Calgary & Alberta
Surface Prep
Both get lumped together as garage floor coatings, but they behave very differently and are used at different stages of a proper floor system. Understanding which is which helps you ask the right questions before any work starts.
These two products are often treated as competing options when they are really designed for different roles in the same system. Epoxy forms the structural base. Polyaspartic protects the surface. Using them correctly is the difference between a floor that holds up and one that looks good for one season.
Epoxy is a two-part resin system: a resin and a hardener that react when mixed. Once cured, it forms a rigid, high-build film that bonds tightly to concrete. That rigidity is its strength and its limitation. Epoxy handles compressive loads well and creates an excellent foundation for Flake broadcast and topcoat. It does not handle UV exposure or thermal movement as well, which is why it is used as a base coat rather than a surface coat.
Epoxy is also moisture-sensitive during application. If the slab has too much moisture vapour emission, the epoxy will not bond properly, and blistering appears within weeks. This is why moisture testing is non-negotiable before any epoxy application.
Polyaspartic is a type of polyurea, a family of fast-curing elastomeric coatings. It cures faster than epoxy, stays flexible through temperature changes, and resists UV degradation without yellowing. Those properties make it ideal as a topcoat over an epoxy and Flake base. It seals the Flake layer, adds gloss, provides chemical resistance, and is what you are actually walking on and driving on.
A complete floor system on a Calgary garage uses epoxy for its adhesion and film build, then polyaspartic for its durability and flexibility on the surface. Trying to do the entire system in one product means compromising somewhere. A single-coat polyaspartic goes down too thin to properly embed Flake. A single-coat epoxy topcoat yellows and cracks under UV and thermal cycling.
The layered approach takes longer but gives you a floor that actually performs. Base coat, Flake broadcast, topcoat one, topcoat two. That is the sequence we follow on every garage floor.
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.
Epoxy is not suitable for exterior concrete. It cannot handle UV exposure and it moves poorly with temperature. Polyaspartic handles both. For outdoor slabs like patios, pool decks, or exposed walkways, polyaspartic is the correct choice. It can also be applied in lower temperatures than epoxy, which matters for shoulder-season work in Calgary.
Ask specifically what products are being used at each stage: primer, base coat, Flake, topcoat. Ask how many coats of topcoat are included. A floor with one thin polyaspartic coat will not hold up the same as one with two properly applied coats. The price difference between a one-coat and two-coat finish often reflects in how the floor looks after the first winter.
If you are comparing quotes and one is significantly lower, look at the product breakdown. One-coat polyaspartic systems skip the epoxy base or skip the second topcoat. That is usually where the savings come from, and it is the part of the job that determines how long the floor holds up.
Get a quote on a properly installed floor — one that holds through Calgary winters.
