I lost my 3rd floor, I can see from the 2nd floor to the roof? How do I get it back?

[zowie123]

Hi,

All my walls are still on the 3rd floor, just my floor is gone, anyone know how to regenerate this without loosing too much?  This 3rd floor is actually an attic floor, so it's a floor floating up in the gable roof. 

 

Thank you,

Zowie

[DRAWZILLA]

Post the plan, someone here will fix it zippity du da., lickity split.

Sounds like a room problem to me.