Piers have to reckon with dolomite, not just soil
Where Joliet's dolomite sits shallow, a pier system may bear on rock at a fraction of the depth it would elsewhere -- get that wrong and a system sized for deep till underperforms on a shallow-bedrock lot.
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
Joliet's ground, from the piers' point of view
The dolomite exposed during the Illinois and Michigan Canal's construction still sits close to the surface across much of Joliet, under a glacial-till layer of varying thickness. Support systems here need to be matched to that till depth lot by lot, not assumed from a neighbor's job.