Fixing Out-of-Spec Slabs with Self-Leveling Concrete
A commercial slab that doesn't meet the flatness tolerance for your finish flooring becomes a problem for the tile, plank, or polish installer. Self-leveling concrete is the solution. Portland Concrete primes the existing slab, pours a self-leveling underlayment to the target depth, and delivers a flat surface ready for any finish. We coordinate the tolerance spec with your flooring trade before we pour. Free written estimate on every project.
Most Finish-Floor Problems Start with the Slab Itself
Lippage in tile, gaps between planks, roller marks in coating, inconsistent polish sheen, these issues get blamed on the finish installer, but the real culprit is usually a slab that was poured outside the flatness tolerance for that particular finish. No finish installer can make a wavy slab look flat. The slab has to be flat first.
Self-leveling concrete fixes the slab before the finish goes down. We diamond-grind the existing concrete to remove contaminants and old coatings, apply a bonded primer, pour the self-leveling underlayment to your target depth, and let it cure to the finish-flooring spec. The result is a slab that meets the tolerance requirement, which means the finish install succeeds.
How Portland Concrete Executes a Self-Leveling Pour
Measure and plan
We survey the existing slab to find high and low spots, determine the depth needed to reach the finish-flooring's tolerance, and confirm the plan with your tile, plank, or polish contractor before we schedule the pour.
Prepare the substrate
The slab is diamond-ground to expose clean concrete, all contaminants and failed coatings are removed, and a bonded primer matched to the self-leveling system is applied to ensure full adhesion.
Mix and pour
The 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 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 the finish-flooring tolerance, and the slab is ready for the next trade to begin their work.
Coordination with your flooring trade
Self-Leveling Works Best as Part of the Build Schedule
Self-leveling concrete is most effective when planned into the project timeline with the finish-flooring contractor, not added as an emergency fix. We coordinate the tolerance spec, pour depth, and cure timeline with the tile, plank, or polish installer from the start, so everyone knows what to expect.
On larger projects, we also coordinate with adjacent anti-slip flooring zones, decorative concrete areas, and any floor repair that needs to happen first. The goal is a seamless handoff from our pour to the finish installer.
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 Portland 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, Portland
★★★★★
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, Vancouver
★★★★★
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, Hillsboro
★★★★★
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, Gresham
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Practical reading on planning, finishes and caring for concrete in Portland.
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.
