Hi!

There is an important bug in Allplan 2020-1-1, in IFC export of Roof Coverings ( Dachhaut )

This bug affects in ALL kind of combinations of IFC Export settings, and it's showed more clearly when activate "Split multilayered components" in Export IFC options. This bug is in IFC 2x3 and also in IFC 4.

In the video, I compared how walls are exported to IFC (super perfect), and how the Covering roof are exported to IFC (incorrect).

I upload:

- Zip file: Roof Coverings Bug.zip, this zip contents NDW file, screenshots of every IFC settings, and IFCs
- Video: Roof Coverings Bug.mp4

Best Regards,
Xavier Coll
EiPM