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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

Before and After Pictures from Ajax
Before and After Flexispan® Fix in Ajax, ON!

Before and After Flexispan® Fix in Ajax, ON!

Before After
Before and After Flexispan® Fix in Ajax, ON! Before and After Flexispan® Fix in Ajax, ON!

Beautiful job by our System Design Specialist Chris Luke and Service Technician Mark Dougherty helping our clients get back to renovating their basement! 

Cracked Foundation Leads to Water on Basement Floor in Ajax, Ontario

Cracked Foundation Leads to Water on Basement Floor in Ajax, Ontario

Before After
Cracked Foundation Leads to Water on Basement Floor in Ajax, Ontario Cracked Foundation Leads to Water on Basement Floor in Ajax, Ontario

Finding water in your basement can make your stomach sink. You don’t know where it came from, you don’t know how to repair it, and you have no idea how much it will cost. 

A customer in Ajax, Ontario, discovered water on his basement floor. He searched the basement and found a few foundation cracks that were allowing moisture through. Concerned for his home’s wellbeing, he decided to reach out to a few contractors. He wasn’t confident until he discovered Clarke Basement Systems and met with System Design Specialist Chris Luke

Chris showed the homeowner our FlexiSpan® Crack Repair System, and he was happy to have a proven solution offered finally. Foreman Mark Dougherty started the repair by injecting a polyurethane sealant inside the crack. More polyurethane was used to seal the exterior, and a drain is placed on top. For added security, an in-floor drain was installed.

The customer is very pleased that his basement is dry. He appreciates the hard work and honesty of Mark and Chris and is confident that the repair will last.

Leaking Laundry Room in Ajax, ON

Leaking Laundry Room in Ajax, ON

Before After
Leaking Laundry Room in Ajax, ON Leaking Laundry Room in Ajax, ON

A basement in Ajax, ON, had an issue inside the laundry room. Three holes were leaking damaging the finished floor and walls. The main concern was that a tenant was renting out the basement and our customer wanted to make sure the area was a healthy and safe space. Thankfully Clarke Basement Systems was able to provide a permanent solution. Our team injected polyurethane into the holes to seal and prevent water from gaining entry into the laundry room. The area is now dry while being a safe and healthy space.

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

We Are Ajax's Proven Basement Waterproofing & Foundation Repair Contractor

Very enthusiastic people who really care about the work they do....
Happy Customers Surrounding Ajax, ON
Work Requests

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Reviews From Ajax
Testimonials From Ajax
The work was completed in a timely manner, everything was explained beforehand, and they left the place...
Testimonial by Peter G. from Ajax, ON
Our floors are already warmer and the air quality is much improved. Would highly recommend!
Testimonial by Zach D. from Ajax, ON
All works were of very good quality, professionally done from initial inspection to the final touch, and...
Testimonial by Mihail S. from Ajax, ON

Basement Waterproofing Experts Serving Ajax, 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 Ajax 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 Ajax 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 from under your house. 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
Case Studies From Ajax
Pat from Ajax, ON, was concerned with the moisture and dampness in her crawl space. After System Design Specialist Mark Dougherty inspected the crawl...
Job Stories From Ajax, ON
Crawl Space Fix Up in Ajax, ON

A woman with mould in her crawl space needed some help with moisture control. Crawl spaces are very prone to moisture buildup. Lucky for her, we have a well-suited solution to help with moisture levels and prevent mould growth. System Design Specialist Mark Dougherty introduced our CleanSpace® encapsulation system and our sump system to the homeowner. This solution is customized to fit your crawl space needs. Installation Foreman Lucio Flores and his crew installed the systems starting with the CleanSpace® membrane, followed by the SmartSump® system. When the job was done, our customer could immediately notice a difference in the overall air quality of her home!

Crawl Space Fix Up in Ajax, ON - Photo 1
Ajax, ON Basement Flooding Fixed with FlexiSpan

When Ajax, ON homeowner Steve B. discovered that a part of his basement floor was soaking wet, he wondered where water was coming from.  Looking for a waterproofing contractor, Steve went online and soon after found Clarke Basement Systems whom he contacted that same week.


That same week, Steve was met by waterproofing specialist Dale Coville to evaluate his basement.  After a careful examination, Dale discovered that a crack in Steve’s basement wall allowed water to intrude and flood his basement.  Dale proposed that FlexiSpan should be installed along the crack in the wall.  FlexiSpan is a wall sealant that is used to eliminate cracks in walls that allow in water.  Unlike hydraulic cements and other epoxies, FlexiSpan is a polyurethane polymer and will not dry out or crack due to the natural movement of the foundation wall.  Additionally, FlexiSpan has the added advantage of bending and stretching along with your foundation wall, unlike hydraulic sealants or epoxies.  Dale immediately called in primary foreman Fitz Wilks and his crew to apply the Flexispan.


After a quick and easy one day application process, Steve’s basement was effectively waterproofed with FlexiSpan. Now that water is no longer getting into his basement, Steve can enjoy his basement to its fullest potential!

Faulty Sump Pump Causes Ajax, ON Basement Flooding

After a particularly heavy storm, Ajax, ON homeowner Senthil G. found that his basement was taking in water.  Questioning where his waterproofing system went wrong, Senthil decided to go online to search for waterproofing companies.  After numerous searches, Senthil eventually came across Clarke Basement Systems whom he contacted that same day.  


Senthil was soon met by waterproofing specialist Dale Coville at his Ajax, ON home.  Dave immediately went down to the basement to access the problem.  What he discovered was that Senthil’s sump pumps were failing, and although the rest of his waterproofing products were in order, the failure of the sump pump caused a buildup of water that could not escape.  Luckily for Senthil, Dave had the ideal solution for his basement.  Dave recommended replacing the faulty sump pump with two top of the line sump pumps, the Zoeller Model 53 and the Zoeller Model 98.  The Zoeller Model 53 is the ideal sump pump for any situation and one of the best sump pumps you can buy.  The Model 98 is a larger version of the Model 53 and is installed when more groundwater is present or expected.   With the products agreed upon, Dave called in primary foreman Fitz Wilks and his crew to install the necessary products.


No home is 100% no matter how much precaution one takes; annual check ups should be always an option to get the best results out of your products.  Thanks to the professionals at Clarke Basement Systems, Senthil’s basement will stay dry for years to come!

Work Requests From Ajax, ON
Project Location: Ajax, ON
Hi there! I have a damp carpet in one of my closets in my basement recently from all the rain. It's not super soaked but just damp. Added to that I noticed a foundation crack in my laundry room and a smaller crack as well. Would like to get a free estimate if possible! Thanks!
Project Location: Ajax, ON
Leaky basement at 2 points from exterior wall - facing the backyard. Furnished basement.
Project Location: Ajax, ON
Foundation leak in basement
Project Location: Ajax, ON
I have water coming in my basement again
Project Location: Ajax, ON
Project Location: Ajax, ON
House is settling unevenly. staircase cracks on one side of brick wall, doors are sticking, cracks on inside wall.
Project Location: Ajax, ON
We have noticed considerable step-cracking as well as gaps on one side (east-facing) of our 30+ yr. old house. The cracking is more prominent toward the front of the house where the garage meets the house but we have also seen new cracking on the same wall near the back of the house. We have noticed horizontal cracking here and there on other walls. There is also a crack on the concrete floor of our garage from side to side near the middle.
Project Location: Ajax, ON
Leaky cold cellar with mold formation
Project Location: Ajax, ON
We have a small leak in a corner of our basement.
Project Location: Ajax, ON
Leak in the basement after heavy rain (generally spring time)
Project Location: Ajax, ON
I have a rental property and the basement has a leak from the foundation I think
Project Location: Ajax, ON
We noticed a minor water leak from a foundation crack after the rain today.
Project Location: Ajax, ON
I own a triplex in Ajax. It was built in 1968. I'm looking for a quote to waterproof/winterize the crawl space.
Project Location: Ajax, ON
Hi there, wanted to get a quote for a crawl space clean.
Project Location: Ajax, ON
Hello, Hoping you can assist us with a water leak we have in our basement. During moderate to heavy rainfall, there begins a leak from one of the walls that eventually gets drained in our laundry room. We believe the water is coming from the side of the house, but we'd like your help in diagnosing that. There's also a smaller leak coming from our laundry room. Thanks, John Myhal
Project Location: Ajax, ON
Can you call me to have an estimation
Project Location: Ajax, ON
Leaking in basement
Project Location: Ajax, ON
Crawlspace is not fully insulated, concerned about the chance of water pipes freezing in the winter.
Project Location: Ajax, ON
Cold, damp dirt floor crawl space. Musty smell in house
Project Location: Ajax, ON
Hello I would like a quote on insulation and vapour barrier installation for my crawl space. I look forward to hearing from you. Thank you
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