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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 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.

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]
Habitat Canada brings communities together to help families build strength, stability and independence through affordable homeownership. Canadian Concrete Leveling donated their... [Read more]
More Awards

Your Certified Oshawa Foundation Repair & Basement Waterproofing Contractor

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
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

Located along the Lake Ontario shoreline, Oshawa is prone to flooding and soil erosion caused by coastal storms. This puts homes in the area at risk for basement flooding and foundation damage. Clarke Basement Systems has been providing basement waterproofing, crawl space encapsulation, foundation repair and concrete levelling solutions to Oshawa homeowners since 2003, and we have fixed thousands of homes just like yours.

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!

TripleSafe sump pump installation in Oshawa

Our TripleSafe sump pump system has three pumps to give you complete protection.

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.

Drywall crack around door frame

Drywall cracks around door frames are a common sign of a foundation problem.

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 Leveling & Repair 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.

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
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.

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. 

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
Vimy Avenue in Oshawa
It was heavy rain I saw water and saw cracks and traces of water in it.
Tralee Crt in Oshawa
Water in my basement...this time it's on the other side of the house. I believe it is the foundation but the basement is finished so I'm not 100% sure. Thanks for your help.
Lasalle Ave in Oshawa
I'm noticing cracks in my living room walls and mouldings. There are also cracks in the finished basement, in around the window and the baseboards. There is also stings of water damage in the basement.
Burk St in Oshawa
Please contact me
Ferndale Street in Oshawa
The concrete slab floor in my garage has sunken over time, is uneven and has some significant cracking as a result. We would like to understand if Polylevel may be a good option to raise and level the floor and get a quote on the work to do it.
Carnaby Cres in Oshawa
I have a bit of water leaking into my basement crawlspace
Steepleview Crt in Oshawa
I have cracks in the basement and I want an estimate how much will cost if we do it from inside and/or outside.
Cloverdale Street in Oshawa
I would like a quote on enlarging basement walkout, foundation repair, and egress window install please.
Ritson Road in Oshawa
I have a crawl space with a sump pump in my home and I believe that it might need an annual service. It is currently working, but I bought the house during the spring so to be cautious, I would like a quote.
Meath Drive in Oshawa
Hello. We have what appears to be a very small leak in our foundation that dribbles into the basement from an outside wall. We were hoping to have someone come out to assess it as we are having the basement finished. Thank you.
Glaspell Cres in Oshawa
Just discovered what seems to be a leak in our basement.
Eastlawn Street in Oshawa
Our basement recently flooded. We would like an estimate to correct this issue and prevent future flooding. We have gutted the basement and recently snaked the basement drain, however we would like a permanent solution prior to doing any further renovations.
French St in Oshawa
Ritson Rd. South in Oshawa
Leaky basement and walls.
Albert ST in Oshawa
Basement leaking
Hillcroft Street in Oshawa
Crack leaking under basement window.
Oshawa Blvd North in Oshawa
Hello, We have our basement done a few year ago and would like to ask if maintenance/service is still offered and the cost? We are noticing it smells damp/musty at times so not sure if maybe the dehumidifier or the interiors channels need to be flushed.
Columbus Rd in Oshawa
I need someone to come out and find out why water is coming in basement
Paddington Cres. in Oshawa
Bad smell in basmement. Noticed damp carpet close to window today. Looking to get fixed. Thank you
Colborne St E in Oshawa
Hi there, I have a small area of foundation directly under a basement window on the east side of my house that appears to be eroding. I'd like to have a quote to repair/patch it. I will be putting my house up for sale in the near future and could just fill the window well in with gravel to cover it but I'd rather look at repairing it/patching it for the next buyer if it's not too expensive. I've owned for almost 4 years and there has never been a leak inside my house. I have photos to share if that helps. Look forward to hearing from you & thanks.
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