Salt is the thing that destroys Canadian garage slabs, and most people do not realise a coating is genuinely protective rather than decorative.
Salt Is the Actual Enemy
Road brine and magnesium chloride come home on every wheel well from November to March, drip off, and soak into bare concrete. Once inside the slab, salt lowers the freezing point of trapped water and dramatically increases the number of freeze-thaw cycles the concrete goes through each winter. Each cycle expands water inside the pores and pushes the surface apart. That is what causes the spalled, crumbling patches near the garage door on almost every ten-year-old Okanagan garage.
A Coating Is Slab Protection
This reframes the whole purchase. A sealed floor keeps salt at the surface, where it mops off, instead of letting it into the concrete. People buy a coated garage floor because it looks good, and it does, but it is also the cheapest way to stop a slab degrading, and re-pouring a garage slab costs several times what coating it does.
Grip When the Floor Is Wet
A Canadian garage floor spends the winter with meltwater pooled under the vehicles. A smooth, high-gloss coating in that state is genuinely dangerous, especially at the step into the house where people carry things. Broadcast texture, flake or fine aggregate, provides mechanical grip that does not fade as the topcoat wears, which is why we push flake over solid colour for any garage in a snow region.
Hot Tire Pickup Still Applies in Winter
People assume hot tire pickup is a summer problem. It is not. A twenty-minute highway run puts real heat into a tire even at -5°C, and a thin coating in a cold garage is more brittle, not less. The answer is the same year-round: adequate film thickness, full cure before parking, and a polyaspartic topcoat.
Installing During a Canadian Winter
Epoxy effectively stops curing around 10°C, which puts unheated garages out of range for much of the year. Polyaspartic cures down to about 0°C, which keeps heated garages workable year-round and extends the shoulder season for unheated ones. For a cold detached garage the options are temporary heat held through the full cure window, or scheduling April to October.
What to Do Before the First Snow
If the slab is already spalling, coating over it does not stop the underlying damage. The damaged surface layer has to be ground back and rebuilt first. That is a real repair, and it is why a September quote on a spalled floor comes in higher than the neighbour paid on a clean one. Getting it done before winter means the slab stops taking on salt for another season.
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