Hi, Thanks for the advice. I should have mentioned that I have made everything into components already. It does help though, to put the components into layers. The warning mentioned is "Constrained on 1 from point." It shows up as I am about to complete a line. What does it mean exactly? I've reviewed my geometry and found little slivers of added thickness in the walls caused by not using the push/pull tool correctly (most likely). Once the extra lines were removed so the faces were on the same plane, the redrawn lines resulted in the faces appearing as expected. SketchUp is soo smart and I'm not.