the Watergaurd. The Watergaurd collects the water and sends it to the TripleSafe Sump pump with three level of protection to keep the basement dry all the time, even in a power outage. The sump pump pushes the water out through the Icegaurd that is protected even in the cold months. With this system the customer will never see water in the basement again! They can rebuild the basement with no worry about leaking. 

Full Basement Waterproofing, Oshawa, ON - Photo 1
ThermalDry Flooring Keeps Oshawa, ON Basement Dry and Comfortable

While Anthony S. was refinishing his Oshawa, ON basement, he needed an effective solution for waterproof flooring that would be durable and attractive. While searching he contacted Clarke Basement Systems, who sent out Claude Mathieu to meet with Anthony about his flooring needs.


Claude introduced Anthony to the wide variety of styles and looks that are available with ThermalDry Flooring. This long lasting solution features raised pegs, allowing a small amount of breathing room to prevent any water seepage from getting stuck underneath. Primary Foreman Rob Trevisan worked diligently with his work crew to install Anthony’s new flooring. The finished project left Anthony with a brand new basement floor that will last him many years to come.


Work Requests From Oshawa, ON
Cracks in basement floor...water leaking in during rains
Elgin Street E in Oshawa
Looking for an estimate to have a sump pump installed into my basement.
Harmony Road N in Oshawa
Wet basement when it rains
Monaghan Ave in Oshawa
Estimate for crack in foundation, approx 3' x 8' x 5' deep
Farewell St in Oshawa
Hi. There's a crack in along the extiror wall in our basement that's letting water in when heavy rain fall. We'd like a repair quote pls
Sedan Cres in Oshawa
We have noticed some cracks in walls on our main floor around a doorway, stair, and the bay window at the front our house. We are planning some renos soon a would like to get these issues checked out prior.
Carlyle Crt in Oshawa
There is a leak coming from the floor seams of the basement. Also when it rains there is a hole where water gets through. I would appreciate it if I could have someone contact me to discuss a quote since I'm looking to have it repaired.
Windsor St in Oshawa
I want to get a price on fixing my basement leak.
Raglan Rd East in Oshawa
Would like to get quote to have basement waterproofed.
Stone Cottage Crescent in Oshawa
We have a crack in the basement wall that runs from the floor to the top of the wall and during a heavy rain, water leaks through and has damaged flooring. looking for options on repairing .
Cunningham Ave. in Oshawa
My basement is leaking in a few places
Aberdeen St in Oshawa
We have a 75 year old home and have water coming in a basement wall, right near a window well. We suspect the window well drainage is impaired (maybe needs to be excavated and new French drain etc put in).
Capri Ct. in Oshawa
Water continues to come in the basement from a window well area.
Swiss Height in Oshawa
Myrtle Rd. E. in Oshawa
Your company gave us an estimate for basement settling repair in 2012. However we were not able to go ahead with the work then. We would like a new estimate please. Thanks
Bond Street East in Oshawa
Hi There is a crack on the exterior of the foundation that I wanted to get checked to see if any action is necessary. Thanks David
Warren Ave in Oshawa
I would like a quote
Brock Street E in Oshawa
The floor of my cold room or electrical room maintains some moisture after it rains, as well as parts of the outside wall.
William Booth Crescent in Oshawa
Water damage and possible mold charge for inspections?
Sherbrook Dr in Oshawa
Foundation issues / garage floor cracking with driveway abutting it sinking . Already had internal water drainage in basement ... horrible foundation problem
Serving the following Oshawa, ON postal codes
L1G 0A1, L1G 0A2, L1G 0A3, L1G 0A5, L1G 0A6, L1G 0A8, L1G 0A9, L1G 0B1, L1G 0B2, L1G 0B3, L1G 0B4, L1G 0B5, L1G 0B6, L1G 1A1, L1G 1A2, L1G 1A4, L1G 1A5, L1G 1A6, L1G 1A7, L1G 1A8, L1G 1A9, L1G 1B1, L1G 1B2, L1G 1B3, L1G 1B4, L1G 1B5, L1G 1B6, L1G 1B7, L1G 1B8, L1G 1B9, L1G 1C1, L1G 1C2, L1G 1C3, L1G 1C4, L1G 1C5, L1G 1C6, L1G 1C7, L1G 1C9, L1G 1E1, L1G 1E3, L1G 1E5, L1G 1E6, L1G 1E7, L1G 1E8, L1G 1E9, L1G 1G1, L1G 1G2, L1G 1G3, L1G 1G4, L1G 1G5, L1G 1G6, L1G 1G7, L1G 1G8, L1G 1G9, L1G 1H1, L1G 1H2, L1G 1H3, L1G 1H4, L1G 1H5, L1G 1H6, L1G 1H7, L1G 1H8, L1G 1H9, L1G 1J1, L1G 1J2, L1G 1J3, L1G 1J4, L1G 1J5, L1G 1J6, L1G 1J7, L1G 1J8, L1G 1J9, L1G 1K1, L1G 1K2, L1G 1K3, L1G 1K6, L1G 1K7, L1G 1K8, L1G 1K9, L1G 1L1, L1G 1L2, L1G 1L3, L1G 1L4, L1G 1L5, L1G 1L6, L1G 1L7, L1G 1L8, L1G 1L9, L1G 1M1, L1G 1M3, L1G 1M4, L1G 1M5, L1G 1M6, L1G 1M7, L1G 1M8, L1G 1M9, L1G 1N1, L1G 1N2, L1G 1N3, L1G 1N4, L1G 1N5, L1G 1N6, L1G 1N7, L1G 1N8, L1G 1N9, L1G 1P1, L1G 1P2, L1G 1P3, L1G 1P4, L1G 1P5, L1G 1P6, L1G 1P7, L1G 1P8, L1G 1P9

our service area