Somebody has told you the new line needs an ESD floor: a customer audit, an equipment vendor, or a line buried in a contract you are bidding. Now you are reading data sheets, several of them say ESD or static dissipative across the top, and you are working out whether one of those products gets you a compliant floor.
On its own, it does not. A static-control floor is a grounded electrical assembly that happens to look like a coating, and the part that makes it work is buried underneath, out of sight from day one.
The short version. A static-control floor is a conductive or dissipative coating over an embedded conductive grid, usually copper strip, physically tied to a grounding point. The coating carries charge sideways into the grid, the grid carries it to ground, and without that connection you have a floor with conductive filler in it and nowhere for the charge to go. Conductive and dissipative are two targets on one resistance scale, your spec says which, and the floor only counts once it has been tested in place and retested on a schedule.
Static is generated by contact and separation. A person walking, a cart rolling, a tote sliding off a rack: two surfaces touch, electrons move, and they separate holding opposite charges. On a dry day, a person walking across an insulative floor is one of the most reliable charge generators in the plant.
People cannot feel most of it. You generally do not notice a discharge until it is well up into the thousands of volts, and plenty of modern components are damaged far below that. Your operators can be zapping parts all shift and report an uneventful day.
The damage also does not always show up at test. Some events kill a device outright, which is at least honest. The ones that hurt are latent, where a device is wounded, passes every functional test you run, ships, and dies in the field weeks or months later. They come back as warranty claims with no obvious root cause, very hard to trace to a floor.
The floor is not the only control. It is the one sitting under every person, cart and chair in the building, whether anyone remembers procedure or not.
Both move charge to ground. The difference is how fast, which is really a question of how much resistance sits between the surface and the ground point.
Conductive systems sit at the low end of the resistance scale and drain charge quickly. Dissipative systems sit higher and bleed it off more gradually. As a rough shape of that scale, the industry treats somewhere around a million ohms as the dividing line, with dissipative running up toward a billion ohms before a floor stops doing useful work. Treat that as orientation, not as specification. The target and the way it is measured come from your ESD control program and the system you are buying. Apex puts it plainly: these floors “dissipate static charge within the specified range.” The specified range is the one in your documents.
Faster is not automatically better. Where technicians work on or near energized equipment, a low-resistance path underfoot is a personnel safety question, and specs often call for a dissipative floor precisely to keep resistance in the path. Areas handling energetic materials or flammable vapors tend to go conductive on purpose, because there the goal is to never let charge accumulate.
This is the part most people are missing, and it is why a static-control floor is a different job from a standard industrial epoxy floor installation.
After the slab is prepped, a grounding grid, typically copper strip, is laid across the floor before the coating goes down, and a conductive primer goes over the top in direct contact with it. The conductive layers move charge horizontally until it reaches a grid run, and the grid carries it to a ground connection tied into the building ground at a point the electrical design specifies.
Apex states the capability directly: “For electronics assembly, cleanrooms, aerospace and defense work, and any area with static-sensitive processes, we install ESD / static-control systems with an embedded conductive grid tied to a grounding point.”
The grid layout is not improvised. Spacing, the number of ground connections, and how the grid crosses joints and doorways come from the manufacturer’s details and the electrical design. More than one ground tie is common, so one damaged connection does not orphan the floor.
The ground connection is a permanent, inspectable part of the building, not a wire taped to a column. Document it, so nobody rips it out during the next equipment install.
The grid also goes in during installation. There is no practical way to add one later without taking the floor back off.
Install a conductive coating with no grid and no ground connection and you have built a large isolated conductor. The surface carries charge around efficiently and has nowhere to put it. That is not static control, and it will not survive an audit: the auditor will ask for resistance-to-ground readings and there is no ground to measure.
That is the trap in the phrase “ESD coating.” The coating is one layer of a system that also includes the prepared slab, the grid, the conductive primer, the body coat, the topcoat and the ground connection. Every layer above the grid has to stay inside the electrical range too. Putting a standard sealer or a floor wax over a finished ESD floor is one of the fastest ways to kill it, usually months later, courtesy of a cleaning contractor nobody told.
Electronics assembly is the obvious case: board assembly, rework, test, and anywhere bare components are handled.
Cleanrooms have a second reason: charged surfaces attract airborne particulate, so static control and contamination control are the same conversation, and the floor has to be seamless and low-shedding too.
Aerospace and defense covers avionics, instrumentation and precision assembly. Apex’s industrial page describes this group as needing “ESD static-control and low-dust finishes that hold tolerances under heavy component handling.”
Munitions and energetics are a different problem with the same solution: the risk is not a damaged component but an ignition source near material that must never see one, and the requirements are stricter. Pharmaceutical and chemical operations hit that during powder handling and solvent transfer. Server rooms and data halls need it around staging and spares storage, where hardware gets unboxed and worked on rather than racked.
If none of that describes your operation, you probably do not need a static-control system, and a well-built commercial epoxy floor will serve you better.
This is the only kind of floor whose acceptance criteria are electrical. When it is finished it gets measured: point-to-point readings across the surface, and resistance-to-ground readings back to the ground connection, at multiple locations with the specified instrument.
ANSI/ESD S20.20 is the program standard most US facilities are audited against, with IEC 61340-5-1 as the international counterpart. Those documents govern the control program as a whole, not just the floor, and reference separate test methods for the floor material alone and for floor and footwear measured with a person standing on it. Do not take resistance numbers from an article, this one included. Take them from your spec and your test report.
Readings also move with humidity and temperature, generally rising as the air gets drier, which is why test conditions are part of the method. Ambient conditions matter during the install for the same reason, which we cover in Florida humidity and epoxy floor installation.
And verification is not a one-time event. A compliance program expects periodic re-testing of the control items, floors included, because floors wear, get cleaned with the wrong chemistry, and get a mystery coat of something applied to them. Put the re-test on the maintenance calendar and specify the cleaning chemistry in writing.
A grounded floor does nothing for someone in ordinary rubber-soled shoes. The person is insulated from the floor, and the charge stays on them.
That is why ESD footwear, heel grounders or toe straps go with the floor, and why the two are qualified together rather than separately. The standard test methods measure them as a combination with a person in the loop, because that is the real circuit: person to shoe to floor to grid to ground.
The consequences are mostly procedural. Footwear gets checked at a tester routinely, because heel straps fail and nobody notices. Carts, chairs and workbenches have to be in the system too, since a wheeled chair with insulative casters is just a charged object with a person on it.
The floor is the foundation of the program. It is not the program.
None of the electrical work matters if the coating comes off, and an ESD system takes the grid with it when it fails.
The slab still has to be mechanically prepped, cracks patched, and moisture verified first. Apex describes its industrial prep as taking “your existing slab, mechanically profiled to a Concrete Surface Profile of 2 to 3. Cracks patched. Moisture verified.” That is no different here, just less forgiving, because a delamination is now an electrical failure as well as a cosmetic one. The prep failures behind ordinary coating loss are the same ones, covered in why epoxy floors peel and the prep steps that prevent it.
Moisture vapor from below adds one wrinkle. Where a slab needs a moisture-mitigation primer, that layer is normally a barrier product with no conductive properties, so the build-up has to keep the conductive layer and the grounding grid electrically connected above it. Settle that at submittal, not on the morning of the install.
If you have a spec in hand, the next step is a conversation about your slab, your ground points and your schedule, because the grid and the ground connections get planned before anything is mixed. If you do not have one yet, we can tell you what your system manufacturer and your ESD program will need from the building.
Apex installs industrial systems with in-house crews across FL, GA and SC, including ESD and static-control floors with an embedded conductive grid tied to a grounding point.
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