First, diagnose
An interior system routes water that has already gotten past Carmel's clay-heavy soil to a sump, rather than trying to stop the clay from swelling in the first place.
The full scope
- Perimeter drain routed to a sized sump
- Capacity matched to Hamilton County's clay runoff
- Compatibility with the existing slab and footing
- Discharge routed well away from the foundation
- Access left for future maintenance
Worth noting locally
Because Carmel's basements span a fifty-year construction boom, drain age and design vary block by block, not just house by house.