topic Re: STB Innenwand verbindet sich mit XPS der Kelleraußenwand. Was tun? in Modeling

The interior wall is bonded to the insulation of the exterior wall. What to do?

Natalia_S — Thu, 29 Jan 2026 00:45:25 GMT

STB Innenwand verbindet sich mit XPS der Kelleraußenwand. Was tun?

Hallo ihr Lieben,

ich habe versucht mein Modell für die Ausführung nach bestem Wissen und Gewissen zu bauen.
Wie ihr im Screenshot seht, verbindet sich jetzt im Kellergeschoss die STB Innenwand mit dem XPS der Kelleraußenwand... Das möchte ich natürlich nicht. Jetzt gibt es mehrere Möglichkeiten, dies zu unterbinden aber ich wüsste gerne von euch, was der sauberste Weg ist. Danke für eure Hilfe.

Liebe Grüße,

Moderator edit:

As this was answered already I will translate rather than remove, but please only post in English here, or you can post in the German community.

Hello dear ones,

I have tried to build my model for execution to the best of my knowledge and belief.
As you can see in the screenshot, the STB interior wall now connects to the XPS of the basement outer wall in the basement... Of course I don't want to. Now there are several ways to stop this but I would like to know from you what is the cleanest way. Thank you for your help.

Best regards,

AC 28. Windows 11.

Operating system used: Windows 11 Pro

Re: STB Innenwand verbindet sich mit XPS der Kelleraußenwand. Was tun?

Claudiu Serban — Wed, 28 Jan 2026 16:21:28 GMT

I dont understand german but i understood the problem from the screenshot.

This happens mainly because the inside wall has a different building material from the outside wall. Make sure both composites, both outside and inside, use the same building material for the concrete (it looks like its the same anyway, by its hatch). Same thing goes for the light well walls.

Re: STB Innenwand verbindet sich mit XPS der Kelleraußenwand. Was tun?

Ricardo Lopez — Wed, 28 Jan 2026 21:48:57 GMT

Hi @Claudiu Serban

Check the Priority of the building materials you are using for your composites. Probably the one in the exterior wall is lower than the interior.

Options> Element Atributes> Building Materials...

Re: STB Innenwand verbindet sich mit XPS der Kelleraußenwand. Was tun?

Natalia_S — Thu, 29 Jan 2026 08:38:56 GMT

You're an angel, thank you. That worked out.