5 Common Questions About Concrete & Floating Slabs in Ontario

Homeowners often ask what kind of foundation is best for their garage, addition, or small structure. Here are the most frequent questions about concrete and floating slabs we hear from clients in Toronto, Aurora, and Newmarket.

1. What’s the difference between a regular concrete slab and a floating slab?

A regular concrete slab includes footings poured below frost depth for strength against shifting.

A floating slab sits on compacted gravel and insulation, providing a stable surface at a lower cost — ideal for garages or additions without basements.

Ontario Concrete Inc. builds both, ensuring proper support based on soil and load conditions.

2. How thick should a garage or addition slab be?

Most residential slabs in Ontario are 4–6 inches thick, with reinforced edges or thickened footings where necessary. Heavy‑use slabs (like driveways or garages) may need 6–8 inches, steel mesh, or rebar reinforcement.

3. How much does a floating slab cost in the GTA?

The average cost ranges from $12–$20 per square foot, depending on access, excavation, reinforcement, and finishes.

Ontario Concrete does the best price for slab projects — offering transparent quotes up to 20% lower than any competitor’s written estimate.

4. Can you add radiant heating or plumbing lines to a concrete slab?

Yes! Many clients in Toronto and Aurora choose radiant in‑floor heating for comfort and efficiency. We embed PEX tubing during the pour and ensure proper insulation layers below the slab.

5. How long do concrete slabs last?

With correct reinforcement, drainage, and sealing, a properly built slab can last 50 years or more. Ontario Concrete Inc. uses premium concrete mixes rated for Ontario’s freeze‑thaw cycle, meaning your slab resists cracking and moisture infiltration long‑term.

Turn Your Groundwork Into Great Work

Every sturdy structure depends on a perfect foundation. Let Ontario Concrete Inc. handle your concrete slab or floating slab project anywhere in the Toronto GTA, Aurora, or Newmarket.

💥 We beat up to 20% off any written price — guaranteed.