Garage Floor Epoxy in Janesville, WI

Garage floor epoxy is the job we do most in Janesville. Every winter your car drives in carrying snow, slush and whatever the road crews spread that week, and it melts into puddles under the tires. Bare concrete soaks that brine in. Garage floor epoxy seals the slab across the whole floor so the meltwater sits on top, where a squeegee can push it out the door.

What winter does to a bare slab

Concrete is porous. Salty water works into the top layer, and when it freezes at night and thaws in the afternoon, the pressure breaks the surface apart. Janesville's average January low is 11.6°F and its average high is 28.3°F, so a garage floor near the door can go through those swings many times in a season. A 2008 review prepared for the South Dakota DOT by the Michigan Tech Transportation Institute found that sodium chloride usually shows up as severe scaling under freeze-thaw cycles, and that magnesium and calcium chloride can also react chemically with the cement paste. The first few feet inside the overhead door usually show it first.

Signs your garage floor needs work

• Flaking or rough patches near the door and under the tires
• Crusty white rings where puddles dried
• Oil and transmission fluid stains that have soaked in
• Dust that returns no matter how often you sweep
• A kit coating or paint peeling in the tire paths
• Cracks, broken control joints or low spots where water sits

Why prep decides the result

Most failed garage coatings never bonded well. Store kits usually rely on acid etching, which cleans the surface but leaves weak, salt-damaged concrete and old sealers in place. We diamond grind the whole floor, edges included, to remove that layer and open the pores. Then we vacuum, degrease oil spots, fill cracks and pitted areas, and only then lay down the base coat. If paint or an old coating is on the floor, it comes off first.

Janesville garages vary a lot

About 14% of Janesville homes were built before 1940, according to 2019 to 2023 Census survey data compiled by Point2Homes. Many of those have detached garages on narrow lots, with thin slabs that slope, crack or hold water at the low end. Ranch homes from the 1960s and 1970s, which make up about a third of the city's housing, often have attached garages with old sealer or paint. Homes from the 1990s and 2000s usually have wider attached garages with flatter floors. We look at which kind you have and price the prep to match.

Choosing a finish

Most Janesville garage floors get a full flake broadcast, which hides salt film between cleanings and gives tires and boots more grip. A solid color with a light flake or an anti-slip additive in the topcoat gives a cleaner look. A polyaspartic topcoat adds UV and abrasion resistance and shortens the wait before you can park. We bring samples so you can see the colors in your own garage light.

Caring for the floor in winter

A sealed floor still needs attention from November to March. Push meltwater out with a floor squeegee, rinse the floor every few weeks during salt season, and use a containment mat under each car if you want less cleanup. Avoid metal-edged shovels on the coating, and keep tire chains off it.