Contact Us For
A Free Estimate!
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 Thornhill
Multiple Cracks in Wall Foundation, Thornhill, ON

Multiple Cracks in Wall Foundation, Thornhill, ON

Before After
Multiple Cracks in Wall Foundation, Thornhill, ON Multiple Cracks in Wall Foundation, Thornhill, ON

A home in Thornhill, Ontario had a wall foundation with multiple cracks in it. There was water seeping through the cracks causing the floor to be wet. The customer had previous plumbing problems and was tired of seeing water in their home. They wanted a dry basement and did not want to constantly worry about water entry.

The customer called Clarke Basement Systems and talked to Chris Luke, who explained everything that would be done to waterproof. Mark Dougherty and the team came in and installed Flexispan wall crack repair on the cracks and then installed Clean space over top for extra protection. The patented Flexispan wall crack repair system has a 25 year warranty. They also installed a drainage system in the floor, below the cracked area to collect any water that tries to seep through. Now the basement is dry and the customer can rest easy. 

 

Large Waterproofing Job to Save a Living Space, Thornhill, ON

Large Waterproofing Job to Save a Living Space, Thornhill, ON

Before After
Large Waterproofing Job to Save a Living Space, Thornhill, ON Large Waterproofing Job to Save a Living Space, Thornhill, ON

A home in Thornhill, Ontario, had a basement apartment that was constantly leaking. Other companies had tried to fix the problem, but they couldn’t solve the problem. The basement was large and there was many areas where water was seeping through. The basement was a someones living space that generates revenue for the homeowner, and the space was un-liveable. The tenant moved out due to the problem.

The customer contacted Clarke Basement Systems to find a solution. Jose Martinez and the team came in and installed a full perimeter of WaterGuard drainage system, ThermalDry wall membrane, a TripleSafe sump pump and Window Well Ducts to take care of the problem. The Sump Pump was put into a small area in the basement to make sure it was out of the way. With the collaboration of all these waterproofing products the basement is permanently dry. The job was done properly, efficiently and the customer can now re-finish the basement. 

Lifted Slab Caused Indoor Water Damage, Thornhill, ON

Lifted Slab Caused Indoor Water Damage, Thornhill, ON

Before After
Lifted Slab Caused Indoor Water Damage, Thornhill, ON Lifted Slab Caused Indoor Water Damage, Thornhill, ON

A home in Thornhill, Ontario, had a problem in the basement along the front wall. There was a small amount of water coming into the home. This happened after a heavy rain because the concrete slabs at the entrance way had settled toward the home. Water flowed toward the home and made its way into the basement. The slabs were also a trip hazard. The house was being used for a business and was going to be sold. They wanted to fix the issues before selling it.  

The homeowner called Canadian Concrete Leveling to fix the issues. Ron Monk inspected the area and explained how the job would be done. Billy McKeown and his team came in and used PolyLevel foam injections to divert water away from the foundation and eliminate trip hazards. They used NexusPro to seal any joints where water could penetrate. The customer was satisfied because the house was ready to sell without issue.

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]
Ratings are calculated based on consumer-review websites and blogs, social networks, business rating services and other award information to determine... [Read more]
More Awards

Your Certified Thornhill, ON Foundation Repair & Basement Waterproofing Contractor

Well done - all 'round!...
Happy Customers Surrounding Thornhill, ON
Testimonials
Reviews
Work Requests

Click the icons to see what our customers had to say.

Reviews From Thornhill
Testimonials From Thornhill
It's exactly what we wanted. We will definitely recommend your company. Thanks again!
Testimonial by Bethany W. from Thornhill, ON

Basement Waterproofing & Crawl Space Repair in Thornhill, Ontario

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 Thornhill 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

Structural & Foundation Repair in Thornhill

Foundation repair problems destroy your Thornhill 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
  • Sticking Windows
  • Underpinning

PolyLevel™ Concrete Leveling & Lifting

The sunken and cracked concrete around your Thornhill home is both an eyesore and a safety hazard. It is also likely to get worse, but we can fix it for you.

Our experts use PolyLevel, a superior polyurethane foam. Small holes are drilled in the concrete, the foam is injected and the expanding foam lifts the concrete. The majority of contractors you will call use mudjacking instead of foam. Mudjacking is heavier, require larger holes in the concrete and does not last as long as PolyLevel. Call us today to learn more about our proven concrete lifting and leveling techniques.

We Fix
  • Cracked Driveways
  • Uneven Patios
  • Sinking Sidewalks      

  • Uneven Concrete
  • Sunken Pool Decks
  • Highway & Commercial Issues
Case Studies From Thornhill
Basement
Contractor was doing a renovation for a customer who had a very wet basement. There had been a wood sub floor which had totally rotted and needed to...
Job Stories From Thornhill, ON
Large Waterproofing Job to Save a Living Space, Thornhill, ON

A home in Thornhill, Ontario, had a basement apartment that was constantly leaking. Other companies had tried to fix the problem in the past, but they couldn’t solve the problem. The water was seeping up through the basement floor in numerous locations throughout the basement. The basement was a living space that generates revenue for the homeowner, and the space was un-liveable. The tenant moved out due to the problem.

The customer contacted Clarke Basement Systems to fix the problem. Jose Martinez and the team came in and installed a full perimeter of WaterGuard drainage system, ThermalDry wall membrane, a TripleSafe sump pump and Window Well Ducts to take care of the problem PERMANENTLY. The ThermalDry wall membrane, collects any seepage and moisture and directs it into the WaterGuard. The WaterGuard directs the water into the TripleSafe Sump Pump and out away from the home. The job was done properly, efficiently and in a timely manner.Th customer can now re-finish the basement and it can again generate revenue for owners. 

Lifted Slab Caused Indoor Water Damage, Thornhill, ON

A home in Thornhill, Ontario, there was a problem in the basement along the front wall. There was a small amount of water causing the carpet under a desk to be wet. This happened during a very heavy rainfall. This was a result of concrete slabs at the entrance way to the building that had settled toward the home. Water flowed toward the home and made its way into the basement over the top of the foundation. The slabs were also a trip hazard. The house which was being used for a business was going to be sold and they didn’t want to pass along an issue to any buyer.  It could affect the resale value of the property as well as continue to cause damage to building materials. 

The homeowner called Canadian Concrete Leveling to fix the issues before they worsened. Ron Monk inspected the area and explained everything that would be done. Billy McKeown and his team came in and used PolyLevel foam injections and NexusPro. The products were used to divert water away from the foundation and eliminate trip hazards and also to seal any joints where water could penetrate. NexusPro sealant was used to seal the joints to keep water out from indoors. The customer was satisfied because the house was ready to sell without issue.

Multiple Cracks in Wall Foundation, Thornhill, ON

A home in Thornhill, Ontario had a poured wall foundation with multiple cracks in it. This was causing the floor to be wet. The customer had previous plumbing problems and was tired of water. They wanted a dry basement and did not want to constantly worry about water entry.

The customer called Clarke Basement Systems and talked to the inspector Chris Luke, who explained the simple process of what would be done. Mark Dougherty and the team came in and installed Flexispan wall crack repair On the crack and then installed Clean space over top for extra protection. The patented Flexispan wall crack repair system has a 25 year warranty. They installed a drainage system in the floor below the crack to collect any water that tries to seep through. Now the basement is dry and the customer can rest easy. 

 

 

Work Requests From Thornhill, ON
Lilac Ave in Thornhill
I have a crack in the foundation that I would like an estimate for please Thank you so much
Brookmill Dr. in Thornhill
Jaimie Road in Thornhill
Are you available tomorrow to discuss a few issues we want to address to give us an estimate/estimates on options available to us re: PolyLevelâ„¢ Concrete Leveling & Lifting Structural & Foundation Repair Basement Waterproofing & Crawl Space Repair, or other. Hoping to here from you shortly.
Courtham Ave. in Thornhill
Water seeping into the basement may be from the foundation
in Thornhill
I would like a quote on a dehumidifier for our basement.
Brookmill Drive in Thornhill
We have a leak on one of our basement walls. We are not sure why. Probably need an estimate.
Holm Cres in Thornhill
Rain water is leaky through the foundation on one side of the house.
Marsnow Drive in Thornhill
I need to lift 5 concrete slabs around the pool to level the deck.
Aileen Road in Thornhill
Water is penetrating in one corner basement room and after heavy quick rainfall, water also enters from a basement wash room window when window hole is filled with surface runoff.
Ramblewood Lane in Thornhill
Crack in foundation - crack on inside of garage. Two other cracks appearing but has not affected inside garage.
Porterfield Cres in Thornhill
Looking to get an injection on 2 walkways.
Roman Rd in Thornhill
I found a vertical crack on my basement wall last week. It's a crack from top to bottom. I would like to get it checked by a specialist and get a estimate for repair.
Parklawn Cres in Thornhill
Part of foundation seems sinking, several cracks in interior and exterior. Wish you can arrange a experienced pier specialist to give us a free estimate.
Babcombe Drive in Thornhill
We have recently discovered a small, isolated dampness in our basement. The dampness occurs after a heavy rain or following a snow melt.
York Hill Blvd in Thornhill
Looking to get concrete slab under pool equipment raised. Approx 5x11
MacArthur Drive in Thornhill
Any time there is rain outside I see a little bit of water pooling in one part of the basement on the floor.
Mendel Cresc in Thornhill
Crack in basement wall. Slow leak in basement when heavy rain or snow melt
Kirk Drv in Thornhill
The exterior porch has settled and sloped over last 11 years. It is not resting on any basement or foundation of the house.
Esther Cres in Thornhill
I currently have a manual sump pump and would like to upgrade.
Bright Bay in Thornhill
Has an addition that is only on footers and has started to settled. There is no slab. Appointment was made.
Serving the following Thornhill, ON postal codes
L3T 0A1, L3T 0A2, L3T 0A3, L3T 0A4, L3T 0A5, L3T 0A6, L3T 0A7, L3T 0A8, L3T 0A9, L3T 0B1, L3T 0B2, L3T 0B3, L3T 0B4, L3T 0B5, L3T 0B6, L3T 0B7, L3T 0B8, L3T 0B9, L3T 0C1, L3T 0C4, L3T 0C5, L3T 0C6, L3T 0C7, L3T 0C8, L3T 0C9, L3T 0E1, L3T 0E2, L3T 0E3, L3T 0E4, L3T 0E5, L3T 0E6, L3T 0E7, L3T 1A1, L3T 1A2, L3T 1A3, L3T 1A4, L3T 1A5, L3T 1A6, L3T 1A7, L3T 1A8, L3T 1B1, L3T 1B2, L3T 1B3, L3T 1B4, L3T 1B5, L3T 1B6, L3T 1B7, L3T 1B8, L3T 1B9, L3T 1C1, L3T 1C2, L3T 1C3, L3T 1C4, L3T 1C5, L3T 1C6, L3T 1C7, L3T 1C8, L3T 1C9, L3T 1E1, L3T 1E2, L3T 1E3, L3T 1E4, L3T 1E5, L3T 1E6, L3T 1E7, L3T 1E8, L3T 1E9, L3T 1G1, L3T 1G2, L3T 1G3, L3T 1G4, L3T 1G5, L3T 1G6, L3T 1G7, L3T 1G8, L3T 1G9, L3T 1H1, L3T 1H2, L3T 1H3, L3T 1H4, L3T 1H5, L3T 1H6, L3T 1H7, L3T 1H8, L3T 1H9, L3T 1J1, L3T 1J2, L3T 1J3, L3T 1J4, L3T 1J5, L3T 1J6, L3T 1J7, L3T 1J8, L3T 1J9, L3T 1K1, L3T 1K2, L3T 1K3, L3T 1K4, L3T 1K5, L3T 1K6, L3T 1K7, L3T 1K8, L3T 1K9, L3T 1L1, L3T 1L2, L3T 1L3, L3T 1L4, L3T 1L5, L3T 1L6, L3T 1L7, L3T 1L8, L3T 1L9, L3T 1M1, L3T 1M2

our service area