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Reviews From Keswick
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 Keswick
Upgrading to a TripleSafe™ in Keswick, ON

Upgrading to a TripleSafe™ in Keswick, ON

Before After
Upgrading to a TripleSafe™ in Keswick, ON Upgrading to a TripleSafe™ in Keswick, ON

This customer wanted the most reliable sump pump system to ensure that their basement didn't flood during a blackout. The TripleSafe™ Complete Sump Pump System with the Battery Back-Up was just what they needed!

Saying Goodbye to Frozen Discharge Lines in Keswick, ON

Saying Goodbye to Frozen Discharge Lines in Keswick, ON

Before After
Saying Goodbye to Frozen Discharge Lines in Keswick, ON Saying Goodbye to Frozen Discharge Lines in Keswick, ON

To ensure that their discharge lines didn't freeze, this customer got our patented IceGuard® Discharge Line System.

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]
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]
More Awards

Expert Basement Waterproofing & Foundation Repair Contractor Serving Keswick, ON

Happy Customers Surrounding Keswick, ON
Work Requests

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

Basement Waterproofing Experts Serving Keswick, 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 Keswick 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 Keswick 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


Crawl Space Vapor Barrier Encapsulation Experts

Crawl space encapsulation is the best way to eliminate musty odors, mold, moisture and mildew. 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

Fast & Affordable Concrete Repair

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

Our experts use PolyLevel, a superior polyurethane foam to provide reliable concrete lifting & leveling solutions. Small holes are drilled in the concrete and the expansion of the foam lifts & levels the concrete. The majority of contractors you will call use mudjacking instead of foam. Mudjacking is heavier, requires larger holes in the concrete and does not last as long as PolyLevel.

If your home has cracked concrete steps, pool decks, patios, or other slabs, then NexusPro is the right solution. NexusPro repairs concrete cracks and joints and is ultra-durable, so it will withstand UV rays, extreme weather, and more.

After utilizing our expert concrete repair solutions, consider the powerful concrete sealant, SealantPro. SealantPro further protects your concrete by bonding with it to guard against oil, gasoline, liquids, and other debris. In just one coat, SealantPro extends the life of your concrete by 3 to 5 times overall. 

Call us today to learn more about our proven concrete leveling, cracked concrete repair, and concrete sealing techniques.

We Fix
  • Cracked Driveways
  • Uneven Patios
  • Sinking Sidewalks      

  • Uneven Concrete
  • Sunken Pool Decks
  • Highway & Commercial Issues
Case Studies From Keswick
A crawlspace in Keswick, Ontario had a dirt floor which was allowing moisture to seep upward into the living space of the house, causing mold,...
Our customer purchased their home, and a few weeks after moving in their sump pump failed. The issue was caused by the float getting hung up in the...
Job Stories From Keswick, ON
Crack Repair in Keswick, ON

Amanda and Shaun O. found that their finished basement began to leak resulting in damage to the floors and their children’s toys. To rid themselves of the wet basement, they contacted Clarke Basement Systems for the best solution available.

The solution included the use of our patented FlexiSpan® Crack Repair System. This system efficiently and effectively sealed the cracks which allowed the floors to stay dry while bringing a 25-year warranty along with it.

Amanda and Shaun no longer have to worry about a wet basement floor or wet toys. Clarke Basement Systems is pleased to have been able to assist these Keswick, ON homeowners with all of their waterproofing needs.

Crack Repair in Keswick, ON - Photo 1Crack Repair in Keswick, ON - Photo 2Crack Repair in Keswick, ON - Photo 3Crack Repair in Keswick, ON - Photo 4
Eliminating Mould in a Keswick, ON Cottage

Pam B.noticed some musty smells and mould in the basement of her cottage. Realizing that leaving the cottage in these conditions would deem it as an unliveable, unusable space, Pam contacted Clarke Basement Systems looking to rectify the issue.

The best possible solution included the use of our patented WaterGuard® Below-Floor Drain, CleanSpace® Basement Wall Vapour Barrier, SuperSump® Premier Sump Pump System and UltraSump® Battery Back-Up System. These basement systems worked symbiotically to effectively and efficiently brighten the space, protect the basement from unwanted water by giving it a drainage passageway to escape the house, as well as ensure the best defence in any situation including a power outage. Ultimately the installation of these systems helped us attain the end goals that the customer had in mind, including making her cottage a pleasant and liveable space once more.

Rest assured, Pam B. no longer has to worry about a mouldy, musty smelling cottage. She can once again enjoy this space with her family. Clarke Basement Systems is pleased to have been able to assist this Keswick, ON homeowner with achieving a healthy and liveable cottage.

Eliminating Mould in a Keswick, ON Cottage - Photo 1Eliminating Mould in a Keswick, ON Cottage - Photo 2Eliminating Mould in a Keswick, ON Cottage - Photo 3Eliminating Mould in a Keswick, ON Cottage - Photo 4Eliminating Mould in a Keswick, ON Cottage - Photo 5
Sump System Upgrade in keswick, ON

Layton. H, a homeowner in Keswick, ON, had a working sump pump that was extremely active. He would hear it pumping water through all hours of the day! He was worried that if there were a power outage, his basement would flood. To ensure that all his belongings in his basement didn’t get ruined from water damage, he began investigating how to prevent his sump pump from stopping. One of the options that arose was to get a generator for his home, but that was too expensive. He then stumbled upon Clarke Basement Systems and our reliable backup battery system. After reading our company reviews and learning more about all our patented products on our website, he called to book an inspection.


Chris Luke, System Design Specialist, put a plan together to prevent the sump system from ever potentially failing as well as prevent water buildup from frozen discharge lines. Mark Dougherty installed our TripleSafe™ Sump Pump System that not only discharges 8,328 litres of water per hour but if the primary sump pump fails, the second pump turns on and can discharge an additional 14,763 litres of water! This system is also equipped with the Long-Lasting UltraSump® Battery Backup System which can pump more than 43,532 litres on a full charge! Mark also installed our IceGuard® Discharge line to prevent any buildup of water if the discharge lines freeze in the winter.


Layton can sleep well knowing that his new sump system will never fail and water will always be pumped out during the winter time.


Sump System Upgrade in keswick, ON - Photo 1Sump System Upgrade in keswick, ON - Photo 2
Work Requests From Keswick, ON
Vicinity of Whitestone Dr in Keswick
My garage floor has sunk and it needs to be fixed
Vicinity of Ferncroft Dr in Keswick
Hi, We have a crack in our foundation that we would like someone to look at. Thanks
Vicinity of Tampa Dr in Keswick
Q. How soon can you get here for an estimate? C. As my basement wall is slowly seeping water into my finished basement. My weeper on one side is backing up.
Vicinity of Bayview Avenue in Keswick
The crawl space is approximately 21" from the dirt floor to the bottom of the joists. The home is an 1100 sq/foot bungalow. The space is wet, dirty and restrictive. We are looking to potentially get duct-work installed and are interested in seeing our options to encapsulate and/or improve the current space.
Vicinity of Beverley Drive, in Keswick
I have an uninsulated crawl space.
Vicinity of Gwendolyn Blvd in Keswick
I need a quote for Underpinning in my crawlspace.
Vicinity of Wolford Crt in Keswick
Our house is 9 years old. We have a basement leak when it rains heavily. Would appeciate a call at the earliest. Thanks.
Vicinity of Cooks Bay Dr. in Keswick
Excessive Humidity in the home (800sq.ft.)
Vicinity of B Metro Rd N in Keswick
Need estimate for sunk and cracked garage floor
Vicinity of Lancaster Crt in Keswick
Seeing some seepage in one corner of the basement.
Vicinity of Church Street in Keswick
Found a small crack running down the foundation of my home behind the drywall after pulling up the carpet and finding slight water damage
Vicinity of Broadview Av in Keswick
Crack in foundation
Vicinity of High Gwillim Drive in Keswick
I have a cottage that has a mouldy basement. It needs to be totally restored!
Vicinity of Lakeview Blvd in Keswick
Rotted wood (beam) on east side of house, not sure how much rotted wood is above that. Not sure if Rim Joist are damaged would need to take a look in the crawl space. Look forward to hearing from you
Vicinity of Parkway Ave in Keswick
Water coming in at point where slab meets foundation. Appears to be small crack along this joint about 2' long.
Vicinity of Highfield Cres in Keswick
Recently installed new windows and have had some water issues with 2 window wells. Had some water leaking through, so I would like to have the window wells examined and serviced.
Vicinity of Garden Ave in Keswick
Water issues in the crawl space. Uneven flooring due to possible insuffient supports
Vicinity of Shetland in Keswick
We have a vertical crack in the corner of our foundation that we would need repaired. Our preference is to complete the repair from the interior.
Vicinity of Walter Drive in Keswick
I am looking for a quote to fix a ground water issue in my basement.
Vicinity of Garden Avenue in Keswick
Just looking to get an quote on repairing our foundation, it's crumbling in certain areas and shifts quite a bit and fixing our crawl space as it's just a mud pit with pockets of water.
Serving the following Keswick, ON postal codes
L4P 0A1, L4P 0A2, L4P 0A3, L4P 0A4, L4P 0A5, L4P 0A6, L4P 0A7, L4P 0A8, L4P 0A9, L4P 0B1, L4P 0B2, L4P 0B3, L4P 0B4, L4P 0B5, L4P 0B6, L4P 0B7, L4P 0B8, L4P 0B9, L4P 0C2, L4P 0C3, L4P 0C4, L4P 0C5, L4P 0C6, L4P 0C7, L4P 0C8, L4P 0C9, L4P 0E1, L4P 0E2, L4P 0E5, L4P 0E6, L4P 0E7, L4P 0E8, L4P 0E9, L4P 0G1, L4P 0G2, L4P 0G3, L4P 0G4, L4P 0G5, L4P 1A1, L4P 1A2, L4P 1A3, L4P 1A4, L4P 1A5, L4P 1A6, L4P 1A7, L4P 1A8, L4P 1A9, L4P 1B1, L4P 1B2, L4P 1B3, L4P 1B4, L4P 1B5, L4P 1B6, L4P 1B7, L4P 1B8, L4P 1B9, L4P 1C1, L4P 1C2, L4P 1C3, L4P 1C4, L4P 1C5, L4P 1C6, L4P 1C7, L4P 1C8, L4P 1C9, L4P 1E1, L4P 1E2, L4P 1E3, L4P 1E4, L4P 1E5, L4P 1E6, L4P 1E7, L4P 1E8, L4P 1E9, L4P 1G1, L4P 1G2, L4P 1G3, L4P 1G4, L4P 1G5, L4P 1G6, L4P 1G7, L4P 1G9, L4P 1H1, L4P 1H2, L4P 1H3, L4P 1H4, L4P 1H5, L4P 1H6, L4P 1H7, L4P 1H8, L4P 1H9, L4P 1J1, L4P 1J2, L4P 1J3, L4P 1J4, L4P 1J5, L4P 1J6, L4P 1J7, L4P 1J8, L4P 1J9, L4P 1K1, L4P 1K2, L4P 1K3, L4P 1K4, L4P 1K5, L4P 1K6, L4P 1K7, L4P 1K8, L4P 1K9, L4P 1L1, L4P 1L2, L4P 1L3, L4P 1L4, L4P 1L5

our service area