Concrete garage floors and pads in Cambridge
Bearing on rock changes the foundation-depth question for a Cambridge slab, but it does not change the coating question at all. Whether the slab bears on bedrock or ordinary fill, no vapour barrier means the concrete stays in direct contact with whatever moisture sits beneath it. Coat that slab without testing it, and the moisture trapped underneath does not disappear, it surfaces later as a blister, which is the leading reason a garage floor finish eventually lifts.
Think of epoxy and polyaspartic as covering two different jobs rather than two versions of one job. Epoxy is slower to cure yet can be built as a moisture-managing base coat; polyaspartic cures within a day, wears far better against hot tires, and holds colour longer under sunlight than epoxy does alone. Most Cambridge floors we build pair the two, so the base handles what is rising from below while the faster topcoat takes the actual traffic.
Heat is the trigger behind hot-tire marks. A tire warms as it drives, plasticizers migrate to the rubber's surface, and a coating that has not fully cured absorbs and bonds with them right at the tire path. The remedy is simply time: hold off parking until the coating has genuinely finished curing, not just dried on top.
Fibre goes through the entire pour to control ordinary shrinkage, and rebar gets added specifically at the two spots that actually need it: over disturbed fill left from the house's foundation dig, and under the footprint of a vehicle lift. None of that changes because Cambridge sits partly on bedrock, only the excavation does. Winter does not spare an unheated attached garage here either, since it tracks the same outdoor swings an open driveway feels, and tire-borne salt lands on one narrow strip of floor near the door instead of spreading across a wider surface, so the concrete underneath is built to the same standard as our concrete driveways. Explore our concrete garage floors portfolio, or see everything we build across Cambridge.
A Kitchener or Guelph garage slab sits on moraine sand rather than rock, and the coating decision still comes out identical, which is rather the point. Concrete garage floors in Kitchener and garage floor coating in Guelph start from the same moisture test we run here.
The detached laneway garages on London's century streets bring an access problem as much as a concrete one, dealt with on garage floor concrete in London.