Originally posted by Tyleroni:

our Roof and everything we fix/ do after redoing Roof gets reset except for whats on our characters person. whats happening?

Oh you are refering to the "World Destruction" issue... To avoid that, you need to avoid playing with different account on that pc and make sure you keep playing on the same device with the same account and character. Otherwise, you need to save your world files to a different location (usb for example or another file) and copy-paste them back in the Valheim file on worlds when you login with different account or perhaps from a different device.

P.S I don't trust Steam cloud saves, work with backups on each logout and you'll be fine, better be safe than sorry