Hi. Here is a .csv points file extracted from your Revit file.
I have put a blank line between each face's points. You can see that there are 'shorter' faces and 'longer' ones: The longer ones seem to be the ends of the three sections of cladding.
The points are just as presented by Revit's tessellation function, based on project coordinates, and translated into metres.
Let me know if you need something different.
I'll drop you an email with details, etc.