Line between walls

[Anonymous]

I have an issue with the joint between two walls. The one is a load-bearing brick wall (140mm) and the other is non-bearing brick wall (90mm). They both have practically the same settings, because the 90mm is a duplicate from the 140mm wall. I only changed the thickness and the material. But the material style from the 90mm is again a duplicate from the 140mm wall. And as you can see in the picture, the joint between the two walls is shown with a line. I want to remove this line. How can I do this? Is this because I have "different" materials?

[RDAOU · Accepted solution]

@Anonymous

Several reasons cause this behavior... Material is one of them. A duplicate of a material is treated as a new material so yes it is a reason you are having that line

another reason could be the layer type... Example: one is Structure (1) and the second is Finish (4) or (5)

another reason... Setting wall join to "Don't Clean Joint" would also leave a similar line 

there is a detailed article on Autodesk Knowledge network which can help understand the behavior and join priorities in detail

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Revit-Model/files/GUID-CCDEE011-2A5E-43AC-BD60-8F81CF432A6B-htm.html?_ga=1.187044456.1596701355.1472364764

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2015/ENU/Revit-Model/files/GUID-1CCD1005-CBDA-4338-8D60-489095D4BB25-htm.html?_ga=1.215832151.1596701355.1472364764