Join walls with different thickness

[SHAGGYR]

Hello, I have the following problem.
I create a project of my flat, and of course as any other flat i have inner walls which are thiner than the outher walls of the building.
And of course my inner walls inside the flat cross outer walls.
I don't get how can I make those walls merge, they simply lie on on top of another and collide.
This makes the project look bad and ruins all the dragging / resizing.
I looked in the docs and watched a couple of tutorials but I can't find an answer. Could some1 help?
I leave a link to pasteboard to share how my project looks like.

[Puybaret]

Make the length of the thin walls smaller, or use the same pattern as the one you used for thicker walls.

[SHAGGYR]

Changing pattern to the same did the trick!
Thanks a lot.