Epoxy garage floor systems, five steps, none skipped.

Most coating failures in Niagara garages are prep failures, not product failures. A floor that delaminated after two years almost always went down over contaminated concrete. That does not happen when the prep is done correctly. A full epoxy system is five steps and none of them get skipped.

The five steps

The concrete surface is opened with a diamond cup grinder, removing laitance, old paint, oil contamination, and the thin burnished skin that prevents epoxy from bonding. No scarifier, no acid etch: diamond grinding is the only prep that works long-term on Niagara's salt-contaminated floors.

Cracks are routed and filled with polyurea joint filler that flexes with the slab; spalled areas are ground back and patched level. A coated floor looks worse over an unrepaired crack, since the crack telegraphs back through within a season.

A moisture-tolerant solids-based epoxy goes down as the base coat, penetrating the open profile from the grind and giving the flake layer something to anchor to. Vinyl colour flake chips go into the wet base coat at full broadcast, adding both the visual finish and grip. A clear polyurethane top coat seals the flake layer and protects against fuel spills, oil drips, and daily wear; a UV-stable formula prevents yellowing.

Cure time and installation season

A full epoxy system needs a full day before light foot traffic and several days before parking a vehicle, meaningfully slower than a polyaspartic system's same-day turnaround (see the polyaspartic coating guide for the sourced comparison). A full epoxy system also generally needs mild, above-room-temperature conditions to cure properly, which limits installation to the warmer months in Niagara.

Who is licensed to do the work

Skilled Trades Ontario's Floor Covering Installer trade page describes installing, replacing and repairing floor coverings such as carpeting, vinyl, resilient tile and sheet flooring, with no mention of epoxy or concrete coatings. The Painter and Decorator trade page describes applying decorative and protective finishes, also with no mention of floor coatings or epoxy. Neither Ontario Regulation 876/21's compulsory-trade list names epoxy garage-floor coating as its own trade; no certificate of qualification is legally required for this work.

Isocyanate safety, and whose responsibility it is

A full epoxy base coat and a polyaspartic or polyurethane top coat are cured by different chemistry with different hazard profiles. Isocyanates are a designated substance under Ontario's Occupational Health and Safety Act regime; Ontario Regulation 490/09 requires an employer to use engineering controls, work practices, and hygiene practices to keep a worker's airborne exposure at or below the occupational exposure limit. This is an installer-side employer-and-worker obligation, not a homeowner-facing disclosure duty; no Ontario source found requires an installer to disclose it to the homeowner.

What a written estimate should include

Under the Consumer Protection Act, 2002, a supplier who gives a written estimate cannot charge more than 10 per cent over it without the consumer's agreement to a documented change. A WSIB clearance certificate is a weaker test for home garage-floor work than it looks: a business that only does home repairs or renovations on private residences, hired and paid directly by the homeowner, does not need to be covered by WSIB at all; ask for the clearance, but treat its absence as a question rather than automatic disqualification, and confirm liability insurance separately.

No verified Niagara or Ontario figure for what this work costs exists in any government, association or other authoritative source, so this guide publishes none. The way to learn what a job costs is a written, itemized quote from a local installer, and a second one itemized the same way so the two can be compared line by line.