Calgary & Alberta
Surface Prep
Surface preparation determines whether an epoxy floor bonds for a decade or peels in one season. Most failures come back to one decision made before any coating was applied: how the concrete was opened up.
Before any primer, base coat, or Flake goes down, the concrete surface has to be mechanically opened to accept the coating. How that happens determines the strength of every bond above it. There are two methods used in the industry. One works. One does not work well enough for a floor that needs to survive Calgary winters.
Concrete surface profile, or CSP, is a standardized scale that measures the texture of a prepared concrete surface. It runs from CSP 1, which is nearly smooth, to CSP 10, which is heavily fractured aggregate. Epoxy coatings require a minimum of CSP 3 for reliable adhesion. That is roughly the texture of 40-grit sandpaper: enough mechanical tooth for the coating to grip, not so rough that you trap air bubbles under the film.
The surface profile is not cosmetic. It is the physical key that locks the coating to the concrete. A CSP 1 surface might hold coating in dry interior conditions, but under thermal cycling and moisture pressure it does not have enough contact area to maintain the bond.
Acid etching uses muriatic or phosphoric acid to chemically dissolve the calcium carbonate at the concrete surface, creating a slightly rough texture. On a clean, new, well-mixed slab it can approach CSP 2 in ideal conditions. On a typical garage slab with laitance, surface hardeners from the original pour, or any contamination at all, results vary significantly and are not verifiable without specialized measurement equipment.
Diamond grinding uses a planetary grinder with industrial diamond tooling to physically cut the concrete surface to a consistent profile. A properly set-up pass with the correct tooling produces a verified CSP 3 across the entire slab. The result is consistent regardless of the slab's existing condition, and it simultaneously removes laitance, hardeners, existing sealers, and surface contamination that would otherwise interfere with adhesion.
The grinder also reveals problems. Soft spots, delaminated sections, and areas with existing damage become immediately visible as the grind progresses. Those areas can be addressed before the coating goes down rather than discovering them after the topcoat has cured.
EFC Standard
We test moisture vapour emission on every slab using ASTM F2170-compliant in-slab probes. If the reading exceeds 4.5% relative humidity, we install a moisture vapour barrier before any coating goes down. It adds time and cost. It's also the only way to guarantee the system holds through Calgary winters.
Diamond grinding without proper dust extraction creates a fine concrete dust that re-settles on the very surface you just prepared. We run a two-stage HEPA vacuum system paired to the grinder on every pass. The vacuum has a jet-pulse self-cleaning filter that maintains suction as the filter loads, so capture efficiency stays consistent through the job. The slab comes out clean enough that contamination is not a factor when the primer goes down.
Ask what grinder they use and how they control dust. A planetary grinder with overlapping passes produces a consistent profile across the full slab, including edges and corners. Rotary grinders miss corners and leave a pattern in the surface. An oscillating tool is used for perimeter work where the main grinder cannot reach. If the dust plan is sweeping and a shop vac, the surface will have contamination when the coating is applied.
The difference in cost between an acid-etch prep and a diamond-grind prep is real. So is the difference in bond strength. A floor that delaminates in year two because of inadequate prep costs more to fix than the prep savings were worth. Get the surface right and everything above it performs as designed.
Get a quote on a properly installed floor — one that holds through Calgary winters.
