The best epoxy flooring installer diamond-grinds the slab, tests for moisture, and uses a 100% solids epoxy with a polyaspartic topcoat — because the coating is only as good as the concrete prep beneath it. A garage floor that peels in two years almost always failed at prep, not product. The installer who spends a day grinding is the one whose floor is still down in fifteen.
Here's how to vet an installer, what a coated floor costs per square foot, and the prep questions that tell you whether a bid is real or just cheap.
A diamond grinder or shot-blaster opens the concrete so the coating bonds. Acid etching alone is a shortcut that fails on dense or sealed slabs. Ask which they use — grinding is the right answer.
Vapor pushing up through the slab lifts coatings off. A good installer tests moisture first and uses a vapor-barrier primer if needed. Skipping this is a common cause of bubbling.
A 100% solids epoxy base with a polyaspartic topcoat is the durable garage standard — UV-stable, hot-tire resistant, and thick. Thin water-based kits are the DIY tier, not a pro install.
Ask to see floors they did a few years ago, not just install day. A coating looks great wet; the test is how it holds up after a winter of hot tires and road salt.
Priced per square foot, install and prep included. Real 2026 ranges:
A bid well under $5 a foot usually means thin product, light prep, or both. Ask what's included in the prep step.
A coating kit can be the right call in some cases:
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About $5 to $12 per square foot installed. A two-car garage typically runs $2,000 to $6,000, with polyaspartic and full flake coats at the higher end.
A 100% solids epoxy base with a polyaspartic topcoat. It cures fast, resists UV yellowing, and handles hot tires.
Bad prep. Without grinding and a moisture test, the coating can't bond. Prep, not brand, decides how long the floor lasts.
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