The 3 things I learned when I had my foundation repaired that shocked me were: some states regulate foundation work
https://www.scribd.com/document/1037418377/Top-3-Things-to-Know-Before-Calling-a-Foundation-Repair-Company-for-Basement-Waterproofing-179026
The 3 things I learned when I had my foundation repaired that shocked me were: some states regulate foundation work heavily, licenses matter, and complaint histories warn you.