Concrete cracks are inevitable — but understanding which cracks are cosmetic and which are structural helps you prioritize repairs and protect your property. Here's a guide from the team at RCC Masonry & Concrete.
Types of Concrete Cracks
Hairline cracks (under 1/8") are typically cosmetic shrinkage cracks and pose no structural concern. Control joint cracks are intentional — concrete is designed to crack at these joints. Settlement cracks indicate soil movement beneath the slab. Structural cracks in foundations — especially horizontal or stair-step patterns — indicate serious pressure against the wall and require professional repair.
Repair Methods We Use
For surface cracks in driveways and patios, we use flexible polyurethane sealants that accommodate movement. For foundation cracks, we use epoxy or polyurethane injection that bonds the crack and prevents water infiltration. For wide structural cracks, we rout the crack, install reinforcement, and fill with high-strength repair mortar.
Get Your Cracks Assessed
Not sure if your cracks need attention? Call (224) 441-5284 for a free assessment. We'll tell you honestly what needs repair and what can be monitored.