Roof Won't Join

[mmward]

I have 2 roofs at 2 different heights. I was able to connect the other roof super easy, but the left roof seems to be giving me trouble. I have tried using the join/unjoin roof command, but it gives the the error message of "Part of the roof to be joined misses the target face."

Not sure what I am supposed to do now. 

[ToanDN]

Can you share the model?

[mmward]

Here is the model.

[ToanDN · Accepted solution]

I've got to model it as a roof by extrusion and cut by a void, then join with the left roof.

https://knowledge.autodesk.com/community/screencast/3f5abcb7-13a5-49c2-a589-11263d1cb595

[constantin.stroescu]

You can try to snap on the Wall Face from bellow instead of pick on the Roof Face (sometimes this works)

If you can not manage so , I suggest to use Void Component > Roof :

• extend the lower roof into the main volume.
• draw a vertical Reference Plane so to be perpendicular on the Target Surface on which you want to join and name it somehow
• then in the Elevation View parallel with this Reference Plane create a Model in Place Component> Roof > an Extrusion Void . Adjust it in a 3d view to cat the lower roof following the profile of the main building
• Select the lower roof and the Void and apply Cut.

[mmward]

Thanks! That worked perfectly!