10 Questions to Ask Before Hiring a Floor Coating Contractor

Hiring a floor coating contractor is not like hiring a painter. The work is technical, the consequences of bad installation are expensive, and the difference between a good contractor and a bad one is not obvious from a quote sheet. These 10 questions separate the professionals from the rest.

1. What surface prep method do you use?

The right answer is diamond grinding or shot blasting. If the contractor says acid etch only, that is a red flag. Acid etching produces inconsistent profiles and fails on older or contaminated concrete. Diamond grinding creates a uniform surface that coatings bond to reliably.

2. Do you test for moisture before starting?

Moisture vapor pushing through concrete is the most common cause of coating failure that homeowners never see coming. A professional contractor tests for moisture using calcium chloride tests (ASTM F1869) or relative humidity probes (ASTM F2170). If they do not test, they are gambling with your floor.

3. What coating system and brand do you use?

Reputable contractors use commercial-grade products from established manufacturers — not retail-grade materials from hardware stores. Ask for the product name and manufacturer. You should be able to look up the technical data sheet (TDS) online to verify the product’s specs.

4. How many coats are in your system?

A quality residential system includes a primer or base coat, a color or flake layer, and one or two clear topcoats. Single-coat systems exist but sacrifice durability. Ask what each layer does and how thick the total system will be.

5. What is included in your warranty?

A warranty that covers only the product is not worth much — it means the manufacturer guarantees the material was not defective in the bucket. What you want is a warranty covering both materials and workmanship. Ask:

• How many years does the warranty cover?
• Does it cover adhesion failure?
• What maintenance is required to keep it valid?
• How are claims handled — do you come back and fix it, or just refund materials?

Get the warranty in writing as part of your contract.

6. Are you licensed and insured?

Licensing requirements vary by state. In states that require contractor licensing, verify the license number with the licensing board. At minimum, the contractor should carry general liability insurance and workers’ compensation coverage. Ask for a certificate of insurance — a legitimate contractor will provide one without hesitation.

7. How do you handle cracks and concrete damage?

Cracks should be routed (widened with a saw or grinder) and filled with a flexible or semi-rigid filler before coating. Cosmetic crack filling that just skims over the surface will telegraph through the coating. Spalling, pitting, or damaged areas may need patching with a cementitious repair compound. Ask what their process is and whether repair costs are included in the quote or billed separately.

8. What is your timeline, and when can I use my garage again?

A professional should give you a clear timeline: when they start, how many days the work takes, when you can walk on the floor, and when you can park on it. Typical timelines:

• Epoxy systems: 2–3 days of work, drive on it in 5–7 days
• Polyaspartic systems: 1 day of work, drive on it in 24 hours

If the contractor cannot give you specifics, they either have not done enough of these or are not planning the job properly.

9. Can I see recent completed projects?

Photos on a website are a start, but ask for recent work within the past 6–12 months. Better yet, ask for references from homeowners who had similar work done. A contractor with a track record will not hesitate. A contractor who deflects or has no portfolio should give you pause.

10. What happens if the coating fails?

Ask directly: if the floor peels, bubbles, or delaminates within the warranty period, what do you do? The answer you want: they come back, assess the cause, and repair or recoat at no cost. Watch out for contractors who add excessive exclusions or blame the homeowner for issues caused by their prep work.

Red Flags to Watch For

• Quoting without seeing your floor in person
• Price significantly below market rates (they are cutting corners somewhere)
• No moisture testing
• Acid etch as the only prep method
• No written warranty
• Unable to name the coating brand or provide a TDS
• Pressure to sign immediately or claims of limited-time pricing

FAQ

Should I get multiple quotes?

Yes. Three quotes is a reasonable number. Comparing quotes helps you understand market pricing and identify outliers — both high and low. Pay attention to what is included, not just the bottom-line number.

Is the cheapest quote always a bad sign?

Not always, but be cautious. Ask why they are lower. If the answer involves skipping steps (no grinding, fewer coats, no moisture test), the savings will cost you more when the floor fails. A lower price from an efficient operation with lower overhead is different from a low price achieved by cutting corners.

Do I need a contract?

Yes. A written contract should specify the scope of work, coating system and brand, surface prep method, timeline, total cost, payment schedule, and warranty terms. Verbal agreements leave you with no recourse if something goes wrong.

What if a contractor refuses to answer these questions?

Move on. A professional who is confident in their work will answer technical questions without hesitation. Evasiveness, vague answers, or irritation at being asked are signs that you should look elsewhere.

Compare Contractors on CoatedLocal

Armed with these questions, you are ready to evaluate contractors with confidence. Use CoatedLocal to find and compare vetted floor coating professionals in your area, read reviews, and request quotes from contractors who meet the standard.