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A Free Estimate!
Reviews From Unionville
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 Unionville
Pool Deck Lift in Markham

Pool Deck Lift in Markham

Before After
Pool Deck Lift in Markham Pool Deck Lift in Markham

Lift of a pool deck where some of the slabs had settled as much as 2", creating trip hazards and undue stress on the pools coping. We injected our hydrophobic polymer which removed the trip hazards, alleviating the stress on the coping.

Pool Deck Leveling in Markham

Pool Deck Leveling in Markham

Before After
Pool Deck Leveling in Markham Pool Deck Leveling in Markham

Lift of a pool deck where some of the slabs had settled as much as 2", creating trip hazards and undue stress on the pools coping. We injected our hydrophobic polymer which removed the trip hazards, alleviating the stress on the coping.

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 Unionville, ON Foundation Repair & Basement Waterproofing Contractor

I will recommend Clarke Basement Systems to all my friends...
Happy Customers Surrounding Unionville, ON
Work Requests

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

Basement Waterproofing & Crawl Space Repair in Unionville, 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, our trained experts are available to permanently fix the problem.

We will properly install a hidden drainage system in your Unionville 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 Unionville

Foundation problems destroy your Unionville 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 Unionville 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.

We Fix
  • Cracked Driveways
  • Uneven Patios
  • Sinking Sidewalks      

  • Uneven Concrete
  • Sunken Pool Decks
  • Highway & Commercial Issues
News & Events From from Unionville
Waterproofing your basement keeps it dry and warm and creates a healthier environment in your home. Before you finish your basement, you should make sure it is waterproofed to avoid damage to your floor, walls, furniture and belongings.... [Read more]
Work Requests From Unionville, ON
Ritter Crescent in Unionville
Looking for a window well solution for one or more windows. Currently have steel window wells. Top of basement windows is ca. 7 inches above grade. Windows are fine, replaced 2014, but I am looking for a better solution than the MacCourt product sold at Lowes, Home Depot and Rona.
Basswood Hollow in Unionville
Looking for estimate on foundation wall. Referred by word of mouth. Appointment set.
Pinebrook Hollow in Unionville
Requesting an moisture in the foundation with wt stains at the bottom. Referred by contact in the past. Appointment set.
Foxmeadow Lane in Unionville
Patterned concrete sinking by front steps. This issue is getting progressively worse over the last few years. This year visitors have trouble stepping on the front stairs leading up to the front door. Need it assessed. Thank you Craig & Marsha Winsor
Carlton Road in Unionville
Mould built up at foundation joint. Damp basement. Suspect high water table
Serving the following Unionville, ON postal codes
L3P 1W9, L3P 3J3, L3P 3M2, L3P 4H1, L3P 5E4, L3P 5E5, L3P 6V2, L3P 6V3, L3P 6V4, L3P 7B5, L3P 7B6, L3P 7B7, L3P 7B8, L3P 7B9, L3P 7C1, L3P 7C2, L3P 7C3, L3P 7C4, L3P 7C5, L3P 7C6, L3P 7C7, L3P 7C8, L3P 7C9, L3P 7E1, L3P 7E2, L3P 7E3, L3P 7E4, L3P 7E5, L3P 7E6, L3P 7E7, L3P 7E8, L3P 7E9, L3P 7G1, L3P 7G2, L3P 7G3, L3P 7G4, L3P 7G5, L3P 7G6, L3P 7G7, L3P 7G8, L3P 7G9, L3P 7H1, L3P 7H2, L3P 7H3, L3P 7H4, L3P 7H5, L3P 7H6, L3P 7H7, L3P 7H8, L3P 7H9, L3P 7J1, L3P 7J2, L3P 7J3, L3P 7J4, L3P 7J5, L3P 7J6, L3P 7J7, L3P 7J8, L3P 7J9, L3P 7K1, L3P 7K2, L3P 7K3, L3P 7K4, L3P 7K5, L3P 7K6, L3P 7K7, L3P 7K8, L3P 7K9, L3P 7L1, L3P 7L2, L3P 7L3, L3P 7L4, L3P 7L5, L3P 7L6, L3P 7L7, L3P 7L8, L3P 7L9, L3P 7M1, L3P 7M2, L3P 7M3, L3P 7M4, L3P 7M5, L3P 7P4, L3P 7P5, L3P 7R6, L3P 7R7, L3P 7R9, L3P 7S1, L3P 7S2, L3P 7S3, L3P 7S4, L3P 7S5, L3P 7S6, L3P 7S7, L3P 7S8, L3P 7S9, L3P 7T1, L3P 7T2, L3P 7T3, L3P 7T8, L3P 7V7, L3P 7V8, L3P 7W1, L3P 7X9, L3P 7Z2, L3P 7Z3, L3P 8E1, L3R 0A4, L3R 0A5, L3R 0B5, L3R 0C6, L3R 0G1, L3R 0G2, L3R 0K6

our service area