LOL… Thanks I feel like I am going crazy… I tried uploading a file but it did not like the format (.3ds). would like to show the real problem if I can.
One thing you may find helpful in using the “on face” inference. You start a line, move the cursor to one of your roof facets and press shift. Then you can move to another vertex and hopefully form a face.
Cool, it’s probably worth noting that I didn’t really go through the roof model looking for symmetry. Also, the color by axis thing is virtually worthless at least when it comes to small errors. Don’t trust it.
Another note: if you do what Shep suggested and the faces disappear when you delete the interior edges, that is proof that your points are not co-planar. You can form a triangular face with any three points, but for more than three they must all be in the same plane.