First, diagnose
Not every crack in a Carmel wall is the same problem -- hairline shrinkage cracks and active, widening cracks driven by clay pressure call for different repairs entirely.
The full scope
- Cosmetic shrinkage versus active, widening cracks
- Injection method matched to the crack type
- Monitoring before permanently sealing a crack
- Addressing the clay pressure, not just the gap
- Interior versus exterior repair approach
Worth noting locally
Because Hamilton County clay keeps swelling and shrinking seasonally, a Carmel crack that looked stable last year is worth rechecking.