Hi! I would like to attach a plane surface to my grid or Brep. I want to create a ceiling for my L shaped building that has a parametric offset in z direction and it should stick out in x and y direction. I know how to make the ceiling stick out for a building with rectangular shape (its below in the grasshopper script) BUT I don’t know how I can attach it to the L shaped grid or to my Brep that is based on the grid. Can anyone help? Thank you in advance.
L shape building with ceiling and overhang.gh (23.2 KB)
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I wanted to have the ceiling in the same shape as the grid, so it is L shaped as well 
Haha of course, makes a lot more sense
Here’s one way to make it
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sorry, I think the question was a little poor described. Thank you very much! That really helps!