Start with conditions, not a product
Roof runoff, grading, hydrostatic pressure, wall cracks, floor joints, drainage, and interior humidity can create similar symptoms with very different solutions.
Build a complete scope
- Existing conditions and likely cause
- Preparation and protection
- Materials, compatibility, and installation details
- Permits, testing, cleanup, and restoration
- Exclusions, warranty terms, and change-order process
Naperville context
Naperville's DuPage River location and its countywide clay soils shape how water moves around a foundation. Those clay soils are highly moisture-retentive, so water that can't infiltrate has to go somewhere -- often against a basement wall, through a cove joint, or up through a slab. The City of Naperville's stormwater plan leans on storm sewers, detention basins, and overflow routes precisely because the ground itself sheds water slowly, and DuPage County's floodplain rules add another layer of drainage review near mapped risk areas. Basement age matters too: older poured or block foundations built before modern damp-proofing standards behave differently than newer poured walls.