Cove moulding covers the joint where the ceiling and wall meet, providing an attractive finish to any room. Affixing moulding is quite easy, although irregular angles can prove difficult. Often, a cove moulding will butt up against a door frame, or run the whole length of the room; however, there may be some instances where the moulding stops, but has nothing to butt up against. In this instance, you will need to build a return.
Set your mitre saw to 45 degrees. Lay the moulding upright on your saw and cut a mitre into the end of the piece.
Make an opposite cut in a scrap piece of moulding, by turning it around on the saw. You will now have two pieces of moulding with mitred ends that fit together to form a 90 degree angle. This is how your moulding will return into the wall.
Measure the distance from the wall to the mitred end of the first piece of coving, and mark this distance from the mitred end of the second piece. This will tell you how long the return to the wall should be.
Set your saw to 0 degrees, and make a cut in the opposite end of the scrap piece you have just mitred. This will make sure that your moulding has a flat edge to butt up against the wall.
Check that the mitred ends join together tightly. If they do, apply adhesive to the mitred edges and stick the two pieces of moulding together.
Apply adhesive to the top and bottom edges of your cove moulding and affix to the wall as usual.