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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

Aspen Air Filter

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
LintelLift Garage Lintel Repair

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 Oshawa
Wall Crack Destroys Basement Wall in Oshawa, ON

Wall Crack Destroys Basement Wall in Oshawa, ON

Before After
Wall Crack Destroys Basement Wall in Oshawa, ON Wall Crack Destroys Basement Wall in Oshawa, ON

Seeing water run down the wall of your finished basement can leave you a little upset. Thousands of dollars go into creating a basement, and a water leak can wash your money away.

An Oshawa, Ontario, homeowner, Malik, was frustrated to see his basement beginning to fall into disrepair along one wall. A large crack had formed, and water was seeping into the space and ruining the drywall. So he reached out to Clarke Basement Systems for a fix.

System Design Specialist Ryan Hanlon inspected the crack behind the wall and recommended our FlexiSpan® Crack Repair. Malik was happy to hear the repair could be completed in one day, and Foreman Ali Feroudini was tasked with the installation.

Ali injected the polyurethane sealant directly into the crack before sealing the exterior. To ensure a complete repair, he dug a small ditch below the crack as a backup for additional cracking and used fresh concrete to relevel the floor.

Malik was blown away by the entire process. From reaching out to our Call Centre, meeting with Ryan, and having the installation done, he was impressed with our company's honesty and hard work. He quickly rebuilt the basement wall and said it looks better than ever.

Flexispan Fix in Oshawa, ON

Flexispan Fix in Oshawa, ON

Before After
Flexispan Fix in Oshawa, ON Flexispan Fix in Oshawa, ON

Homeowner in Oshawa, ON, was stressed out about the water seepage that was causing damage to the finished walls and carpet in their home. They could no longer use the space and needed it fixed before it continued to cause any further damage! 

They contacted Clarke Basement Systems and scheduled an inspection with System Design Specialist, Ron Monk. Ron Monk attended the home and concluded that cracks in their foundation walls caused the water seepage. This usually happens when it is a poured concrete wall.

Ron Monk concluded that to seal the leak properly, we would need to install our patented FlexiSpan® on the homeowners poured wall foundation.

With the plan set in place, Installation Foreman, Mark Dougherty and his team got to work. They removed the existing drywall and insulation of the home, then installed FlexiSpan® on the wall foundation.

When the work was finished, the homeowner was ecstatic that there would be no more water seepage and that they are guaranteed with the 25-year warranty. They can now renovate their home and not have to worry about any potential damage thanks to Clarke Basement Systems.





Damp Cold Room Unusable in Oshawa, Ontario

Damp Cold Room Unusable in Oshawa, Ontario

Before After
Damp Cold Room Unusable in Oshawa, Ontario Damp Cold Room Unusable in Oshawa, Ontario

Cold rooms are a unique little space. Not every home has one, and they’re typically made of concrete. These rooms are different than a typical storage room, and they tend to be susceptible to cooler temperatures and moisture. 

A customer in Oshawa, Ontario, had a wet and stinky cold room. He wanted to start using the space, but the condition it was in made it hard to store anything. The homeowner thought they were stuck with a barely usable room, but figured they’d call Clarke Basement Systems anyway. 

After meeting with System Design Specialist Chris Luke, the homeowner was happy they reached out. Chris showed them our Cold Room Encapsulation System and a date was set for the repair.

Foreman Don Clarke encapsulated the room using CleanSpace® Vapour Barrier to stop water from seeping in through the walls. A drainage panel was added to the ceiling, and our WaterGuard® Drain System was installed around the perimeter.

The customer is happy to finally have a usable storage room. They love how bright the space looks, and were impressed with the service from Chris and Don.

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]
More Awards

Basement & Crawl Space Waterproofing in Oshawa, ON

The clincher for me is that throughout this entire process I was treated as a respected client. "You get what...
Happy Customers Surrounding Oshawa, ON
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Reviews From Oshawa
Testimonials From Oshawa
We felt Clarke Basement Systems would suit our needs the best. The fact that it was the least expensive was...
Testimonial by Linda L. from Oshawa, ON
Clarke Basement Systems was amazing
Testimonial by Nicholas L. from Oshawa, ON
Great job! Lucio, Stefan and Connor were professional, reliable & respectful of my home.
Testimonial by Sharon M. 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. A failing garage lintel can also be a sign of structural settlement. Cracks along the brickwork, sagging, and pulling away from the home are all signs of a failing garage lintel. We offer expert garage lintel repair by installing the patented LintelLift garage lintel repair system.

If you think your home's foundation or garage lintel 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
These customers from Oshawa, ON, had a beautifully finishes basement, but had an ugly old cold room that was cramping is its style. It was musty,...
A basement in Oshawa, ON, had a small leak allowing water to seep in. The homeowners were afraid there were cracks they were unaware of that could...
This multiple-weighted crawl space in Oshawa, Ontario, needs a proper waterproofing job to eliminate the moisture and potential mold build-up that...
Job Stories From Oshawa, ON
Replacing the Old Pump with the New SuperSump®, Oshawa, ON

Typically, we do full basement encapsulations, but it's only partially necessary in some cases. For example, homeowners in Oshawa, Ontario, had noticed that their sump pump was overflowing and freezing during winter. They found the basement solution team at Clarke Basement Systems showcasing our many options for sump pumps. We scheduled our most experienced System Design Specialist to suggest our SuperSump® sump pump. It pumps water through more than the average system and has an alarm system in case the water rises above its limit. Following the discharge line, our Specialist, Chris Luke, recommended our IceGuard® anti-freezing discharge line attachment to have the sump pump water out even during the coldest days during the winter. For extra precaution later down the road, if the walls have any leaking issues, Chris mentioned that our WaterGuard® would fit wonderfully in the space and connect straight to the newly built SuperSump®. From start to finish, the homeowners were delighted with the installation, the knowledge, and the immaculate clean up!

Replacing the Old Pump with the New SuperSump®,  Oshawa, ON - Photo 1
Hydrostatic Pressure Fix with FlexiSpan®

Homeowner in Oshawa, ON, had a lot of water seepage that was causing damage to the finished walls in her basement, as well as the carpet.

The homeowner was very stressed due to the water leaking in her basement. The carpet had to be torn out, and the walls were completely ruined. The space could no longer be utilized for their workout activities or guests. They were concerned with the overall damage and future damage that would occur if they did not get the leak fixed.

They knew that they wanted to fix the damaging cracks in their foundation, they contacted Clarke Basement Systems to set up an inspection with System Design Specialist, Ron Monk.

Ron Monk attended the home and assessed that the damage was a result of the home being a poured concrete foundation wall, which is susceptible to wall cracks and water damage. The foundation wall cracks are due to the hydrostatic pressure of the poured concrete walls in the home.

In order to properly seal the leak in the foundation, we would need to: Remove and dispose of any finished wall materials such as drywall, studs and insulation. Next, we install our patented FlexiSpan® on the customers poured wall foundation.

Once we had the perfect solution to permanently fix any future water seepage, Installation Foreman, Mark Dougherty and his team got to work! They removed the existing drywall and insulation of the home, then installed FlexiSpan® on the wall foundation.

Once the work was completed, the customer was relieved as there was no further leaking and that the Flexispan® provided a 25-year warranty. Now, the customer can replace their floors, repair their walls, and reclaim the space again for any future guests or workout activities!




Hydrostatic Pressure Fix with FlexiSpan® - Photo 1Hydrostatic Pressure Fix with FlexiSpan® - Photo 2Hydrostatic Pressure Fix with FlexiSpan® - Photo 3Hydrostatic Pressure Fix with FlexiSpan® - Photo 4Hydrostatic Pressure Fix with FlexiSpan® - Photo 5
Complete Basement Waterproofing in Oshawa, ON

We understand how exciting it is to become a homeowner. We wanted to make our clients happy about their new home again! When they had leaking and condensation in their basement, it took away from their experience. When they finally had enough and wanted their basement fully waterproofed, they contacted Clarke Basement Systems for a free quote. Our System Design Specialist, Chris Luke, assessed their home and put together a waterproofing plan that would permanently solve their problems. Once we had our plan set in place, our Installation Foreman, David Jackson, was able to repair, insulate, and control the water leaking into their home by using WaterGuard® and ThermalDry Wall. When we had completed the job, our clients were thrilled, and we were happy to have restored their enthusiasm for their new home again.

Complete Basement Waterproofing in Oshawa, ON - Photo 1Complete Basement Waterproofing in Oshawa, ON - Photo 2
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
Project Location: Oshawa, ON
I'm hoping to water seal my basement from inside
Project Location: Oshawa, ON
Looking for a quote for the repair of 2 foundation cracks
Project Location: Oshawa, ON
Old house periodically during spring thaw or major rain storm water comes in from bottom of walls hydrostatic pressure
Project Location: Oshawa, ON
While doing a demo to renovate I have discovered a dirt crawl space. Would like to find out what the best solution is to removing he musty/damp smell
Project Location: Oshawa, ON
We have just purchased the home and wanted to repair the cracks around the foundation so we would like an estimate
Project Location: Oshawa, ON
Had some water penetrate the foundation during a recent storm.
Project Location: Oshawa, ON
A single family Unit our management company manages - tenant reported basement leaking over the weekend. Unfinished.
Project Location: Oshawa, ON
Had water make its way into basement a couple times, took down drywall and studs that have been damged, need waterproofing
Project Location: Oshawa, ON
Water coming into basement with heavy rainfall. Would like quote for sump pump / weeping tile and advice on which option we need, or both. Thanks!
Project Location: Oshawa, ON
I would like a quote to have my basement waterproofed from the inside.
Project Location: Oshawa, ON
The carpet of my cold storage in my basement is wet. No able to figure out the leakeage.
Project Location: Oshawa, ON
Hi, I have a house in Oshawa that I have water getting in basement. I need you to review and get options to fix. I have used your company twice in the past. Please scheduled an appointment asap. I am available this week. Thanks Dwayne
Project Location: Oshawa, ON
Looking at getting an interior weeping system put in one corner of my basement. It is my dad's kitchen and it appears that during heavy rain or thaw that it comes in the corner, but it's impossible to know the exact spot since it is a finished space. Just looking to go over options
Project Location: Oshawa, ON
Buckling basement is starting to leak. Home inspection reveals the basement needs to be reinforced. Are you available this Wednesday afternoon around 3-4pm?
Project Location: Oshawa, ON
Need a quote and advice for waterproofing
Project Location: Oshawa, ON
Slanting floor and gaps in flooring increasing day by day
Project Location: Oshawa, ON
I have some water damage in my basement. I've removed the laminate flooring and found the subfloor is damp and black along an outside wall.
Project Location: Oshawa, ON
Sagging floors in kitchen and upstairs, need a consultation to raise and possibly repair joists. We have some metal poles but the also need to be adjusted, some added and some replaced due to rusting.
Project Location: Oshawa, ON
Large crack in basement foundation. Starts at window and ends ~6 inches from basement floor. Attempted to seal on my own with filler however still appears to leak. Crack can be seen at window from outside. Need done ASAP. And information appreciated. Thank you in advance 🙏🏼
Project Location: Oshawa, ON
At times I can get a strong mouldy odour in the basement and the cellar.
Serving the following Oshawa, ON postal codes
L1C, L1G, L1H, L1J, L1K, L1L, L1N
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