The 3 things I learned when I had my foundation repaired that shocked me: some contractors upsell piers
https://www.scribd.com/document/1037191333/Foundation-Repairs-Near-Me-3-Key-Things-to-Know-Before-You-Make-the-Call-207481
The 3 things I learned when I had my foundation repaired that shocked me: some contractors upsell piers, independent engineers keep them honest, and measured lift data is gold.