First, diagnose
The first question isn't what to install -- it's exactly where Carmel water is getting past the foundation, since Hamilton County's swelling clay can push moisture through a joint several feet from where it finally shows up on the floor.
The full scope
- Where the water enters versus where it's noticed
- Timing against rain, snowmelt, and grading
- Whether Hamilton County clay pressure is a factor
- Surface source or rising groundwater
- Photos and moisture readings for the provider
Worth noting locally
Carmel's Crosby-Brookston clay loam swells enough after rain that an assessment done on a dry week can miss what a wet week reveals.