No volume of build

woonerf geen volume.skp (223.4 KB)
I don’t get a volume, even after using Solid Inspector (this says “no errors”
I make a group and normaly I get the volume of the building

You have a section where two ‘blocks’ are touching which creates a zero thickness point. You need to resolve it somehow.
That edge is shared by 4 faces and the rules are that no edge can share more or less than 2 faces.


Thanks a lot, it works