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Home > Projects & DIY Toolkit > Moulding Glossary

Moulding Glossary

Moulding Glossary
Apron

Apron

A piece of horizontal sash, window trim or casing applied to the wall immediately below the window stool; the apron serves to conceal the joint made by the sash or window frame sill and the interior wall surface


Astragal

An interior moulding attached to a pair of doors or sash in order to prevent swing-through of both doors that ensures a tight fit where the doors meet; a flat astragal is one applied to the face of the meeting stile of the door; a T astragal is rabbeted (notched) to the approximate thickness of the swinging door


Back Band

A narrow, rabbeted (notched) moulding applied to the outside corner and edge of interior window and door casing to create a heavy trim look; this increases both the ornamentation as well as the width of the trim


Band Moulding

A flat, decorative or protective strip that's flush or raised above the surface; this moulding is similar to a panel moulding as well as an apron profile, and it's often used to trim mantels or cabinets


Base Cap

Base Cap

A moulding applied to the top of a piece of base moulding, increasing the decorative look; it's sometimes used with baseboard; base cap may also be used as a panel moulding or multipurpose profile


Base Shoe

Also called shoe or floor mould, this narrow moulding provides a transition between finished floors and walls or cabinets; it protects the base from damage and conceals uneven lines or cracks where the base meets the floor; can be used in place of quarter round

Base Shoe

Base Moulding

Base Moulding

Plain or sprung moulding that's applied where two surfaces come together at an angle; the profile usually consists of a bead and a cove; it's often used in place of crown where the walls and the ceiling meet


Base Mould

A thick moulding used on an exterior door and window as a casing that joins the exterior facing and provides a surface for brick or other siding to butt against; it may be used to form a rabbet for screens, storm sash or a combination door

Base Mould

Cased Opening

Cased Opening

An interior opening without a door but finished with jambs and casing


Casing

Moulded or surfaced four-sides (S4S) trim used around door and window openings; exterior casing is used to trim the exterior of windows and doors, and interior casing is used to trim the interior perimeters of windows and doors

Casing

Caulk

Waterproofing sealant for cracks and joints around window and doorframes


Chair Rail

Chair Rail

Interior moulding applied on the wall about 1/3 of the way up from the floor, paralleling any base or crown moulding, and encircling the room; originally used to prevent chairs from damaging the walls, it's now used more for decorative purposes; it can be made from more than one piece of moulding to build up the effect


Cope

To cut or shape the end of a piece of moulding so that it will cover and fit the contour of the piece it's placed against

Cope

Corner Blocks

Corner Blocks

Square blocks used in place of mitering the side and head casings


Cove

A moulding with a concave profile used primarily where two planes in a construction come together at right angles to each other; it may be used as a crown around the ceiling or on the inside of a vertical corner as a corner guard


Crown Moulding

Moulding used to cover the intersection where the walls and the ceiling meet; usually applied wherever a large angle is to be covered; always installed sprung (angled); also called cornice moulding

Crown Moulding

Dentil Moulding

Dentil Moulding

Moulding featuring a series of small square blocks uniformly spaced and projecting like teeth


Dentil Crown

Crown moulding made up of dentil moulding and other moulding types, such as crown and base or base cap, to make up a crown mould system


Doorjamb

The part of a doorframe that surrounds and contacts the edges of the stiles and top rail of a door


Finger Jointed

A piece of wood that has a series of fingers machined on the ends of the two pieces to be joined that are meshed together and are held firmly in position by a water-resistant adhesive; these joints are made in a mill used to join short lengths together to make long lengths


Frame

All parts that enclose the window sash or door; vertical members are called side jamb, the top horizontal piece is called the head jamb and the bottom horizontal piece is called the sill


Jamb

A vertical perimeter frame of a window or door

Jamb

Lattice

Lattice

A thin strip of wood, or PVC, surfaced on four sides


Lineal Foot

1 foot of a board or moulding regardless of the width or thickness, also called the running foot; usually this term designates non-specified lengths


Miter

An angled cut across the end of a lineal part that's usually done to join with a similarly cut part at a corner; the cutting of the end of a piece at an angle other than a right angle

Miter

Moulding

A narrow strip of wood shaped to a curved profile that is used to accent and emphasize the ornamentation of a structure and to conceal surface or angle joints; it may either be exterior or interior


Mullion

Also called the mull, this is the vertical member of a sash, window or doorframe between openings in a multiple opening frame


Panel Mould

Panel Mould

A decorative moulding used to trim out raised-panel wall construction


Picture Moulding

A narrow moulding along the perimeter of the walls near the ceiling line to support hooks for picture hanging; it can be used to make decorative, formal squares on the wall; it's also called picture rail moulding or picture frame moulding

Picture Moulding

Plinth Block

Plinth Block

A decorative block of wood, thicker and wider than a door casing; used as part of the door trim at the base to enhance the appearance; also called a base block, foot block or pilaster block


Plumb

Exactly perpendicular or vertical; at right angles to the floor of a structure


Primed Moulding

Moulding with a layer of paint or primer applied to it


PVC

Polyvinyl chloride; a plastic material used to make moulded or extruded parts


Quarter Round

Moulding that's 1/4 of a full circle rod and may be used as a base shoe or inside-corner moulding

Quarter Round

Rabbet

A rectangular recess cut or formed along the long edge of a wood part; a cutout along the end or edge of lumber; a groove cut in or near the edge of a piece of lumber to fit the edge of another piece


Rosette

A decorative wood plaque secured to a wall and abutted by the end of a stair rail; it may also be used as ornamental decoration at the bottom of window or doorjambs


Solid Moulding

Nonfinger jointed moulding


Square Foot

The length of an item in feet multiplied by its width in feet


Stool Moulding

A moulded interior trim member serving as a sash or window frame sill cap; these are generally rabbeted


Stop Moulding

Stop Moulding

In window trim, a moulding that holds the bottom sash of a double-hung window in place and can also be used as an apron under window stools; in door trim, a stop is nailed to the faces of the doorframe to prevent the door from swinging through the frame


Wainscot

A lower-interior wall surface that contrasts with the wall surface above it and is generally 3 to 4 feet in height, often with a chair rail added to its top perimeter

Wainscot

Wall Base

Wall Base

A moulding applied around the perimeter of a room along a finished floor; also called baseboard, mop board or skirting; it can be used in combination with shoe moulding to form a two-member base or base cap forming a three-member base

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