A friend of mine wants to build 13 inch wall cabinets under a 12 inch flat section of a tray ceiling. Then attach crown to the top of the cabinets that will stick out into the room. Is it possible to do this and have it look nice?
I wouldn’t like the look. I would probably add a flat, horizontal board above the crown, with a decorative edge on the front of the flat board. This would allow for some sort of “termination” point for the crown mold. In the old days, we would add the flat board as I have described, then we would add a plate-rail so people could display their collector plates. I haven’t seen this done in years though. Maybe you could bring it back. See the photo below to get an idea of what I am writing about.