Sizing a system for clay that never stops moving
Because DuPage County clay keeps expanding and contracting year after year, a pier or support system underneath a Naperville home needs enough depth and capacity to stay put through that cycle, not just resolve today's visible dip.
What a full repair scope covers
- 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's ground, from the piers' point of view
DuPage County's building code requires soil testing precisely because its glacially deposited clay is so moisture-retentive and prone to seasonal swelling. A support system spec'd for that clay looks different than one built for sandier ground.