Worked case: a two-car flake epoxy garage on a sound tract slab in Greer Ranch — what happens and what it costs

The scenario

Picture a two-car garage in a house from the 2000s, about 20 by 20 feet, 400 square feet. The slab has bare gray concrete, a few hairline cracks along the control joints, one old oil spot where a car idled and a faint sheen where a builder sealer may still sit on the surface. The door faces south, so the driveway reflects the afternoon sun into the room.

The owners park two cars and use one wall for cabinets and the other for bikes. They want the floor to hide dust and tire marks and to look quiet from the street. They choose a three-color flake blend that echoes the cabinet color, and they expect to keep the cars outside for a few days.

The starting conditions at a glance:

• Size: two-car garage, about 400 square feet
• Slab: sound, about fifteen years old, hairline cracks only, one oil spot, possible builder sealer
• System: flake epoxy, full broadcast, clear top coat
• Setting: a homeowners association neighborhood, a south-facing door and July and August mean highs near 91°F

What the job involves

1. The installer measures the room, scrapes a test patch, drops water on the concrete to see whether it soaks in, and notes the oil spot and the cracks.
2. The owner sends the management company a short note naming the address, the dates, the fact that the work is inside the garage and where the crew parks; the CC&Rs decide what applies.
3. A diamond grinder with a dust shroud and a vacuum removes any sealer and opens the surface; the oil spot is degreased and ground again, and the hairline cracks are routed, filled and ground flush.
4. The crew starts early, before the slab warms; the primer goes down, then the pigmented epoxy base is rolled in sections.
5. Flakes are broadcast by hand to full coverage while the base is wet, and the next day the loose flake is scraped and vacuumed.
6. A clear top coat is rolled over the flakes; the data sheet sets the day for foot traffic and the day the cars come back.

Materials and prep

• Floor grinder with diamond segments, dust shroud and a vacuum, plus a hand grinder for the edges
• Primer, tinted epoxy base coat, vinyl flake in the owners' blend and a clear top coat
• Notched squeegee, roller covers, a flake bucket, cleated shoes and box fans
• Infrared thermometer for the slab and a moisture test kit

Add-ons often paired with this job

• Coat the stem wall (the low wall around the garage) — +$150–$400. Coating the low wall around the door finishes the perimeter.
• Move the garage contents out and back — +$150–$350. Clearing the wall cabinets and bins before the grind and returning them afterward is a flat line the owner can handle.
• Coat the entry steps or landing — +$100–$250. If the garage has a step up to the house door, the same stack can wrap it.

Why it is done this way

Flake is the system that price guides list first for a reason. At $6–$9 per square foot it hides small flaws in a fifteen-year-old slab, adds texture underfoot and gives the owners a choice of colors. A solid color at $4–$7 shows every patch, and metallic at $9–$13 asks for an even slab.

The custom blend is a small flat line, $100–$300, because it only changes which bags of flake are bought. It is also the choice owners remember: a blend picked against a cabinet color looks intentional where a default mix looks like a default.

Heat decides the clock. With July and August mean highs near 91°F, the slab is checked with a thermometer, and the base coat goes down early because a slab that has warmed by midday shortens the working time and can release air as bubbles. Epoxy cures slowly enough to broadcast flake by hand.

The association is part of the job even though the floor is inside. The crew's vehicle at the curb and an open garage door are what the rules usually cover, so one note beforehand is cheaper than one stop-work call.

The alternatives that were weighed and set aside:

• Polyaspartic flake at $7–$11 would be a fit if the door faced afternoon sun all day and the cars had to be back quickly.
• Solid color at $4–$7 saves money and shows every crack repair.

What would change the price

• A sealer that will not take water or a slab that tests damp adds the damp-slab line of $2–$4 per square foot, or a longer wait.
• More than a few hairline cracks adds the crack line of $1–$2 per square foot.
• A three-car garage instead of two changes the area to about 700 square feet, and every per-square-foot line scales with it.
• Partial flake broadcast instead of full changes the look and the material, not the estimator line.
• A stem wall, steps and moving the contents are flat add-ons.