Where should you not put crown molding?

While crown molding adds immense architectural elegance and visual sophistication to many rooms, there are specific environments and spatial conditions where installing it is generally discouraged. Rooms with extremely low ceilings, such as basements or older homes with seven-foot clearances, should typically avoid heavy or ornate crown molding because the visual weight and downward drop of the trim can make the ceiling feel oppressive, cramped, and even lower than it actually is. Additionally, installing traditional wood or plaster crown molding in high-moisture spaces lacking proper ventilation, such as directly above unvented steam showers or inside wet saunas, can lead to warping, rot, mold growth, and premature degradation unless moisture-resistant PVC or polyurethane materials are used. Furthermore, in ultra-minimalist or hyper-modern architectural designs featuring completely flush surfaces and clean glass walls, traditional crown molding can clash stylistically with the intended aesthetic, making simpler shadow-gap details a much more appropriate choice.