Of course, not all crown moldings are made equal, according to Long Island building supply dealer Contractors Express. These days, this finishing product can be made from wood or PVC, but one material that has gained wide acceptance is medium density fiberboard (or MDF).
Why its prevalence in the industry? To begin with, MDF has no grain patterns or knots, allowing it to easily assimilate into any room. Since the material is uniform from surface to core, it can be machined into highly intricate designs. Furthermore, it can be fashioned into custom lengths, thereby minimizing wasted trim-backs, and allowing contractors to create moldings perfectly suited for each home.