How to cut cove molding with a 20 or 30 degree angle for a Bay Window?

If you are cutting a weird angle, it is often nearly impossible to get a good mitre cut/correct angle. In these circumstances, professional carpenters use an alternate method as follows: Run one side of the molding as a butt against the opposing wall. Then take a coping saw and cut the other piece of molding to follow all of the nooks and curves of the first piece, and then butt this artfully sculpted butt joint up against the first piece. With some skill, you can make it look better than even a good mitre joint.

Good luck.

my best guess is you are putting it in the miter saw wrong, the part that goes against the ceiling would actually be flipped over and go on the base of the saw, the part that goes against the wall would be against the fence

this is the same with crown molding and btw, coped joints work best when they are 90 degree inside corners, its very difficult to cut back coped joints for the angles you're working on, I wouldn't even try

Hey Sciencenut, that sounds like a good idea, will wait for other answers before making yours best answer.

Cutting Cove Molding For Ceiling

electric saw or hand cut miter box ?? what are you using ?? find one piece that works as you like and keep repeating that same cut ... the width of the saw blade will mess-you-up if you are not very careful to that detail ......