thanx richard, yes i did a lot of debugging, but probably wasn’t enough.
i will give that a try

The thing is, this is not the typical run-of-the-mill stuff, so the only real way for me to know 100% for sure what you need to do is through trial and error. That basically means I either have to do it myself, or you have to be the one in charge of trial and error, and supply me (and the forums) with all the information you can. As I’m sure you understand, I would prefer the latter.

So one thing you could try to know whether the problem is the Z position is to use a cube instead of a plane. In a cube, none of the vertices are in the “correct” Z position, but if it still works, we know that they don’t have to be.

I just tested it with a cube and it works

so is there something wrong with my shed mesh?
do i need to rethink or redo my shed?

Thanks for all the help you are providing here

Also Richard, How would I transform the face into Y/Z Plane?