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How It Works2 min read

Can You Epoxy a Floor in Winter? (Okanagan Answer)

Yes, in a heated garage, year-round. In an unheated detached shop it depends entirely on which resin, and on the slab temperature rather than the air.

Slab Temperature, Not Air Temperature

This is the detail that catches people out. A garage can be 15°C in the air and have a 6°C slab, because concrete has enormous thermal mass and lags well behind the air around it. Resin cures against the slab. We take slab temperature readings with an infrared thermometer before committing to a product, not the reading off the wall thermostat.

Where Each Resin Stops

A 100% solids epoxy effectively stops curing around 10°C, below that it thickens, will not level, and may never fully cross-link, leaving a soft floor that fails later. Polyaspartic keeps curing down to roughly 0°C, and its catalyst ratio can be adjusted to compensate for the cold. That difference is what keeps our winter schedule open.

Heated Garages and Interiors: Year-Round

If a space holds above 10°C, it is a normal job in any month. Attached garages with a heat source, basements, commercial interiors and conditioned warehouses are all year-round work. In practice the winter is when we do most of our interior and commercial floors, because that is when those clients want the disruption.

Unheated Detached Shops

Two options. Bring in temporary heat. A properly vented construction heater, held above the product minimum for the entire cure window, not just during application. Or use a polyaspartic system rated for the actual slab temperature, which is often the more economical answer. What does not work is heating during the pour and letting it drop overnight; the coating cures on its own schedule, not ours.

The Humidity Problem Nobody Mentions

Cold weather brings a second issue: dew point. If the slab is colder than the dew point of the air in the room, a film of moisture forms on the surface, invisible, and completely destructive to adhesion. We check slab temperature against dew point before starting. The rule is a minimum 3°C margin above dew point, and if it is not there, we do not start.

Should You Wait for Spring?

If the space is heated, there is no reason to. If it is not, winter booking usually means better scheduling, spring and summer are when everyone calls at once, and a January enquiry for an April install typically gets the date it wants. Meanwhile a bare slab takes on another winter of salt, which is the argument for not waiting at all.

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