
How an Epoxy Garage Floor Job Runs
A garage floor job starts with a walk of the slab: cracks, spalls, old paint and patches are mapped and a moisture test is set. On install day the floor is ground, vacuumed and repaired, then the base coat, broadcast and topcoat go down in the order the proposal lists. You get dates in writing for foot traffic and for parking the first car.
Attached Garages and the House Next Door
An attached garage shares a wall and a door with living space, so dust and odor control matter. We grind with vacuums at the machine, seal the house door during work and choose low-odor products where the system allows, which keeps grinding dust and solvent smell out of the kitchen rather than tracked through it.
Detached Garages Through a Lake Michigan Winter
Many Hammond detached garages are never heated, and the slab sits near freezing for months. The NOAA 1991-2020 normals at nearby Chicago Midway count about 106 days a year with a low at or below freezing. We pick systems that tolerate that cycle and schedule installs for weather the coating can actually cure in.
Moisture Testing a Garage Slab
Building codes allow a garage slab to be poured without the vapor retarder required under a heated slab; the IRC R506.2.3 exception covers garages and unheated accessory structures. That means a garage can pass vapor up into a coating even when the house slab beside it is protected, so we test the garage on its own rather than assume.
Pitting, Spalls and Cracks in an Older Garage Floor
With most of Hammond’s housing built before 1980, garage slabs often arrive pitted, spalled or cracked. Surface damage is ground, filled and patched before coating. A slab that is heaved, badly settled or still moving gets an honest call that replacement beats coating, because resin bridges no structural movement.
Brine and Rock Salt on Bare Concrete
Calcium chloride and rock salt carried in on tires soak into bare concrete, and repeated freeze and thaw with salt in the pores scales and pits the surface. One winter can leave a new slab rough at the parking spots. A coating keeps the salt water on top where a squeegee can clear it.
Cold Weather Limits for Epoxy
Epoxy cures by chemical reaction, and a cold slab slows it badly or leaves it soft and blushed. We read slab temperature and dew point before a coat goes down, and if an unheated garage cannot hold a safe margin through the cure, we book it for spring rather than coat it anyway.
Hot Tire Pickup
A tire coming in off a summer drive is hot and soft, and when it cools on a thin or under-cured coating it can grip the film and pull it off the slab. Building enough thickness, bonding to a ground profile and using a topcoat rated for tire traffic stops the lifting that bargain one-coat kits are known for.
Store-Bought Epoxy Kits Compared With a Ground Floor
Big-box kits are water-based or thinned coatings applied over an acid-etched slab, often at a few mils thick. A professional floor is a ground slab, a 100% solids or high-build base, a broadcast and a protective topcoat. The kit costs less on day one and usually costs more by the time it is stripped and redone.
Garage Floor Epoxy Cost
Published ranges for concrete coatings around south Chicagoland run roughly $3 to $15 per square foot. What moves a floor within that range is crack and spall repair, removal of old coatings, moisture mitigation, the system chosen and the size of the slab. We price after the slab is mapped, so the number holds.
What a Coating Warranty Leaves Out
Most coating warranties exclude damage from moisture vapor or hydrostatic pressure coming through the slab, along with slab movement and impact. We read those exclusions to you before you sign, starting with moisture, so you know exactly what the warranty covers and why the moisture test comes first.