What a proper evaluation actually measures
A thorough look at a Naperville foundation covers elevation readings across walls or slab, moisture near the footing, crawlspace or basement condition, and how well grading is moving water off a lot sitting on notably moisture-retentive clay.
What the report should hand you
- 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
Reading Naperville's clay correctly
DuPage County soil testing requirements exist because the clay underlying nearly every Naperville lot is documented as unusually moisture-retentive, expanding when saturated and pulling back when dry. A sound evaluation treats that seasonal swing as the default explanation, not an exception.