Concrete garage floors and pads in Toronto
A Toronto garage slab poured on the city's clay and silt does not automatically have a moisture problem, but a slab poured without a vapour barrier between it and that ground can still keep releasing moisture upward for years, regardless of soil type. Leave the vapour barrier out and the concrete keeps a permanent line to whatever moisture sits in the ground below it. Coating that untested is the single most common reason a garage floor finish blisters and lifts, and it is worth checking on a city where a majority of the housing predates 1980.
Epoxy and polyaspartic each cover a different half of the fix. Standard epoxy cures slowly enough to be built into a real moisture barrier as a base coat; polyaspartic cures within a single day rather than days, and stands up to tire heat and sunlight far longer than epoxy manages alone. A correctly specified Toronto garage floor commonly pairs the two, using epoxy where testing shows moisture needs managing and polyaspartic to carry the actual wear.
It comes down to chemistry rather than pressure: heated tire rubber releases plasticizers that bond into an under-cured coating, leaving marks that look like staining but are really a bonding reaction at the tire path. There is no way around waiting for the full cure period before the car returns, regardless of the product used.
We reinforce every slab with synthetic fibre throughout. That same clay sits under the backfill wherever a slab spans the excavation from the house's original foundation, which is exactly where we add rebar rather than relying on fibre alone. And despite sitting under a roof, an unheated Toronto garage tracks outdoor temperature closely enough to see the same freeze-thaw swings as an open driveway, with salt concentrating at the door instead of spreading out, the same logic behind the mix in our concrete driveways. Our full concrete garage floors portfolio covers more of this, and our Toronto service area page covers the rest of what we build.
Clay is a Toronto detail, not the deciding one. Garage floors in Mississauga and polyaspartic garage floors in Oakville sit on different ground entirely and still come down to whether a barrier went in under the slab.