We are often asked 'Why cope corners'? Is it mandatory? Well, yes and no.
For corner pieces, cutting both pieces of trim at 45 degrees makes sense in theory. But in the real world, two walls rarely form a perfect 90-degree angle. So getting two miters to meet tight and right is challenging or impossible. And even if you get it tight, it will probably open as wood naturally shrinks or swells.
Coped corners take these elements out of play.
Add the EZCrown Molding Installation System, and you can have easily crown any room in a short amount of time. And save a huge amount of money.
For those of you who like to read, this is an excellent 'How to' article on coping corners from Construction Pro Tips.