Start with prep — it should be named, not implied
The single most informative line on any quote is the surface-preparation method. Look for words that describe a mechanical process — diamond grinding is the common professional standard — rather than vague wording like "prep included" or "floor will be cleaned and etched." As our prep guide explains, grinding opens the concrete so the coating bonds mechanically; a quote that will not say how the floor is prepared is asking you to trust the step that decides whether the coating stays down. Also check whether dust control and vacuuming during grinding are mentioned, and whether old paint or a failing prior coating is priced as removal work or quietly assumed away — see coating over a painted floor for why that distinction matters.
Moisture: tested, assumed, or ignored?
A complete quote addresses slab moisture before coating day, not after a blister appears. It may name a test method, state that a moisture-tolerant primer or vapor barrier coat is included, or note the conditions under which the installer would pause the job. What you want to avoid is silence: no test, no mitigation, and no mention at all. Our moisture testing guide covers why damp slabs peel good coatings. If moisture language is missing, ask the installer directly what happens if the slab tests damp — the answer, and whether it is in writing, tells you a lot.
Count the system, not just the finish
- Coats and roles. A professional system is usually described in layers — a primer or base coat, a decorative or build coat (for example a full flake broadcast), and a protective clear topcoat. A quote that lists only a color and a finish name, with no layer description, is hard to compare against one that spells the build out.
- Product family. Whether the system is epoxy, polyaspartic, or a combination (epoxy build with a polyaspartic topcoat is common) should be stated. Our comparison guide and polyaspartic deep-dive explain what each choice trades off.
- Repairs. Cracks, spalls, and control joints should appear as their own line or an explicit inclusion — not discovered as a day-of extra. See cracks, spalling and control joints for what proper repair involves.
- Edges and the door line. Note whether the quote covers the vertical stem walls or apron strip at the garage door, and where the coating stops. That strip is the most visible and most weather-exposed part of the job.
Schedule and cure windows belong in writing
How many days the job takes, when you can walk on the floor, and when you can park on it are part of the product you are buying — especially with fast-cure systems sold on a one-day install. Compare those promises against our parking guide: a quote that promises parking much sooner than the coating type normally allows deserves a direct question about which product makes that possible. Also confirm what you need to do before install day (emptying the garage, cars parked elsewhere) and who handles it.
Read the warranty like a contract, because it is one
Warranty wording varies widely and only the installer's own document governs. When you read it, look for: what failure modes are covered (peeling and delamination language matters more than a headline number of years), what is excluded (moisture, tire marks, damage from dragging or chemicals are common exclusions), whether hot-tire pickup is addressed, and whether the warranty transfers to a future buyer — worth asking if resale matters to you, as covered in our HOA and resale guide. Keep the signed quote, the final invoice, and the warranty together; that folder is the record of what was actually installed.
Questions that make two quotes comparable
- How exactly will the floor be prepared, and is old coating or paint removal included?
- Will the slab be moisture-tested, and what happens if it reads damp?
- What coats, in what order, and which product family is each one?
- Are crack and joint repairs included, and how are control joints handled?
- When can I walk on it, and when can I park on it?
- What does the written warranty cover and exclude — in the document, not the brochure?
If an installer answers those clearly and puts the answers in the quote, price differences usually explain themselves. If the answers stay verbal, the cheaper total is often just the less complete description.
Cost context
Most professional 2-car garage projects in our region land between $2,400 and $6,000 as clearly-general guidance — see the cost guide. That range is not a quote for your garage. Where a quote lands inside or outside it should track the line items above: prep, moisture handling, repairs, and system build.
The bottom line
Do not compare totals first. Compare prep, moisture, repairs, coats, cure windows, and warranty wording — then let the total be the last thing you look at. A complete quote reads like a small spec sheet; that is what you are paying for.
More homeowner guides
What a garage floor coating costs in Northern California · Slip resistance on coated garage floors · Grinding vs. acid etching · Concrete moisture testing · Epoxy vs. polyaspartic
Want a quote you can actually read?
Use the quote form and ask for the system in writing — prep method, moisture plan, coats, and warranty. A matched local pro can walk through each line for your slab.
Educational note: this guide is general information only. Products, methods, and warranty terms vary by installer and manufacturer — the installer's written quote and warranty govern your project.