Epoxy Flooring
Concrete Crack Repair: What Happens Before the Coating Goes Down
Every so often a customer asks why our estimate mentions crack repair when they called about an epoxy floor. Fair question. The answer is simple: the coating is only as good as the concrete underneath it. Concrete crack repair is not an upsell, it is the foundation of every install we do, from Toledo garages to production floors across Ohio, Michigan, and Indiana.
Here is what actually happens to your slab before a drop of coating goes down.
Why Concrete Cracks in the First Place
Almost every slab cracks. Concrete shrinks as it cures, soil settles beneath it, and in our region freeze-thaw cycles work on it every winter. Most cracks are cosmetic shrinkage cracks and are easy to fix. Others, wide cracks with vertical displacement or ongoing movement, tell a bigger story about the sub-base. Part of our job during the estimate is telling you which kind you have, because coating over a structural problem just gives you a prettier problem.
Our Concrete Crack Repair Process, Step by Step
On installation day, repair work happens after grinding and before priming. The typical sequence looks like this:
- Diamond grinding. We grind the entire slab to open the surface and expose every crack, spall, and weak spot that filler and paint may have been hiding.
- Chasing the cracks. Significant cracks get cut open with a crack-chasing blade. It looks worse before it looks better, but it gives the repair material clean walls to bond to.
- Cleaning. Dust and debris get vacuumed out. Repair material bonded to dust is repair material that fails.
- Filling. We fill cracks with rigid polyurea or epoxy-based repair compounds that cure fast and can be ground flush, often within the hour.
- Patching spalls and pitting. Popouts, pitted areas, and damaged joints get patched with epoxy mortar so the finished floor is flat and uniform.
- Final grind and inspection. Repairs are ground flush and the whole slab gets a once-over before primer.
What About Expansion Joints?
Control joints and expansion joints are there on purpose, so we treat them differently than random cracks. In most residential garages we fill control joints flush for a seamless look and easy cleaning. In commercial and industrial settings, true expansion joints often need to keep moving, so we honor them through the coating or fill them with flexible joint material rated for the traffic they will see. Which approach is right depends on the slab, and we will walk you through it during the estimate.
Can Every Floor Be Saved?
Most can. Pitted, salt-damaged, oil-stained slabs that look hopeless usually grind out beautifully. The exceptions are slabs with active settling, severe heaving, or widespread structural failure. In those rare cases we would rather tell you the truth and point you toward concrete repair or replacement than take your money for a coating that will not last. That honesty is a big part of why customers choose us in the first place.
The Payoff: A Floor That Lasts
Done right, repairs disappear under the finished system. Flake floors hide them completely, and even solid-color floors show a flat, monolithic surface with no telegraphing cracks. More importantly, the coating stays bonded for the long haul because it was installed over sound, properly prepared concrete.
Curious what shape your slab is really in? Request a free estimate and we will assess the cracks, tell you exactly what repairs are needed, and price the whole job with no surprises.
