I had to install crown in a 16' X 10' room on Sunday. I thought I'd try
new, so I cut a small cross section of the molding and went around the room,
marking the top and bottom of the finished fit on ceiling and wall about every
feet, making sure the back of the sample was as flat to the drywall as
In the corners, I made the marks intersect on the ceiling. It seemed to help
with the installation in that when something was off, the reference marks
exactly what the problem was.