William Morris, one of the founders of the movement, was both an architect and a designer. In almost any arts and crafts style bungalow, you can expect to find a Morris chair. One of his proponents, Gustav Stickley, in the U.S. began the "mission" style of furniture that featured solid quality wood with simple straight lines. These same ideals are found in Craftsman style molding; the highest quality materials are formed into straight lines and curved edges.
You can tell if the molding is of the Craftsman school from its simple straight lines and squares and their curved edges. The built-up crown molding creates a cove look to the ceiling, adds dimensions to any room and easily blends with almost any decor.
Nearly all Craftsman style molding is manufactured from hardwoods; however, there are new materials available today. Some are made from polyvinyl composites, which have the same attributes as wood in that the material can be cut to fit and hammered and painted. It is also made to lock and click into place, making installation easier and less expensive.
Craftsman style molding lends itself to adding great detail and depth to your home. Its simple straight-forward design allows you to have more than one layer of molding. You can add on to the crown molding to give your ceiling the appearance of being higher and your room larger. The same is true for Craftsmen base molding and cornices.