Cove molding can be installed by nearly anyone who has the proper tools to do the job correctly. Cove molding is a concave-profile molding that is usually used at the junction of an interior wall or ceiling. When it is installed on a ceiling, it is referred to as crown molding.
The first step in installing cove molding is measuring to see how much molding is needed. Some people choose to match the molding to the floor or ceiling color or choose a complementary color. Start in one corner and measure the entire distance around. If the room is symmetrical, the total can be found by multiplying the length of the room and the width of the room and doubling it. Several inches should be added to the total to account for waste or mistakes.
With vinyl cove molding, apply adhesive to the back of the molding and press it in place. The corners are folded at right angles before installing to make it easier to apply. Continue around the room until all of the molding has been installed, and make sure your cuts are straight to keep seams hidden.
For crown molding, follow the same process with the exception of corners. In order to cut the corners of cove molding for the ceiling, a miter saw or a miter box should be used to create seams that meet perfectly.