Hey there, I’m currently working on a project that requires the construction of perimeter curves along several manually selected wall sourfaces. The problem is that some sourfaces are extending eventhough they don’t in the source model. I’m new to working with dynamo and don’t really get how Revit computes its walls. The only output I need is the perimeter curve of each single wallsegment. Is there a way to connect or crop each sourface? Thanks in advance 
This looks to be associated with how Revit joins walls - the source wall extends through but you only see the boolean surface. Since you are manually selecting faces, but need only the outer curves, it might be easier to just select the edges.
1 Like
Or create Rooms and take it from there
2 Likes
I wish i could, but the sources I work with don’t have rooms integrated 
Thank you for answering
Create some rooms in your own model and set your linked models to room bounding. it makes it a lot easier.
1 Like
I will try it. Thank you