Concrete Grinding & Surface Preparation in Martinez CA - a coating that stays bonded
Peeling coating, oil stains or a worn slab? We test it, grind it right and get it ready for a coating that holds.
- Licensed and fully insured.
- Free estimates at your property.
- Expect a reply within 1 business day.
Concrete grinding matched to your coating
Grinding for thinner coatings
Many garage epoxy and polyaspartic coats go on thin, so we grind a finer texture that gives them grip without the scratches showing through the finish.
Grinding for thick coatings and overlays
Heavier coatings and overlays need a coarser, more open surface to bond, and they go on thick enough to cover that texture once they're down.
Do I need my concrete ground before a new coating?
Concrete grinding and surface preparation in Martinez, CA cleans the contamination off your slab and roughens it by machine, so your new epoxy or other coating has sound concrete to grab and stays put.
Most people call us because a coating is peeling, the slab is soaked with oil, or they're about to put down a new floor and want it done once. What moves the price is the size of the floor, what's on it now, how much cracking needs repair and how coarse your coating needs the surface to be, and if an old coating has to come off first, that's concrete floor stripping and removal. The schedule mostly turns on what the moisture check shows and how much repair the slab needs, and I'll put your own figure in a written estimate after I see the floor.
Concrete grinding, testing and repair
I start with the coating you want and how you'll use the floor, then look at the slab itself, because those two things decide how much grinding and repair it takes.
Pick the coating first
We ask which coating you want before we grind, because the coating's maker sets how rough the slab needs to be.
Check the moisture
A slab can look dry and still hold water, so we check moisture before we book the coating date.
Clean, then grind
We break down oil and other contamination first, then grind off the weak top layer to the texture your coating calls for.
Repair and finish
We patch cracks, then the clean slab gets your coating or concrete sealing, or concrete resurfacing and overlays if it's too worn.
Why Martinez owners call Stonefield for prep
I learned floor coatings on my own garage and beside experienced crews, and I know a peeling floor usually started with a slab nobody tested or ground right. That's where we spend our time, and you'll hear what we'll do and why before you sign anything.
I come out to see your slab
I come out myself to look at the floor and give the estimate, and I'm on the job with our crew while they do the prep and the install.
In business since 2017
We've been grinding and coating floors since 2017, from home garages to working shops, and we're best known for concrete floors that stay bonded.
Licensed and fully insured
We're licensed and fully insured for the grinding, repair and coating work we do in your home or shop. Our work comes with one promise, satisfaction guaranteed.
What happens when you call about grinding your slab?
Every prep job is planned around the finish you want and how you use the space, so nothing gets ground or patched until you've seen the plan in writing.
or call (925) 231-8429
Call or send a message
Call (925) 231-8429 or send a message through the form, and tell us a little about the floor and the coating you have in mind.
I look at the slab
I come out to look at the slab, check for stains, cracks and old coverings, and ask how you'll use the floor day to day.
Written estimate, then the work
You get a written estimate, and once you say go, we tell you how long the space is out of use before the crew grinds, repairs and coats.
Get a free estimate for grinding and coating prep in Martinez
Tell us the floor's size, what's on it now, any oil stains and the coating you want. We reply within one business day, and I'll set up a free on-site estimate with no obligation.
Questions about grinding your slab
How much does concrete grinding cost in Martinez?
There's no set price, because it comes down to the floor's size, what's on the slab now and how coarse your coating needs the surface. Old coatings, glue, heavy oil and cracks that need repair add time and cost, while a clean slab headed for a thin coating takes less prep. I'll put your figure in a written estimate after I see the floor.
Why does concrete need to be ground before epoxy?
Grinding takes off the weak top layer and opens up the concrete so the epoxy has something solid to hold. That layer, called laitance, can come loose from the slab, and a coatings maker says a coating bonded to it comes off right along with it. Clearing it first protects what you spend on the finish.
Can a concrete slab look dry and still make a coating peel?
Yes, a slab can feel bone dry to the touch and still hold enough moisture inside to lift a coating within months. A dry surface isn't proof the floor is ready, which is why the moisture check comes before we set a coating date.
How do I get oil stains out of concrete before coating it?
Oil and other contamination have to be removed or broken down with chemicals before any grinding starts, or the coating won't grab in those spots. Badly soaked concrete sometimes has to be cut out and patched, which turns prep into a bigger repair, so mention any oil stains when you contact us.
Do I need a licensed contractor to grind a concrete floor in California?
Usually, yes, because California's minor work exemption only lets someone work without a license on jobs within a $1,000 limit, and only when the work needs no permit and they employ no one on it. Prep and coating jobs often run with a crew, so it's fair to ask every bidder about their license.
What is the best way to keep dust down when grinding concrete?
Start by asking each bidder how their crew keeps grinding dust down, because California's construction silica rule covers how much breathable crystalline silica workers are exposed to on the job. The rule is written for the crew, but it's a fair question for any bid, and I'll walk you through how we handle dust in your space at the estimate.
Work that often goes with prep
Concrete Sealing
If you'd rather keep the look of bare concrete, a sealer goes on a clean, prepped slab and helps it hold up to stains and water.
Explore Concrete SealingConcrete Resurfacing & Overlays
When grinding turns up a slab that's pitted, spalled or uneven, an overlay gives you a fresh surface without tearing out and repouring the concrete.
Explore Concrete Resurfacing & OverlaysConcrete Floor Stripping & Removal
If an old coating, paint or glued-down flooring is still on the slab, it has to come off before we can grind for a new finish.
Explore Concrete Floor Stripping & Removal
Concrete grinding and prep in Martinez and nearby cities
In Martinez, the Building Department issues building permits to homeowners and licensed contractors for work inside city limits, and it's the office to ask whether your floor job needs one. If it does, we sort out with you which city or county office covers your address and who pulls it, then work with that office from there. We do the same prep on garage and shop floors in Concord and Benicia, since we take jobs across Contra Costa and Solano counties.
Older floors get a closer look before we grind. The Bay Area Air Quality Management District, whose asbestos rules cover Contra Costa County, lists vinyl floor tiles, mastics and transite concrete among materials that might contain asbestos, and says a building planned for renovation might need testing before work begins. If I see old tile or black glue on your slab, I'll bring it up at the estimate so any testing happens before a grinder touches it.