I have a project where I know the low side of my roof truss, but do not know the high side. The high side will vary quite a bit across the building so to get around having to modify sub elements I created two roofs, one with a slope, and one that is flat. The flat roof sits inside the sloped roof. When I try to join the two roofs together, the lines do not disappear, even though the layers being joined are the same material. I have attached picture for reference. Typically when I join other elements with the same material together the line disappears, but in this instance it does not. I have attached some image for context
Two roofs not joined
Two roofs joined
Almost sounds like you are describing a parapet wall the attaches to a sloped base. If so, use the Attach Top/Base Tool and check the "Base" radio button on the Option Bar.
No, Im just trying to get the line of the two roofs to go away when I join them. If im pulling a section i want to see the two roofs as if they were one, instead of seeing a line running through the middle of the two.
Overlap and use Join Geometry. Join Geometry will remove volume and linework at the union.
Ok, so thats my problem, I did use join geometry, and those are the results I got, when I change the join order, the layers disappear altogether.
Here is a screencast of the issue
Uncheck "Common Edges" under the Roof category in the Visibility/Graphic Overrides for the view.
Can you delete all the irrelevant elements from the model and upload it for us to look at?
Sure, I was able to create the same condition in a brand new project with a generic architectural template. I created two roofs, both same materials. both same phasing, except one has a 1/4" slope and the other is flat. I used the "join geometry" command to join the roofs together, but a line still shows up in section.
So it seems that when the base of one roof is entirely within another when you join them, then it will lose it's cut pattern. I wonder if @ToanDN or @barthbradley know why that happens?
In the mean time you can use 1 roof with a variable layer and shape edit to achieve the same thing. See attached.
If you cannot use one roof with edited sub-elements then offset the footprint at one end of the sloped roof outboard slightly the flat roof @Lachlan-JWP mentioned. Below are two roofs joined together.
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