Garage Floor Epoxy Coating: Hire Out or DIY?
You’re looking for someone to coat your garage floor — or at least weighing whether to hire it out versus doing it yourself. The honest answer: for most single-car or two-car garages, a quality DIY kit gets you 90% of the result at 30% of the cost. But there are real cases where a pro is worth every dollar.
What Local Installers Actually Do
A professional epoxy crew will prep the floor (usually diamond grinding, not acid etching), apply a two-part epoxy base coat, add decorative flake if you want it, and seal with a polyaspartic or urethane topcoat. The whole job typically takes one to two days. They bring commercial grinders, blowers, and squeegees — equipment that matters for adhesion.
The trade-off is cost. Expect $3–$7 per square foot for a basic epoxy system from a regional installer. A full polyaspartic job with flake broadcast runs $6–$12 per square foot or more in higher cost-of-living areas. A 500 sq ft two-car garage can easily land between $1,500 and $4,000 installed.
How to Find a Reputable Installer
Skip the generic “garage floor epoxy near me” Google results and go straight to referrals and review-filtered searches.
- Google Business reviews: Filter for 4.5+ stars with at least 30 reviews. Read the 3-star reviews — they’re more honest than the 5s.
- Angi and HomeAdvisor: Useful for ballpark quotes, but pre-screen any contractor before letting them in.
- Local flooring and concrete contractors: Many residential epoxy installers are actually concrete coating specialists. Search for “polyaspartic floor coating” or “concrete coating contractor” — you’ll find different, often better results than searching for epoxy specifically.
- Ask for a moisture test: Any installer worth hiring will check for slab moisture before quoting. If they skip this step, walk away.
Get at least three quotes. Ask each one what grit they grind to (usually 40–80 grit for epoxy adhesion), how many coats they apply, and what the topcoat product is. Vague answers are a red flag.
When DIY Makes More Sense
If your garage slab is in decent shape — no major cracks, no active moisture issues, no oil-soaked sections — a DIY kit is genuinely viable. The gap in quality between pro and DIY has closed significantly as water-based epoxy and DIY polyaspartic kits have improved.
Rust-Oleum EpoxyShield 2-Part Garage Floor Coating Kit covers up to 500 sq ft and runs around $100–$130. It’s a water-based epoxy — easier to apply, lower VOCs, but not as hard as a 100% solids system. Fine for light to moderate garage use.
For a harder finish closer to what pros use, Armorpoxy 2-Part Epoxy Floor Coating is a step up. Solvent-based, higher solids content, more durable under hot tire traffic. More prep-sensitive, though — surface prep becomes even more critical.
If you want a fast-cure polyaspartic option (back on your floor in 24 hours), Ghostshield Polyaspartic 745 is one of the few true DIY polyaspartic products available. It’s more expensive per square foot than epoxy but cures faster and handles UV better.
The Prep Problem (Why Some DIY Jobs Fail)
Most failed DIY epoxy jobs come down to one thing: inadequate surface prep. Acid etching — which comes with most box store kits — is not equivalent to diamond grinding. On a trowel-finished or sealed slab, acid etching barely opens the pores. The epoxy peels within a year.
If you’re going DIY, rent a floor grinder with diamond cup wheel from a local equipment rental. It’s usually $60–$100 per day. Grind the entire surface to a concrete surface profile (CSP) of 2–3 — visible aggregate, slightly rough to the touch. Vacuum, degrease oil spots with a degreaser and a stiff brush, and let it dry fully before coating.
Skipping this step is the single biggest reason epoxy peels.
Comparing Costs Side by Side
To put it plainly:
- DIY with acid etch + box store kit: $100–$200. Lowest durability, highest failure risk.
- DIY with rented grinder + quality two-part epoxy: $250–$500 total. Solid result if you follow prep correctly.
- Professional install, basic epoxy/flake: $1,500–$3,000 for a two-car garage.
- Professional polyaspartic full system: $2,500–$5,000+.
The pro option buys you a warranty (typically 1–5 years), professional prep equipment, and faster turnaround. If you have a large garage, an older slab with unknown history, or you just don’t want to spend a weekend doing this, the pro cost is justified.
Bottom Line
Finding a local installer is straightforward if you vet for moisture testing, grinding (not just etching), and a clear topcoat spec. If your slab is clean and you’re willing to rent a grinder, a DIY job with a quality two-part kit holds up well and saves significant money. The prep step is non-negotiable either way — that’s where the job succeeds or fails.
Where to buy
- Rust-Oleum EpoxyShield 2-Part Garage Floor Coating Kit
- Armorpoxy 2-Part Epoxy Floor Coating
- Ghostshield Polyaspartic 745
- Floor grinder with diamond cup wheel