SALT, SLUSH AND COLD SLABS.

What road salt does to bare concrete

Road salt keeps GTA roads safe in winter, and it rides into garages on tyres and wheel wells. Salty meltwater soaks into porous concrete and can refreeze inside it. As one de-icer manufacturer puts it, concrete that lacks the strength to withstand that pressure “may spall or scale”: the top layer flakes away. The same manufacturer advises against using its de-icers on concrete less than a year old or already chipped, cracked or spalled.

Chlorides from salt can also travel down to any steel reinforcement in the slab over time and contribute to corrosion.

How a coating helps

A continuous, properly bonded coating keeps salty water on the surface where it can be cleaned off, instead of letting it soak into the concrete. That only works if the coating is intact, so the edges, joints, cracks and the garage door threshold are where care in installation pays off.

Winter habits that protect any garage floor

• Squeegee or mop salty slush out rather than letting it dry on the floor
• Sweep up sand and grit, which acts like sandpaper under tyres
• Use mats or a containment mat under the car if slush builds up
• Rinse the floor occasionally through winter and give it a proper clean in spring

Cold garages and installation timing

Floor coatings cure by chemical reaction, and their technical data sheets specify minimum air and surface temperatures, plus a margin above the dew point so moisture doesn't condense on the slab. As an example, one widely sold floor epoxy's data sheet lists a minimum ambient temperature of 10 °C and a slab at least 3 °C above the dew point; some polyaspartic data sheets list minimum surface temperatures closer to 4 °C. An unheated garage in a GTA winter can fall below those limits. A winter install may need temporary heating and a longer cure, or a date in a milder stretch. Ask any contractor to show you the data sheet for the product they propose and how they'll meet it on your install date.