Join Date: May 2007
Location: Fayetteville PA
It sounds like you are using a form of crown
molding and the assumption is that you have a power miter saw. If so then apply the following guidelines. Place the molding upside down on the saw table as in, the surface that will contact the ceiling is on the table of the saw. The surface that will contact the wall is on the rear fence of the saw. Hold it exactly as if it was being installed while you are standing on your head. Now, make the cut. The best way to understand the dynamics of this process is to attempt to make an inside corner with a couple of short pieces until you fully understand the process. It ain't rocket science but it is certainly an acquired talent.