Garage floor coating questions, answered straight.

A properly prepped and installed system typically lasts 10 to 20 years on a residential garage floor. The prep is what determines that number, not the product. A diamond-ground, crack-filled floor with a proper base coat and polyurethane top coat handles Niagara freeze-thaw and road salt without delaminating. Rolled-on epoxy kits from a big-box store typically last two to five years because the prep step, diamond grinding to an open concrete profile, is not included.

Yes, with the repair step first. Cracks get routed and filled with flexible polyurea joint filler; spalled patches get ground back and patched level. A coated floor looks worse over an unrepaired crack, the coating spans it, and eventually the crack telegraphs through the coating. A good installer prices crack and spall repair alongside the coating in the initial quote so the full scope is visible before any work starts.

With a full epoxy system, light foot traffic at 24 hours and vehicle parking at 72 hours. With polyaspartic, foot traffic in 3 to 4 hours and vehicle parking the same evening or the following morning. The exact timeline depends on the temperature and humidity that day, a reputable installer will confirm the return-to-service schedule in writing at the end of the job.

Both are professional floor coatings that start with diamond-grind prep. Polyaspartic cures 6 to 8 times faster, handles UV better so it does not yellow near windows, and typically costs a bit more per square foot. Epoxy is thicker, slightly more forgiving to apply, and costs less. For most Niagara garages without south-facing windows, both are durable choices over a properly ground slab. See the full comparison on the polyaspartic page.

Almost always a prep failure. Paint-rolled or acid-etched installs leave residual contamination or an insufficiently open surface, and the epoxy cannot bond long-term. The coating adheres initially and then starts lifting from the edges or around cracks as moisture works under it. A repair involves grinding back to bare concrete, patching anything structural, and recoating over a properly open surface. The product is rarely the problem.

Epoxy and polyaspartic have different minimum cure temperatures, so the answer depends on which system is being installed. Full epoxy typically needs surface and ambient temperatures of roughly 13°C (55°F) and up, which in Niagara means a bookable season of roughly April through November, with peak demand in April through June when winter damage is most visible. Professional polyaspartic is commonly rated for application down to about 2 to 4°C (35 to 40°F), though the resin material itself often has a separate, higher minimum, and humidity and dew point still matter. Polyaspartic can extend into shoulder-season weather that is too cold for a full epoxy install, while a Thorold garage sitting near or below freezing is outside the realistic range for either system.