A commercial slab that's out of tolerance stops finish flooring cold. Tile lippage, plank gaps, coating inconsistency, these aren't installer mistakes, they're slab problems. Oshawa Concrete applies self-leveling underlayment over the existing slab to bring it to the flatness your finish requires. Prime, pour, level, cure, then your tile, plank, polish or coating goes down right. Free written estimate, firm schedule.
A finish flooring installer can only work with what's underneath. If the slab is wavy, high in one corner and low in another, or has soft spots, no amount of skill in laying tile or plank will hide it. The finish will show every deviation. Self-leveling concrete fixes the slab first, so the finish can do its job.
We measure the existing slab across its full area, identify the high and low points, calculate the depth needed to bring it to your finish's tolerance, and pour a bonded self-leveling underlayment to that target. The result is a flat, stable base that meets the finish installer's spec.
We take elevation readings across the floor to map high and low spots, determine the target depth for your finish's tolerance, and confirm the plan with your finish-flooring contractor before we start.
Prepare the substrate
The existing slab is diamond-ground to remove coatings, contaminants and surface laitance, exposing clean concrete. A bonded primer is then applied to ensure the self-leveling material adheres fully.
Mix and pour
Self-leveling material is mixed to the manufacturer's water ratio, poured to the calculated depth, and gauge-raked to distribute it evenly. The material flows and self-levels to a flat plane within minutes.
Cure and verify
The pour cures on the manufacturer's schedule. We verify the finished surface against your finish-flooring's tolerance spec and hand the slab back ready for tile, plank, polish or coating installation.
Coordination with finish trades
Self-Leveling Works Best When Scheduled Early
The strongest projects schedule self-leveling as part of the build sequence, not as an emergency fix. We coordinate with your tile, plank, polish or coating installer from the start, agree on the target flatness, and pour to that target. This prevents surprises and keeps the schedule tight.
Tolerance specs, primer systems, depth ranges and when to self-level before finishing.
Each finish has its own tolerance, large-format tile is more demanding than plank, polished concrete more than tile. The finish installer's spec defines the target; we pour self-leveling to meet that target, and we will get the spec from your finish-flooring trade up front.
Yes, modern self-leveling systems can be poured at a thin overlay depth for minor tolerance corrections, up to several inches for major fixes. The system spec changes with depth; we use the right one for the pour.
Always. The primer is what bonds the new pour to the existing slab; without it, the self-leveling delaminates over time. We use the manufacturer-matched primer for the system, applied to a diamond-ground substrate.
Foot traffic typically within hours, but finish flooring usually waits longer for the pour to cure and dry. We give the finish-flooring trade the cure timeline so they can schedule their install.
Cost and disruption. A self-leveling overlay corrects the existing slab without tear-out, in a fraction of the time and budget. Where the existing slab is structurally failing rather than just out-of-tolerance, a new slab is the right call; we will tell you which case yours is.
Client reviews
What Oshawa Operations Say About Their Self-Leveling Pours
Tile contractor had refused to install on our out-of-tolerance slab. Self-leveling pour brought it to spec inside three days; tile install went perfectly after that. Fixed the actual problem.
W. V.
Construction Manager, Oshawa
★★★★★
Coordinated with our polished-concrete trade from day one. Target tolerance agreed, pour hit it, polish came out flawless. Real trade coordination, not just a contractor.
Z. V.
Retail Build-Out Director, Toronto
★★★★★
Existing slab had two inches of variation across the floor. Self-leveling brought it flat, finish coating installer was thrilled. Cost a fraction of a new slab pour.
Y. V.
Property Manager, Brampton
★★★★★
They were honest that part of our slab needed structural repair, not just self-leveling. Did both in sequence. The honesty was worth the slightly bigger scope.
Q. X.
Healthcare Facility Director, Mississauga
From the blog
Concrete Guides & Articles
Practical reading on planning, finishes and caring for concrete in Oshawa.
Tell us the floor area, the target finish flooring and its tolerance spec, and we will assess the existing slab and quote the self-leveling pour in writing.
