We already have thin, one-piece molding on the ceiling. We going to install additional molding on the wall a few inches below the existing molding then paint both strips of molding and the space in between to make it look like several pieces of high-end crown molding.
If you already small one-piece molding on the ceiling, determine the size of the new molding. Here are a few things to consider:
Measure to determine how much molding you'll need and then add 10 percent for waste.
Use a miter box and hand saw to cut the molding to size.
Glue and nail the molding into place with a nail gun. For thicker molding, leave a two-inch gap in between the existing molding and the molding you just added. For thinner molding, such as the type we used, try a four-inch gap.