The 3 things I learned when I had my foundation repaired that shocked me: clay heave can lift slabs, not just sink them

https://www.tumblr.com/strangevictorrealm/815972123754610688/3-things-you-need-to-know-before-you-encapsulate

The 3 things I learned when I had my foundation repaired that shocked me: clay heave can lift slabs, not just sink them, and root moisture removal can trigger upward movement.