What questions should I ask a garage floor coating contractor?

Ask whether they diamond grind or acid etch the slab, whether they moisture test before quoting, how many mils thick the finished floor is, whether the chip broadcast is full or partial, how cracks and pits are repaired, when you can walk on and park on the floor, what the written warranty covers and who honors it, and whether the person quoting the job is the person installing it.

Is epoxy or polyaspartic better for an Illinois garage?

Polyaspartic performs better in Illinois garages. Epoxy is rigid, yellows in sunlight, and lifts under hot tires, and Illinois slabs face road salt, freeze-thaw movement, and summer heat. Epoxy can work in a heated shop with no sunlight or salt exposure, but for an attached garage where a salted vehicle parks every winter, a polyaspartic flake system is the better choice at a similar price.

Why does diamond grinding matter for a garage floor coating?

Diamond grinding uses mechanical tooling to open the pores of the concrete so the basecoat anchors into the slab rather than sitting on top of it. Acid etching applies chemicals to the surface and produces a weaker bond. Most coating failures trace back to prep, which is why grinding is the single most important question to ask any contractor.

How thick should a garage floor coating be?

A professionally installed full broadcast flake system measures over 50 mils thick. A box-store DIY epoxy kit lands around 3 to 5 mils. Mil thickness is the most useful way to compare quotes from different companies on equal footing, and any contractor who cannot state the finished thickness of their system does not know their own product.

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Homeowner Buying Guide

Garage Floor Coating Companies in Kankakee, IL : How to Compare Contractors in 2026

Q: What is the difference between polyurea and polyaspartic garage floor coatings?

Polyaspartic is a type of polyurea, specifically an aliphatic polyurea, which is why it resists UV yellowing. Most branded polyurea systems use a polyurea basecoat with a polyaspartic topcoat. Both perform well in Illinois garages. The marketing distinction between the two names matters less than the prep work underneath the coating.

Q: What are the red flags on a garage floor coating quote?

Watch for pricing that expires the same day, acid etching instead of diamond grinding, no moisture test before quoting, a verbal warranty with nothing in writing, vague product specs like industrial grade with no system name or mil thickness, a large deposit demanded before work begins, and no local address or local reviews.

Four types of companies will quote your garage floor. They use different products, different prep, and different price structures. Here is how to tell them apart before you sign anything.

By Jeremiah Green, co-owner of Green Pro Services · Updated July 2026 · 9 minute read

Who installs garage floor coatings in Kankakee, IL? Green Pro Services installs one-day polyaspartic flake floors across Kankakee County and Will County, and we are the local option based in Kankakee at 407 S. Yates Ave. Homeowners here also get quotes from regional dealers of branded polyurea systems such as Penntek and Trim-A-Seal, from national franchise installers that travel down from the Chicago suburbs, and from general contractors who subcontract the work.

Most two-car garage floors in Kankakee County run $2,200 to $3,800 installed. The price gap between companies usually comes down to two things: whether they diamond grind the slab or acid etch it, and whether the crew quoting the job is the crew doing the job.

I am Jeremiah Green. I co-own Green Pro Services with my nephew Clayton. We have cleaned and coated concrete in this county for years, and we hold 89 five-star Google reviews for the work. I am not going to pretend we are the only company that can do a good job on your garage. What I will do is show you how the category actually works, so you can read a quote and know what you are looking at.

This guide covers the four contractor types you will run into, the questions that separate a real installer from a sales operation, which coating chemistry belongs in an Illinois garage, what things cost, and the warning signs worth walking away from.

The Landscape

Who installs garage floor coatings in Kankakee County?

Four kinds of companies quote garage floors in this market. Each one comes with a different set of tradeoffs.

Local independent installers

Owner-operated companies based in the county. The person who quotes the job usually runs the grinder. Smaller schedules mean you may wait a week or two, but you get direct accountability and a local address you can drive to. Green Pro Services falls in this category.

Branded product dealers

Companies licensed to install a specific manufacturer's system, like Penntek or a similar polyurea line. Trim-A-Seal is a long-running example in this region. The product is proven and the warranty is backed by the manufacturer. The tradeoff is that you buy the brand, not the crew, and installation quality varies by dealer.

National franchise installers

Territory-based franchises that drive down from the Chicago metro. They move fast and often finish in a day. Expect a commissioned salesperson at your kitchen table, same-day pricing pressure, and a crew you meet for the first time on install morning.

General contractors and handymen

Remodelers who add floor coatings to their list and subcontract or DIY the install. Usually the cheapest quote. Usually the one that fails first, because coating concrete is a prep trade and most GCs do not own a grinder or a moisture meter.

Where does Green Pro Services fit?

We are the local independent. We are based in Kankakee, our crew is two people who both work every job, and we install the SimIron SIMFLAKE SB/UV one-day polyaspartic system. We grind every slab with diamond tooling, we broadcast chips to full rejection, and you park on the floor in 24 hours. If a national franchise can beat our number on your job, take their number. Just make sure you are comparing the same prep and the same mil thickness.

Vetting

What questions should you ask a garage floor coating contractor?

Ask these eight questions on every estimate. The answers tell you more than the price does.

1. Do you diamond grind the concrete or acid etch it?

This is the single most important question on the list. Diamond grinding opens the concrete pores with mechanical tooling so the basecoat anchors into the slab. Acid etching splashes chemicals on the surface and hopes for the best.

Answer you want: "We diamond grind the full slab, edges included."

2. Do you moisture test the slab before quoting?

Concrete pushes water vapor up from the ground. A slab with a vapor drive problem will delaminate any coating you put on it, no matter how good the product is. A calcium chloride test or an RH probe takes minutes.

Answer you want: "Yes, and we flag the result before we schedule."

3. How many mils thick is the finished floor?

Mil thickness is how you compare systems on a level field. A box-store epoxy kit lands around 3 to 5 mils. A full broadcast flake system with a polyaspartic topcoat runs over 50 mils. If a contractor cannot answer this, they do not know their own product.

Answer you want: a specific number, not "industrial grade."

4. Is this a full chip broadcast or a partial?

Full broadcast means chips go down to rejection, covering every square inch until the floor will not take another flake. Partial broadcast scatters chips for looks and leaves basecoat showing. Full costs more in material and hides slab imperfections better.

Answer you want: "Full broadcast to rejection."

5. What happens to my cracks and pits?

Cracks, pits, and spalled areas need filling and leveling during prep, or they telegraph through the finished floor. Ask what filler they use and whether repair is included in the quote or billed on top.

Answer you want: a named repair process, priced in the quote.

6. When can I walk on it and when can I park on it?

A true one-day polyaspartic system lets you walk that evening and park in 24 hours. Epoxy systems typically need several days before a vehicle touches the floor. Both can work. You just need to know which one you are buying and plan around it.

Answer you want: specific hours, not "pretty quick."

7. What exactly does the warranty cover, and who honors it?

Get it in writing. Ask whether it covers delamination, hot tire pickup, and UV yellowing, and ask whether the installer or the manufacturer honors a claim. A manufacturer warranty is worthless if the failure came from bad prep, since prep is the installer's responsibility.

Answer you want: a written document you can read before signing.

8. Is the person quoting me the person installing my floor?

On a franchise job the answer is almost always no. That is not automatically bad, but it means the promises made in your kitchen and the work done in your garage come from two different people. Ask who leads the crew and how long they have installed this system.

Answer you want: an honest one, either way.

If you want more detail on the prep side, we broke down the full process on our garage floor coatings page, including why we grind every slab before the basecoat goes down.

Product Comparison

Polyurea, polyaspartic, or epoxy: which one belongs in an Illinois garage?

Illinois garages face a punishing cycle. Road salt rides in on your tires from November through March. The slab swings from below freezing to sixty degrees in a single week. Hot tires park on the coating in July. Any system you buy has to survive all three.

Here is how the three chemistries compare on the things that matter here:

Factor	Epoxy	Polyurea	Polyaspartic
Cure speed	Slow, days to full cure	Fast	Fast, one-day install
UV stability	Yellows in sunlight	Good	Good, UV-stable topcoat
Hot tire pickup	Prone to lifting	Resistant	Resistant
Road salt resistance	Moderate	Strong	Strong
Flexibility in freeze-thaw	Rigid, cracks with slab movement	Flexible	Flexible
Typical use	DIY kits, budget installs	Basecoat in branded systems	Basecoat and topcoat, full system

What is the real difference between polyurea and polyaspartic?

Polyaspartic is a type of polyurea. Chemically it is an aliphatic polyurea, which is why it holds up under UV without yellowing. When a company markets a "polyurea system," they usually mean a polyurea basecoat with a polyaspartic topcoat. That is a good system. So is ours. The marketing distinction between the two names is thinner than the sales pitch suggests, and we wrote a full breakdown in our epoxy garage floor cost guide for Kankakee and Bourbonnais.

Does epoxy ever make sense?

In a heated shop with no sunlight and no road salt, a properly installed epoxy floor can last a long time. In a Kankakee County attached garage where you park a salted vehicle every winter, it is the wrong tool. That is why most homeowners who call us asking for epoxy end up choosing a polyaspartic flake system for the same price. If your existing epoxy floor is already lifting, we cover the fix in our guide on peeling epoxy garage floors.

Does the brand name matter?

Less than the prep. A premium branded system installed over an acid-etched slab will fail. A well-made system installed over a properly diamond-ground slab will last. Ask about the grinder before you ask about the label.

Pricing

How much does a garage floor coating cost in Kankakee, IL?

A professionally installed full broadcast flake floor in Kankakee County runs roughly $6 to $8 per square foot. Here is what that translates to by garage size:

Garage size	Approximate square footage	Typical installed price
1-car garage	240 to 300 sq ft	$1,500 to $2,400
2-car garage	380 to 480 sq ft	$2,200 to $3,800
3-car garage	600 to 800 sq ft	$3,600 to $6,000

What moves the price up or down?

Concrete condition. Heavy cracking, pitting, or spalling adds repair labor before any coating goes down.
Moisture. A slab with vapor drive needs a moisture-mitigating primer, which adds cost.
Existing coating. Old failing epoxy has to be ground off, and that grinding is slower than prepping bare concrete.
Kickwalls and cove. Coating up the wall a few inches costs extra but keeps water and salt off the drywall.
Color blend. Standard blends cost less than custom mixes. We stock 21 blends you can see on our garage floor coating colors page.

Want a number for your specific garage before anyone comes out? Run the garage floor coating cost estimator. Enter your square footage and it gives you a real range in about thirty seconds.

Warning Signs

What are the red flags on a garage floor coating quote?

Any one of these is a reason to slow down. Two or more is a reason to get another quote.

The price expires tonight. A real number for a real garage does not evaporate at midnight. Discount pressure exists to stop you from getting a second quote.

No grinder on the truck. If prep is acid etch or a light scuff with a buffer, the coating is bonding to the surface instead of into it.

No moisture test. Quoting a slab without checking it for vapor drive means guessing with your money.

A verbal warranty. If it is not written down with named exclusions, it does not exist.

Vague product specs."Industrial grade" and "commercial strength" are not products. Ask for the system name and the mil thickness.

A large deposit up front. A reasonable scheduling deposit is normal. Half the job before anyone touches concrete is not.

No local address and no local reviews. If something goes wrong in year two, you want a company you can drive to.

The Short Version

How should you choose between garage floor coating companies?

Get two or three quotes. Ask all eight questions above at every one. Then line the quotes up side by side and compare four things only: prep method, mil thickness, chip coverage, and written warranty terms. Price comes last, because a $2,400 floor that peels in three winters costs more than a $3,200 floor that lasts fifteen years.

If the cheapest quote skips the grinder, it is not the cheapest quote. It is a down payment on doing this again.

About the author

Jeremiah Green co-owns Green Pro Services with his nephew Clayton Green. The company is based at 407 S. Yates Ave in Kankakee and serves Kankakee County and Will County with exterior cleaning and one-day polyaspartic concrete coatings. Green Pro Services holds 89 five-star Google reviews. Call (815) 650-0397 for a free quote.

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Free on-site estimate with a moisture and condition check of your slab. Diamond grind prep, full flake broadcast, one-day install, park on it in 24 hours. Kankakee County and Will County.

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