Unwanted line between wall and slab,how 2 get rid of?

[Mats_Knutsson]

See attachment. I would like to get rid of the little line where the wall meets the slab. I somewhere feel I should know how to do this but I can't so please help! Materials are the same, pen colours are the same.
Best regards,
Mats

[Anonymous]

It is a shame that these workarounds are still necessary. I do look forward to someday when ALL coplanar faces of like material are automatically cleaned up.

[TomWaltz]

I never realized there was a problem like this with slabs and walls when they are side-by-side. Thats' kind of annoying...