An Epoxy Floor Installation Day in Allen TX from Grind to Cure
Most people book an epoxy floor without any idea what the day looks like, then get surprised when a crew shows up at seven with a machine the size of a lawn mower and a vacuum that sounds like a jet. Knowing the sequence is useful for two reasons. It tells you when to move the car, and it tells you whether the crew standing in your garage is doing the steps or skipping them.
What follows is a normal single bay residential install in Allen, roughly 400 to 500 square feet, on a slab in decent condition. Commercial work runs the same order over more days.
Seven In The Morning, Clear And Mask
Nothing gets coated around an obstacle. Shelving comes off the wall or gets pulled to the center and tarped, the water heater gets boxed, and the bottom four inches of drywall get masked because grinding throws dust straight up the wall.
The garage door gets masked at the track and the threshold gets taped clean. A sloppy threshold is the single most visible defect on a finished floor, and it is decided here, before anyone mixes anything.
Expect the crew to ask where the nearest 240 volt outlet or dryer plug is. Industrial grinders draw more than a standard household circuit will carry.
Eight, The Grind
This is the step that decides whether the floor lasts. A diamond grinder opens the closed surface of a power troweled slab so the primer has somewhere to key into. The target is a concrete surface profile of 2 or 3, which feels like 60 grit sandpaper under your palm.
You will hear the machine change pitch as it moves from open concrete to a sealed patch. Old sealers, glue from a previous tile job, and paint all have to come off completely. Partial removal is how you get a floor that adheres in most places and lifts in a rectangle where the glue was.
Edges and corners get done by hand with a smaller angle grinder, and this is the slow part. A crew that finishes edging in ten minutes did not edge.
Dust should be nearly invisible. Modern grinders run to a HEPA vacuum, and a shop vac on the end of a grinder is not the same equipment.
Ten, Chasing Cracks
Any crack wider than a credit card gets cut open into a V, vacuumed, and filled with a semi rigid polyurea that cures in about twenty minutes and can be ground flush.
Filling a crack without opening it first is cosmetic. The filler sits on the surface, the crack keeps moving underneath, and it reappears through the finished floor within a year.
Spalled areas and pop outs get patched with a cementitious repair mortar at the same time. On older Allen slabs, and there are plenty poured in the eighties out toward Bethany, this stage takes longer than the grind did.
Eleven, Moisture And Primer
A quick moisture read happens before primer goes down, usually with a meter for a spot check. On a slab with any history of dampness the honest answer is a calcium chloride kit or an in situ probe run days earlier, not a meter reading taken while the crew waits.
Collin County clay holds water and pushes it upward through the slab. Vapor coming up under a cured film is what separates coatings from concrete, and it is invisible until it is a bubble.
Primer goes down thin and fast. On a warm day it is ready for the next coat in under two hours.
One In The Afternoon, Base And Broadcast
The pigmented base coat gets rolled in sections, and the flake goes into it wet. Broadcasting is done by hand, thrown upward so the chips fall flat rather than edge on, and a good installer walks the section throwing to refusal, meaning until the floor will not take another chip.
Full refusal matters. A partial broadcast leaves resin visible between flakes, which reads as blotchy once the clear goes on and cannot be fixed without recoating.
This is the loud part of the day for the homeowner, because it is the part where a garage stops looking like a garage.
Three, Scrape And Vacuum
Excess flake gets scraped off with a flat blade and vacuumed up. The scraping knocks down the sharp edges of the chips so the clear coat can lay flat over them.
Skipping it produces a floor that feels like sandpaper underfoot. It is a common shortcut on cheap jobs because it is an hour of unglamorous work with nothing to photograph.
Four, Clear Coat
Two clear coats go down, or one heavy coat depending on the system. Polyaspartic is normal here because it cures fast enough to close up the same evening and holds color under the strip of sunlight that comes through most garage doors.
Pot life is the constraint. Above about ninety degrees a polyaspartic batch can go from pourable to unusable in under fifteen minutes, which is why installers in North Texas start early and mix small through the summer.
The Cure Clock
The day ends here, but the floor is not finished.
| Stage | Typical timing | What you can do |
|---|---|---|
| Tack free | 4 to 8 hours | Nothing, stay off it |
| Foot traffic | 12 to 24 hours | Walk on it |
| Light items | 48 hours | Shelving, boxes back in |
| Vehicle traffic | 3 to 5 days | Park on it |
| Full chemical cure | 7 days | Wash it, spill on it |
Parking early is the most common way a new floor gets ruined. A tire that has been on a hot road transfers heat into a film that has not fully cross linked, and it lifts a tire shaped patch out of the finish. Waiting the extra day costs nothing.
The Equipment Tells You The Job
A planetary grinder running three or four heads, paired with a HEPA rated dust extractor, is the baseline for a floor this size. A single head hand grinder can do a bay, slowly, and a crew that arrives with only one is either underestimating the slab or quietly planning to acid etch instead.
Look for a spiked roller and a notched squeegee for the base coat, and look for spiked shoes. The shoes are the giveaway. Without them nobody can walk into a wet section to broadcast flake evenly, which means the throwing is happening from the perimeter and the middle of the floor will come out thin.
Mixing should happen in a bucket with a drill paddle against a timer rather than by eye. Epoxy is a ratio product, and a batch that was under mixed stays soft in patches for the life of the floor.
What Should Be Documented
A crew that does the work is usually happy to show it. Before and after shots of the grind, a photo of the crack chase before it is coated over, and the product data sheets for what actually went down are all reasonable things to ask for.
Recent local work is worth looking at too. Allen Prime Epoxy Flooring posts dated job photos from around town, which is a simple way to see a grind profile and the finished floor from the same address rather than a stock gallery of somebody else’s garage.
The written warranty should name delamination specifically. A warranty against defects in materials is close to meaningless, because materials are almost never what fails.
When The Day Runs Long
Not every install finishes in one day, and the reasons are usually legitimate.
A slab that turns out to have an old sealer under the paint doubles the grind. Heavy rain the week before can push a moisture reading out of range, and the correct response is to stop and test properly rather than coat over it. Temperatures below fifty degrees slow the cure enough that the clear coat gets pushed to the next morning.
The warning sign is not a crew that takes an extra day. It is a crew that hits an obstacle and keeps going on schedule anyway.
Common Questions
Can I stay in the house while this happens? Yes for the grinding, which is dusty but contained. Solvent odor during the clear coat stage is noticeable in an attached garage, so open the interior door as little as possible for the first several hours.
Does the old floor need to be bare concrete to start? It needs to be bare by the end of the grind. Existing paint, sealer, glue, and previous coatings all come off. What matters is that removal is complete rather than partial.
Why does the estimate change after they see the slab? Because grind time is the biggest variable in the job and nobody can price it from a photo. A slab with three layers of history on it can take twice the machine hours of a clean one.
Is a one day install a red flag? Not for a standard residential bay. The steps above genuinely fit in a working day on a slab in good condition. It becomes a red flag when the square footage is large or the slab needed real repair and the timeline did not move.
Watch the grind and watch the cure window. Everything else on an epoxy install is recoverable, and those two are not.
