Concrete Problems We Fix
What types of concrete problems do we fix in Dayton?
The Miami Valley climate is tough on concrete. Below are the four failure patterns we see most often in Montgomery County, and what we do about each one.
Cracking & settling slabs
Hairline shrinkage cracks are normal in concrete, but structural cracks wider than 1/8 inch, or any crack with vertical displacement, usually means the base failed. Across the Dayton area, our heavy clay soils expand and contract with moisture changes, sometimes shifting 1 to 3 inches between wet spring and dry summer. We diagnose with a level survey, then either underseal with polyurethane foam, mudjack, or replace the slab with a properly compacted base.
Internal data: 40% of repair calls trace to base failure, not concrete failure.
Spalling & surface flaking
Spalling -flaking, pitting, and surface delamination -is almost always a freeze-thaw and de-icer problem. Dayton averages roughly 60 freeze-thaw cycles a year per NOAA, and rock salt accelerates the damage by 3 to 5×. We grind the failed surface, apply a polymer-modified overlay or micro-topping, and seal with a penetrating siloxane that resists chloride intrusion. Done right, the repair outlasts the original surface.
NOAA: ~60 avg freeze-thaw cycles per year, Montgomery County.
Sinking or tilting foundation slabs
If your garage slab, basement floor, or porch has tilted or dropped more than 3/8 inch, the soil under it is consolidating or washing out. We slab-jack with high-density polyurethane that lifts within ±1/8 inch and cures in 15 minutes -typically 60-80% cheaper than tearing out and re-pouring, and you can drive on it the same day. We void-fill underneath at the same time so it doesn't sink again.
Industry data: polyurethane slab-jacking costs ~30% of full replacement.
Heaved sidewalks & trip hazards
Tree roots, frost lenses, and clay heave can lift adjacent slabs more than an inch. Dayton municipal code treats anything over 1/2 inch as a liability hazard for the property owner. We either grind the offset down (cheapest), mudjack the low side up to meet the high side, or sawcut and replace the affected panel. For HOAs and commercial properties we can quote whole walking surfaces in a single visit.
City of Dayton: 1/2" max vertical offset on public-facing walks.