Not all foundation cracks are the same — some are cosmetic, others are structural emergencies. St. Clair County Foundation Repair has repaired hundreds of foundations in St. Clair County, IL and knows the difference. We diagnose the root cause, not just the symptom. Get your free inspection and honest assessment today.
📞 Free Crack Inspection — (618) 844-9375The clay soil in St. Clair County, IL expands and contracts dramatically with moisture changes. During wet seasons, soil swells and pushes against your foundation. During dry periods, it shrinks and pulls away, leaving voids beneath your slab or footings. This cyclical movement — amplified by Illinois's freeze-thaw winters — is the primary cause of foundation cracking.
Usually caused by normal concrete curing or minor settlement. Often can be sealed with polyurethane injection to prevent water intrusion. Typically not structural unless wide or accompanied by displacement.
Step-pattern cracks in block walls or diagonal cracks in poured walls near corners indicate differential settlement — one part of the foundation moving more than another. Requires engineering evaluation.
The most serious type — horizontal cracks in basement walls indicate lateral soil pressure exceeding the wall's capacity. Immediate professional evaluation is critical. These can lead to wall collapse if untreated.
For structural cracks, we use two-component epoxy injection to restore tensile strength to the crack — bonding the two sides together stronger than the original concrete in many cases.
For active leaking cracks, expanding polyurethane foam fills the void completely and creates a flexible, waterproof seal that accommodates future minor movement without re-cracking.
For bowing or cracked walls under lateral pressure, carbon fiber straps are bonded to the wall surface — providing enormous tensile strength and halting further movement permanently.
| Service | Starting Price |
|---|---|
| Foundation Crack Inspection | Free |
| Polyurethane Crack Injection | From $500 |
| Epoxy Structural Crack Repair | From $500 |
| Carbon Fiber Wall Reinforcement | From $2,500 |
| Full Crack Repair & Waterproofing | From $3,500 |
Financing available. Call (618) 844-9375 for your free inspection and written estimate.
Don't wait — foundation problems worsen and get more expensive over time. Get your free inspection today.
(618) 844-9375 Schedule Free Foundation Inspection