How long does it take to level a concrete slab floor?

DIY leveling can take 1-3 days depending on the method and area size, while professional services often complete in 1 day for small projects.

What causes uneven concrete slabs in Toronto?

Frost heave from freezing winters, soil settlement, and poor initial pouring are common causes in Toronto's climate.

Can I apply epoxy over an unleveled slab?

No, uneven slabs lead to epoxy peeling and failure; always level first for best results.

How much does professional concrete leveling cost?

In Toronto, costs range from $5-$15 per sq ft, depending on method and slab condition.

Is self-leveling compound suitable for garages?

Yes, it's ideal for minor unevenness in garages, providing a smooth base for coatings.

What tools do I need for DIY concrete leveling?

Basic tools include a laser level, grinder, trowel, mixing bucket, and self-leveling compound.

How to prevent future unevenness in concrete slabs?

Improve drainage, use proper sub-base, and consider insulation to mitigate frost heave.

How to Level a Concrete Slab Floor: DIY & Pro Methods (2026)

Step-by-step guide to fix uneven concrete slabs in Toronto garages, basements, and warehouses. Self-leveling, grinding, and patching — with tools, costs, and local frost-heave tips.

Call (647) 284-6202

Why Level Your Concrete Slab Floor?

Uneven slabs cause cracks, water pooling, and coating failures. In Toronto, frost heave and soil settlement worsen dips over time.

•Prevents Epoxy Peeling: Flat surface = long-lasting garage floor epoxy.
•Stops Water Damage: Eliminates low spots where moisture collects.
•Safety & Code Compliance: Required for commercial and residential renos.

Learn more in our slab preparation guide.

How to Level Concrete Slab Floor: Full Process

1
Assess the Slab: Use laser level across entire floor. Mark high/low spots.
2
Grind High Spots: Use 7" diamond cup wheel. Dust control mandatory.
3
Patch Deep Cracks: Fill with polymer-modified repair mortar.
4
Prime & Pour Leveler: Apply bonding primer. Pour self-leveling compound in 25 sq ft sections.
5
Final Grind & Seal: Light grind after 24 hrs. Seal with densifier.

For slabs over 1" out of level, consider mudjacking. See our advanced finishing options.

Tools & Materials Needed

•Tools: Laser level, concrete grinder, mixing paddle, spiked shoes, gauge rake
•Materials: Self-leveling underlayment (Ardex, Mapei), primer, crack filler
•Safety: HEPA vacuum, N95 mask, knee pads

Rent tools locally or use our DIY leveling kits.