Model falling down issue

[Thor]

Thank you, that really helps - I also want to let you know all the issues was due to my scene scale. It's in meters, have tried exporting the roof and ceiling into a centimeters scene where it works wonders and the binds does what they're supposed to. This has been a very frustrating week but I'm happy to know why it kept calculating things entirely wrong.

Here's a result I was getting in Meters scene: https://i.imgur.com/752HGBh.mp4
Here's a result I was getting in Centimeters scene (slightly different setup, but close enough): https://i.imgur.com/H3tySMZ.mp4