Can New Brunswick concrete be ground smooth?

Yes, concrete in New Brunswick can absolutely be ground smooth — concrete grinding is a well-established process used to level uneven slabs, remove surface defects, and create a polished or honed finish on floors, garage slabs, and basement floors.

Concrete grinding uses diamond-tipped tooling mounted on walk-behind or ride-on grinding machines to mechanically abrade the surface. The process can range from a light pass to remove surface imperfections and high spots, all the way to a full polishing sequence using progressively finer grits (typically 30-grit through 3,000-grit) to achieve a mirror-like polished concrete floor. The result depends entirely on how many grinding passes are done and how far through the grit sequence you take it.

What Grinding Is Commonly Used For in NB

Floor levelling is one of the most practical applications. Older NB homes — especially those built before the 1970s — often have basement slabs that have settled unevenly due to frost heave, soil movement, or original poor placement. Grinding down high spots before installing flooring (LVP, tile, or epoxy coatings) is far less disruptive than replacing the slab. If the low spots are the problem rather than the high spots, self-levelling underlayment is used in combination.

Garage floor preparation is another common use. Before applying an epoxy or polyaspartic coating — both popular choices for NB garages — the surface must be mechanically prepared. Grinding opens the concrete's pores and creates the profile the coating needs to bond properly. Acid etching alone is often insufficient for quality coatings, and professional applicators in NB will grind before coating as standard practice.

Polished concrete floors are increasingly popular in NB commercial spaces, retail environments, and modern home renovations. A properly polished concrete floor is dense, durable, and easy to maintain — and it performs well in NB's climate because there's no coating to peel or delaminate under freeze-thaw stress (for interior applications).

NB-Specific Considerations

The condition of the existing concrete matters enormously. NB's freeze-thaw cycles cause spalling and surface scaling on older exterior slabs, and grinding a heavily spalled surface can expose aggregate and voids that make a smooth finish difficult or impossible to achieve. Interior slabs in good structural condition grind beautifully. Exterior concrete that has suffered significant freeze-thaw deterioration may need resurfacing or replacement rather than grinding.

For any grinding project, the concrete should be at least 28 days old and fully cured. Newly poured concrete is too soft for grinding and the surface paste hasn't fully hardened.

Dust control is a real consideration — concrete grinding produces significant silica dust, which is a serious respiratory hazard. Professional grinders use wet grinding methods or industrial vacuums with HEPA filtration. If you're renting a grinder for a small DIY project, a proper N95 or P100 respirator and dust collection are non-negotiable.

DIY vs. Hiring a Pro

Light grinding to knock down a few high spots on a small area is manageable as a DIY project — angle grinders with diamond cup wheels are available at NB tool rental shops for around $50-$80 per day. For anything larger than a few square feet, a walk-behind planetary grinder is the right tool, and those run $150-$300 per day to rent.

For polished concrete, garage floor coating prep, or levelling a full basement slab, hire a professional. The equipment, tooling knowledge, and technique required to achieve a consistent result across a large area take experience to execute well.

Need help finding a concrete grinding or floor coating professional in New Brunswick? Browse contractors through the New Brunswick Construction Network directory at newbrunswickconstructionnetwork.com/directory?trade=concrete.