Structural slab repair and prep work so your coating lasts 20+ years. The hidden step that separates a 3-year floor from a 15-year floor.
If you have looked at a Rapid City garage floor that is 10 years old, you have seen the damage. The salt has scaled the surface, the freeze-thaw cycle has opened hairline cracks into structural cracks, the corner where the snowmelt pools in winter has spalled down a quarter-inch, and there is pitting where road salt has eaten the cement paste away from the aggregate. None of those defects can be coated over directly. They need structural repair first.
We treat concrete repair as a standalone service for two reasons. One, some homeowners are not ready for a full epoxy or polyaspartic floor but want to stop the damage and stabilize the slab. Two, even for full coating jobs, the prep work is what determines whether the floor lasts 3 years or 15 years, so we do it as a discrete and documented step.
Our repair process uses polyurea joint filler for control joints, structural polyurea or epoxy mortar for cracks wider than 1/8 inch, and a hand-troweled polyurea repair compound for spalled corners and pitted areas. All defects are mechanically routed out first to expose sound concrete, then filled flush. The repair compound cures harder than the concrete around it, which means it will not pop out when the slab moves with the freeze-thaw cycle.
We also handle slab moisture mitigation when needed. About 1 in 5 Rapid City garage slabs have moisture issues, either from poor original drainage, a high water table near Rapid Creek, or hydrostatic pressure. A moisture-mitigating primer installed before any coating is the only thing that prevents osmotic blistering down the road. We test every slab before coating and price moisture mitigation transparently when it is needed.
Pricing for repair-only work depends on linear feet of cracks and square footage of spalling. A typical 2-car garage with moderate damage runs $400 to $900 in repair work. Combined with a full coating install, repair is included in the flat quote at no separate charge.
Full walk-through, moisture test, photograph and measure every defect. Written report and flat quote.
Cracks and pits are routed out with diamond blades to expose sound concrete and create a keyway for the repair compound.
Polyurea joint filler in control joints, polyurea or epoxy mortar in structural cracks.
Hand-troweled polyurea repair compound rebuilds spalled corners and pitted areas flush with the slab.
If slab moisture testing flags hydrostatic pressure, a moisture-mitigating primer is installed before any coating.
Yes. We offer concrete repair as a standalone service. For homeowners who want to stabilize the slab and stop further damage but are not ready for a full coating, we will repair cracks, fill joints, and rebuild spalled areas. The repair work is durable on its own and can be coated later at no penalty.
Repair-only work on a typical 2-car garage with moderate damage runs $400 to $900. Heavy spalling or extensive cracking can push that to $1,500. When repair is part of a full coating install, it is included in the flat quote at no separate charge.
Coating an unrepaired crack means the crack telegraphs through the resin within a year. Coating a spalled area means the coating is bridging an air gap and will crack under the first hot tire. The repair step is what makes the difference between a 3-year floor and a 15-year floor. We do not skip it.
Some Rapid City slabs have hydrostatic pressure pushing moisture vapor up through the concrete. If you coat over that without mitigation, the moisture forms osmotic blisters under the resin and the floor delaminates within 18 months. A moisture-mitigating primer chemically seals the slab and prevents the problem. We test every slab before quoting.
Yes. Control joints are filled full-depth with polyurea joint filler, which stays flexible enough to allow normal slab movement but rigid enough to support the coating across the joint without telegraphing. We never leave open joints under a resin floor.
For a standalone 2-car garage repair, typically 4 to 6 hours. The polyurea compounds cure in 1 to 2 hours so the floor is walkable the same day. When combined with a full coating install, repair is part of the same install day or the morning before coating.
Rapid City garage floors crack every spring because of the freeze-thaw cycle, calcium chloride, and untreated micro-fractures. Structural polyurea injection stops it for good.
Free on-site visit. Written quote within 24 hours. No high-pressure sales.