The 3 things I learned when I had my foundation repaired that shocked me were the difference between helical

https://zanderwpht862.urbanvellum.com/posts/residential-foundation-repair-explained-3-steps-to-take-before-calling-a-company-2

The 3 things I learned when I had my foundation repaired that shocked me were the difference between helical and push piers, when each is used, and why depth beats count.