What are the different types of molding?

Architectural molding encompasses a wide variety of specific profiles designed for different locations and functions throughout a building's interior and exterior spaces. Crown molding is installed at the intersection where walls meet the ceiling, providing an elegant transition and hiding any drywall gaps. Baseboards run along the bottom of interior walls where they meet the floor, protecting the wall base from damage and covering flooring expansion gaps. Chair rails are installed horizontally across walls at roughly chair-back height to prevent furniture from scuffing the paint and to divide wall surfaces for wainscoting. Casing provides decorative framing around doors and windows, concealing the rough framing gaps. Other specialized profiles include quarter round for small floor gaps, picture rails for hanging artwork without damaging drywall, and panel molding used to create sophisticated geometric wall boxes and decorative accent features.