Project example: a 2-car flake epoxy garage in Rancho del Rey with an old paint coat to remove — what it involves and what it costs

The scenario

Imagine a two-story house in a Rancho del Rey tract, one of the master-planned neighborhoods the city began laying out in the late 1980s. The two-car garage is packed: a workbench, a freezer, bikes on wall hooks and two cars that rarely fit. A previous owner rolled a thin gray paint over the slab, and in the car lanes it has lifted in flat sheets.

The household wants the floor to look finished but not loud. A blend of gray, tan and white flakes is chosen to match the tan stucco and to hide dust. The blend is a custom mix, so it is priced as its own line.

A neighborhood association governs the tract. Association rules in a tract like this usually address the exterior, the driveway and when contractors may work or park, and typically do not reach an interior garage floor; the household reads its own rules and asks the association what applies. No installer can promise an approval.

Before any quote is final the installer needs to know what is under the paint. Paint that peels in sheets is a sign it never gripped the slab, not a sign the slab is bad, and the grinder removes it together with the top of the concrete.

The starting conditions at a glance:

• Footprint: about 440 square feet, a typical two-car garage for the area
• Slab: hairline cracks plus a failed gray paint coat
• System: flake epoxy, full broadcast, clear top coat
• Moving: the contents go out and back, which the installer prices separately
• Association: hours and parking rules checked by the household

What the job involves

1. The household checks the association's rules on contractor hours and parking, and the installer walks the slab and marks the lifted paint.
2. The contents are moved out and stacked in the driveway or inside the house.
3. A diamond grinder removes the old paint and opens the concrete in passes, with a vacuum collecting the dust.
4. Cracks are cut, filled and ground flush; a moisture check is made on bare concrete.
5. A pigmented epoxy base is rolled out in sections and the custom flake blend is broadcast by hand to full coverage.
6. After the base cures, loose flakes are scraped and vacuumed off and a clear top coat locks the flakes in; cars wait for the data sheet's time.

Materials and prep

• Diamond grinder with a dust shroud and a HEPA vacuum, plus a scraper for paint edges
• Crack filler, primer and pigmented epoxy
• A custom flake blend in gray, tan and white
• Clear top coat, rollers, scrapers and spiked shoes

Add-ons often paired with this job

• Custom flake blend — +$100–$300. A custom blend is a separate line from the standard chips.
• Move the garage contents out and back — +$150–$400. The contents moved out and back are priced as a flat line.
• Coat the stem wall (the low wall at the garage door) — +$150–$400. The stem wall at the door can take the same system if the household wants it.

Why it is done this way

The old coating is the biggest price driver in this scenario. Removing paint takes extra grinder passes and extra time per square foot, which is why the estimator adds it as a surcharge. Painted floors that peel often fail from poor preparation, and a new coating over a peeling coating would fail the same way.

A flake system is the common choice for a garage that wants to hide dirt. Full broadcast covers the base color completely, and a mid-tone blend shows less dust and fewer tire marks than a solid color.

The citywide July mean daily high is 74.6°F, and tracts farther from the bay run warmer than the average suggests. A garage door that stays open to afternoon sun can amber a standard epoxy top coat, and aliphatic polyaspartic or polyurethane top coats are generally more UV-stable. The household can ask for a different top coat chemistry as a separate line on the bid.

The practical question is parking. Epoxy systems usually take longer than polyaspartic, often several days before a car; the data sheet and the day's temperature decide.

What would change the price

• The old paint is thicker than it looked and needs a second grinding pass.
• The household drops the custom blend and takes a standard chip mix.
• The contents are left in place and the job is done in two halves.
• A moisture check reads high and a vapor-barrier primer is added.
• The garage is a 3-car garage of about 700 square feet.