Concrete Polishing in Ottawa & the National Capital Region - Diamond-Ground Densified Floor Professionals

Why Ottawa Properties Choose Polished Concrete

Polishing is a mechanical process. A rough concrete slab is stepped through progressively finer diamond grits until it reaches the sheen you specified. Nothing is coated on top of the slab. The floor you walk on is the concrete itself, hardened and dust-proofed by a lithium silicate densifier.

For retail units, showrooms, and warehouse space, a polished slab delivers a hard, reflective, low-maintenance surface with none of the peel-and-fail risk that a coating carries. Done right, it lasts the life of the slab. As Ottawa’s full-spectrum epoxy flooring contractor, we will tell you plainly when a polish beats a coating and when a retail showroom epoxy finish is the smarter call for your space.

Grinding is run on vacuum-attached machines (Lavina, HTC), with a densifier pass between grit steps. You pick the final sheen. Matte reads industrial, satin reads retail, and high-gloss reads premium showroom.

What’s Included

• Slab assessment and sheen selection with sample boards
• Multi-grit diamond grinding (4-7 passes depending on target sheen)
• Lithium silicate densifier application
• Polish to your selected sheen (matte / satin / high-gloss)
• Optional staining or dyeing for colour effect
• HEPA-filtered vacuum equipment for minimal dust during install
• Off-hours scheduling for retail and warehouse environments

How the Polishing Process Works, and How Long the Floor Lasts

The polishing process runs a strict grit progression that cannot be rushed without permanently compromising the outcome. Metal-bond diamond tooling opens the sequence at a coarse grit, usually 30 or 50, to flatten the slab, remove any existing coating or adhesive residue, and hit a Concrete Surface Profile of CSP 1 to 2 as defined by ICRI. Rush the passes or skip a grit and you leave sub-surface scratching that shows up under raking or directional light, especially on high-gloss finishes at the 1,500 to 3,000-grit level.

Once the coarse passes are done, a lithium silicate densifier is applied. The densifier penetrates the concrete matrix, reacts with free lime and calcium hydroxide in the paste, and forms calcium silicate hydrate crystals that fill the pore structure. That produces a measurably harder surface, typically 20 to 30% harder on a Mohs comparison test, along with a permanently dust-proofed floor. Sodium silicate densifiers are cheaper but leave a surface residue that can haze. Lithium silicate penetrates without residue, and that is why it is the professional standard for Ottawa commercial polishing.

Once the densifier has cured (typically 1 to 4 hours depending on ambient temperature and slab porosity), the sequence continues through resin-bond diamond pads at 100, 200, 400, 800, 1,500, and 3,000 grit, stopping at the specified sheen. A 400-grit matte stops early and reads well for warehouse and industrial floors in Nepean and Kanata industrial parks, where traction matters more than reflection. An 800-grit satin suits retail and commercial showroom space. High-gloss at 1,500 to 3,000 grit is specified for premium lobby floors and hospitality where light reflection is the priority.

Durability is the real long-term story. There is no coating to wear through on polished concrete. In moderate-traffic retail, a satin polish may show a bit of surface dulling in the busiest corridors after 5 to 7 years, which a single burnishing pass corrects rather than a full recoat. ASTM E303 slip-resistance testing on a properly maintained polished surface at 400-grit or higher typically clears the 0.42 Dynamic Coefficient of Friction (DCOF) threshold that ANSI A137.1 sets for commercial flooring. Wet-slip performance can be further improved with a penetrating silane/siloxane guard coat that leaves the sheen unchanged.

Polished Concrete vs Epoxy: Which One Fits Your Space

The single most common question we field from facility managers across the National Capital Region is whether polished concrete or an epoxy build is the right call. Four variables decide the answer honestly: what the floor must resist, how it will be maintained, what the ownership horizon looks like, and what the slab itself is telling you.

Polishing wins when the goal is a permanent, low-maintenance floor with a clean industrial or modern retail aesthetic. Retail units in Westboro and boutique showrooms along Bank Street routinely land on polished concrete at an 800-grit satin because the reflective slab amplifies natural light, drops lighting energy load, and asks for nothing more than a pH-neutral damp mop and an annual burnish. Nothing to peel, no recoat cycle to budget, no delamination if a forklift drops a pallet.

Epoxy builds, particularly broadcast polyaspartic, aliphatic polyurea topcoats, or chemical-resistant novolac systems, are the right pick when the floor sees regular chemical exposure, needs a vapour barrier, requires CFIA-compliant seamless sanitation, or when the owner wants specific colour and decorative aggregate. A Kanata warehouse handling industrial solvents needs a novolac epoxy rated for chemical immersion, not a polished slab. A Nepean food processor writing CFIA inspection needs a seamless urethane cement or epoxy build, not a bare-concrete surface that can harbour bacteria in micro-surface porosity. On residential garages, a broadcast polyaspartic with anti-slip aggregate outperforms polished concrete because it resists road salt, motor oil, and brake fluid far better.

Cost is a real differentiator. In the Ottawa market, polishing typically lands at $10 to $15 per sq ft depending on slab condition and target sheen. A comparable broadcast polyaspartic build runs $6.50 to $12 per sq ft, but includes colour, chip, and metallic options polishing cannot replicate. On lifetime cost, polishing usually pulls ahead in high-traffic commercial spaces because the 7 to 10-year recoat cycle drops out.

Concrete Staining, Dyeing, and Decorative Options

Grey is not the only option. Acid stains and water-based reactive dyes applied between grinding passes alter the colour of the concrete matrix itself rather than sitting on top as a coating would. The colour lives inside the slab, so it cannot peel, chip, or delaminate, because no film exists to detach. That matters across the Ottawa retail landscape, where a topcoat might telegraph scratches or wear lines inside a few years.

Acid staining uses a dilute hydrochloric acid solution carrying metallic salts. Ferric nitrate delivers amber and brown tones, cupric nitrate delivers blue-green, and sodium ferrocyanide delivers yellow. The acid opens the pore structure, the salts react with free lime in the cement paste, and the result is a permanent mineral colour that intensifies as additional polish passes are laid down. Colour range is limited to earth tones, browns, russets, greens, and golds, because the chemistry is grounded in naturally occurring mineral reactions. Restaurant and hospitality spaces in the ByWard Market and along Elgin Street lean acid stain when the patinated, aged look supports the design direction.

Water-based dye penetrates the pore structure without the acid step. That opens the palette wide. Any pigment that dissolves in a water-based carrier can be applied. Dye colours read more uniformly than acid stain, which is why they are the correct specification for corporate lobbies and branded retail environments in Kanata and Nepean where a specific Pantone or brand-matched colour is required. Water-based dyes go down after the initial coarse grinding passes and before the densifier, so the colour sits within the top 1 to 3 mm of the polished slab rather than on the surface. A clear guard coat or the lithium densifier locks the colour during subsequent passes.

A practical Ottawa note: dye application is sensitive to temperature and humidity. Applied below 10 degrees C or above 75% relative humidity, absorption goes uneven and produces blotchy colour instead of a uniform wash. That matters in retail units in Barrhaven and Orleans where the slab often sits at grade with limited climate control through winter. Ambient conditions are checked before scheduling dye work, and propane heat with dehumidifiers is used in shoulder seasons to hold the install window.

Related Questions Property Owners Ask

What is the per-sq-ft cost of concrete polishing

Most commercial polishing projects land between $10 and $15 per sq ft, driven by slab condition, grit count, and target sheen. A 5,000 sq ft warehouse in Nepean or Kanata polished to a 400-grit matte sits closer to $10 to $12 per sq ft. A premium 3,000-grit high-gloss lobby floor in a Rockcliffe Park commercial building can reach $13 to $15 per sq ft on additional diamond passes and longer labour time.

How long does the install take from start to finish?

A 3,000 to 5,000 sq ft commercial floor takes 2 to 4 days from coarse grind through final polish. The densifier pass needs a 1 to 4 hour cure window before grinding resumes, which adds time but is non-negotiable for a durable result. Larger warehouse work in Kanata or Nepean at 20,000 sq ft or more is typically scheduled across consecutive overnight or weekend shifts to protect operations, with each shift covering one to two grit stages.

Can polishing be done over a previously coated floor?

Yes, though it adds cost and time. Any existing epoxy, urethane, or VCT tile adhesive has to be ground or stripped off before diamond polishing starts. Shot blasting is often needed to reach the CSP 1 to 2 profile a clean polish requires. Depending on adhesive thickness and bond strength, additional 16 or 30-grit passes are needed before the standard progression begins. We assess this at the site walk and quote accordingly.

Do you seal the floor after the polish is finished?

The lithium densifier applied mid-process is not a topical sealer. It modifies the slab chemically rather than sitting on top. For most retail and warehouse settings, the densified and polished slab performs well without a topical guard. Where regular liquid spills, cooking oils, or de-icing salt tracked in from winter parking is a factor, a penetrating silane/siloxane guard coat is applied on top of the polished surface. Stain resistance improves without altering sheen or introducing a film that can scratch or delaminate.

Which slip standard does a polished slab meet?

Polished to 400-grit matte or 800-grit satin, a properly maintained slab typically meets or beats the 0.42 DCOF minimum ANSI A137.1 specifies for level commercial flooring when dry. Wet-surface DCOF drops at higher gloss, so a 3,000-grit high-gloss floor reads noticeably slippier when wet. For spaces where water or cleaning fluid is a factor, we recommend stopping at 800-grit or adding a penetrating grip additive. Ontario WSIB compliance requires that commercial flooring in food-service and industrial settings meet slip standards, and DCOF test results are provided on request for projects that need documentation.

in Ottawa & the National Capital Region, from small Westboro retail units to large-format Kanata distribution centres, we have polished slabs on every kind of building. Each project opens with an honest slab assessment and a straight conversation about whether polishing or a coated system is the smarter long-term investment for your facility.