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Floors · Self-Leveling Underlayment
Uneven Slabs Made Flat in Laval
When a concrete slab dips, humps or settles unevenly, no finish sits right on top. Tile lippage, plank gaps, polish telegraphing, micro-topping cracks. Laval Concrete applies self-leveling compound to bring the slab into tolerance, creating a sound, flat substrate ready for whatever finish you choose. One pour, one cure window, one flat surface.
- Engineered bond to substrate
- Gravity-leveled, no shimming
- Free written estimate, firm timeline
The flatness problem
Why Substrate Flatness Breaks Finished Floors
A slab that looks level to the eye often isn't. Older concrete settles. Patched slabs have ridges. Plywood substrates flex. When a finish goes down on an uneven surface, the finish itself fails. Tile cracks at the low spots. Vinyl plank shows gaps. Polished concrete looks dull where the grinder couldn't reach the valleys.
Self-leveling compound solves this before the finish is installed. We prime the substrate with a product matched to its material, pour the leveler, and let gravity do the work. The compound flows to the lowest point, settles to a perfectly flat plane, and cures into a hard, bonded surface.
From that point forward, polished concrete, stained finishes, epoxy coatings, or micro-topping overlays all go down on a substrate that is actually flat. The finish performs as designed.
The sequence
How Self-Leveling Pours Get Done
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Measure and assess the substrate
We check moisture, identify high and low spots with a straightedge, and confirm the substrate is sound. We also determine which primer and self-leveling product match the substrate material.
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Prepare and prime the surface
Perimeter dams are set so the leveler stays where it should. The substrate is primed with the manufacturer-matched primer, which ensures chemical bond and prevents the leveler from drying too fast.
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Mix and pour to elevation
The self-leveling compound is mixed to the published water ratio, poured onto the primed substrate, and gently raked to the marked elevation. Gravity handles the actual leveling.
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Cure and finish preparation
The pour sets to walkable in hours and cures fully over the manufacturer's window. Once cured, the new surface is flat, sound, and ready for tile, plank, polish or any other finish.
Common applications
Renovation Floors, Tile, Polish & Micro-Topping
Renovation work is where self-leveling shines. Old slabs in older homes rarely meet modern flatness standards. Instead of tearing out and replacing, we level the existing slab and install the finish on top. The cost is a fraction of a full replacement and the result is indistinguishable.
It also sits under polished concrete when the slab has patches or minor settlement, under micro-topping when extra fill is needed for slope or elevation change, and under radiant heat underlayment as part of the thermal stack. The flatness is what every system above depends on to perform.
Related floor systems
Self-Leveling Works With Other Floor Finishes
Self-leveling underlayment is the prep layer that makes every other floor system possible. Explore the full range.
Polished Concrete Floors
Ground and polished to a hard, bright finish, no coating to peel.
Learn moreEpoxy Floor Coating
Seamless, chemical-resistant epoxy systems for shops, utility rooms and basements.
Learn moreStained Concrete Floors
Acid and water-based stains worked into the slab for warm colour.
Learn moreMicro-Topping
Ultra-thin overlay that lays a seamless new surface over dated concrete.
Learn moreHeated Floor Underlayment
Encases radiant heat tubing in underlayment before micro-topping or finish.
Learn moreCommon questions
Self-Leveling Underlayment Questions, Answered
When you need it, what it bonds to, thickness and finishes above in Laval.
Old kitchen slab was a wave. Self-leveling brought it dead flat and the tile went down without a single shim. The result looks like a brand-new build.
Polished the basement floor after a self-leveling pour. The polish was perfect because the substrate was actually flat for the first time.
Plywood substrate in our addition. They primed it properly and the leveler bonded so well I forgot it was on plywood. The plank floor sits perfect.
Heated floor underlayment plus self-leveling plus micro-topping plus polish. Whole stack done in sequence and the finished floor is dead flat with even radiant heat.
From the blog
Concrete Guides & Articles
Practical reading on planning, finishes and caring for concrete in Laval.
Ready to level
Get a Free Self-Leveling Quote
Tell us the substrate type, the finish you want above, and the room dimensions. We measure, calculate the pour, and send a written estimate within one business day.
We'll assess the slab and provide a written self-leveling quote within one business day.