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

https://felixqnaw844.opalvector.com/posts/3-things-you-should-know-before-calling-for-foundation-repairs-a-homeowner-s-guide

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.