- Back Band - Rabbeted moulding surrounding the outside edge of casing
- Base - Moulding applied where floor and walls meet, forming a visual foundation
- Base Cap - Decorative moulding installed flush against the wall and top of an S4S baseboard
- Cased Opening - An interior opening without a door that is finished with jambs and trim
- Casing - Moulded or surfaced-four-sided pieces of various widths and thicknesses for trimming out door and window openings
- Corner Blocks - Square blocks used in place of mitering the sides and head casing
- Cove - Moulding with a concave profile used at corners, particularly as a ceiling cornice
- Chair Rail - Wooden moulding placed along the lower part of the wall to prevent damage
- Crown - Highest part of built-in or wall, often above eye level, usually the upper trim on interior walls
- Dentil Block - A smaller rectangle block which can be spaced closely together in a series or in sequence with moulding and projecting like teeth as used in cornice, front entrances and mantels, and crossheads
- Door Stop - Moulding nailed to faces of the door frame to prevent the door from swinging through
- Entablature - The superstructure of moldings and bands which lie horizontally above columns, resting on their capitals
- Hand Rail - Hand support in a stairwell
- Jamb - Top and two sides of a door or window frame
- Mouldings - Ornamental strips used to decorate a surface, often used to accent or emphasize the ornamentation of a structure and to conceal surface or angle joints
- Nosing - Rounded edge of a stair step
- Panel Mold - a decorative pattern, originally used to trim out raised panel wall construction. Most useful fabricated as a frame, surrounding attractive wall coverings for a paneled effect on walls
- Rosette / Plinth Block - Rosette is a decorative block in the upper corner of windows and doors. Plinth is the base block which is placed on both sides of the door resting on the floor
- Shoe Rail - Primarily used for closed stairs with a curb wall. The shoe rail sits on top of the curb wall and the balusters fit inside the shoe rail. The fillet is cut and pieced between the balusters
- Shoe Mold - Quarter round trim applied at the bottom of baseboard where it meets the floor
- Tongue & Groove - Lumber machined to have a groove on one side and a protruding tongue on the other side, so that pieces fit snugly together with the tongue of one fitting into the groove of the other
- Wainscoting - Lower interior wall surface (usually 3 to 4 feet above the floor) that contrasts with the wall surface above it
- Window Sill - Interior trim member serving as a window frame sill cap
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