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Aluminum
A malleable metallic element, bluish silver-white in color, that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation. It is the most abundant metal in the earth's crust.
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| Awning Sash
A frame in which the panes of a window are set. The frame is built in such a way that the bottom swings outward in a window frame.
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| Awning Window Unit
A combination of a frame, one or more awning sashes, weather-strip and an operating device assembled as a complete and properly operating unit; screens and/or storm sash are optional; the unit may contain one or more fixed or non-operative sashes in combination with the operative sash.
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| Baluster
A square or turned spindle that supports a stair rail.
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| Basement Sash
A frame in which the panes of glass are set. The awning style sash usually consists of one, two or three vertical lights. It is designed to swing inward from the top or the bottom.
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| Basement Window
A sash unit, usually in-swinging from the top or bottom. Typically used for basement or cellar sash openings. It usually consists of one, two or three glass lights, and may include screens or storm panels.
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| Bay Window
A bay window is made up of three or more windows. The side or flanker units project out from the building in 30, 45, or 90 degree angles. The center is parallel with building wall and is made up of one or more windows. All the units can be stationary, operating, or any combination thereof.
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| Bead
A semicircular or rounded profile worked on wood; also a small molding to secure glass or panels to doors, hence glass bead.
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| Beveled Raised Door Panel
A raised door panel with the edges of the raised face at an angle or radius.
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| Bifold Door
A segmented, hinged door that folds into itself and slides on a head track to the side when opened. A typical 4-0, 5-0, or 6-0 door is made up of four door segments: two folding to the right and two to the left. This door was first used during the 19th century.
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| Bottom Rail
A horizontal rail at the bottom of a sash, door, blind or other panel assembly.
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| Bow
A form of warp that is in excess of one-fourth inch in the plane of the door itself. The measurement is taken from the widest point of a straight line from end to end of the door.
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| Bow Window
A series of four or more adjoining window units, commonly five in number, installed on a radius from the wall of the building.
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| Butt
A door hinge with one leaf mortised or routed into the door frame jamb and the other into the edge of the door. The leaf of the hinge can be radiused or square. A standard residential interior hinge measures 3 1/2 x 3 1/2 inches when laid out flat. A standard residential exterior hinge will measure 4 x 4 or 4 1/2 x 4 1/2 inches.
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| Café Door
A single door or pair of half-width doors, hung in the middle of a doorway, that swing both inward and outward to allow entry; similar to saloon doors in the Old West.
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| Capital
A capital marks the termination of a shaft and beginning of a horizontal support of a beam, lintel or arch and support; the same as a cap.
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| Casement Sash Unit
A combination of frame, casement sash, weather-strip and operating device assembled as a complete and properly operating unit; screens and/or storm sash are optional.
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| Casement Window
A window in which the frame is built in such a way that the sash can open out like a door when installed in a window unit. Historically, casements were the first working windows. These windows were strategically placed throughout a house to capture breezes and direct them through the rooms. Screens were placed internally to prevent bugs and dirt from entering the house.
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| Casing
Molded or surfaced four-sided wood pieces of various widths and thicknesses, used for trimming door and window openings. A casing may be classified as exterior or interior as far as window and exterior door frames are concerned.
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| Check Rail
In double-hung windows, this is the bottom rail of the upper sash and the upper rail of the lower sash, where the lock is mounted. It is also know as a Meeting Rail.
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| Cladding
Aluminum or vinyl material attached to the outside of a window which creates a more durable, long-lasting window. Cladding is factory-applied in many colors and does not require painting.
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| Column
An upright supporting or decorative member, which is circular or rectangular in plan and consists of a base, a shaft and a capital. When columns extend two or more stories to the full height of a structure, the column is sometimes termed a heroic column.
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| Combination Door
A door that is made with a wood panel as the bottom half and a screen for ventilation as the top half. Also called a ventilating door.
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| Composition Door Panel
A door panel of a material other than solid wood or plywood.
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| Condensation
Moisture or humidity in the air that forms on a cool surface such as a pane of glass. When moist air comes in contact with a cool surface it shrinks. If it shrinks enough to reach 100% humidity or the dew point, moisture will form on the cool surface. This is demonstrated when the out side of a glass of ice tea sweats.
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| Core
The center of plywood or crossbanded construction; it may consist of lumber (solid or glued), particle board or veneer. Also core unit; innermost layer in veneered door construction.
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| Cove and Bead
A molding profile consisting of a cove and a bead; also called cove with a bead; glass bead or stop.
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| Crossbuck
The panels of a door separated by intersecting diagonal rails and so arranged to simulate a sawhorse, especially one with the legs projecting above the cross bar; an arrangement of panels similar to the Roman numeral X; also sawbuck.
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| Dado
A groove or rectangular section for receiving the end of a board.
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| Decorative Entry System
An entryway made up of a door in a frame, one or two sidelights, and a transom.
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| Delamination
A separation of piles or layers of wood through failure of the adhesive.
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| Density
The weight of a substance per unit volume; for example, 23 lbs. per cubic foot.
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| Diagonal Rail
A diagonal rail of a crossbuck or sawbuck of a panel or sash door.
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| Dimensional Stability
The ability of a material to stay put or to resist changes in its dimensions due to temperature, moisture or physical stress variations; stability of a material.
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| Door
A millwork assembly of stiles, rails, and panels that swings, slides, tilts up or folds in order to close an opening in a wall or cabinet. A modern door may be used on the exterior or interior, and may be either flush or panel type. Historically, there were two types of doors: ledge and brace (or batten) and paneled doors. An exterior door used before the 17th century, the ledge and brace style was constructed from vertical panels that were held together with a Z-shaped brace nailed to the back. A Tudor-style door is similar to the ledge and brace except that it is held together by oak planks across the back instead of a Z-brace. In the 1600's, the paneled door came into use as an interior door. The first examples were made with two or four panels, but then near the end of the 18th Century, a six-paneled version was made, called a Georgian door.
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| Door Casing
Same as casing; may be an interior or exterior door casing; exterior door casings are installed only on the outside of exterior door frames, especially on wood facing wood-frame exterior walls.
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| Door Frame
A group of wood parts machined and assembled to form an enclosure and support for a door; door frames are classified either as exterior or interior door frames.
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| Door Jamb
The part of a door frame that surrounds and contacts the edges of the stiles and the top rail of a door. Jambs may be classified as head or side jambs and as plain or rabbeted.
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| Door Panel
A sheet of thin lumber, plywood or composition material inserted into the frame formed by the stiles, rails and mullions of a door.
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| Door Skin
A face panel (usually two or more plies) of a flush door.
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| Door Trim
The moldings required to finish or trim the side of a door frame, consisting of two pieces of side and one of head casing.
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| Double-Glazing
Two panes of glass separated by an air space; double glazing may be accomplished by storm sash or insulating glass; this term sometimes refers to storm sash.
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| Double Glazing Panel
A removable glass panel that allows insulation and condensation control.
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| Double-Hung Window
Two sashes, top and bottom, that slide vertically past each other, joined by a meeting rail and held in any open position by means of weights or one of several types of balancing devices.
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| Dovetail Joint
A joint formed by inserting a projecting wedge-shaped member into a correspondingly shaped cutout member.
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| Entrance
An exterior door frame with or without transom or sidelight (usually used for the main or front entrance of a structure) with decorative exterior trim; trim may include pilasters, entrance head or cap or a decorative exterior casing.
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| Entrance Door
A door on the front or main entrance of a structure; may be single or paired.
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| Entrance Head
The portion of the entrance above the door opening; also called entrance cap; entablature; commonly used when the head is other than a pediment.
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| Exterior Casing
A casing that trims the exterior of a window or door frame and serves as the boundary molding for the siding material; forms a rabbet with the blind stop or a jamb for the screen.
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| Extrusion
A form produced by forcing material through a die.
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| Fabricator
The person or firm that assembles all the component parts into a complete window, door or sash unit.
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| Fenestration
The placement (or arrangement) and sizing of the windows and exterior doors of a building. In Greek architecture, windows began as simple openings in temples. These openings began to contain glass in the 13th century, when clear glass was available for buildings such as Westminster Abbey. Another important shift in fenestration occurred in the 20th century when large windows became important components in commercial buildings.
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| Fiber Board
A broad term used to describe wood sheet material of widely varying densities manufactured of refined or partly refined wood fibers.
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| Fingerjoint
A series of fingers machined on the ends of two pieces to be joined, which mesh together and are held firmly in position by a water-resistant adhesive.
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| Finish
The interior or exterior finish of a structure; the finished or actual size of a piece of lumber; the protective coating given a wood member; upper or select grades of softwood lumber.
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| Fire-Rated Door
A door that is required by building codes for certain parts of a building - between the garage and the house for residences- and takes a certain number of minutes to burn; usually 20, 60, or 90 minutes.
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| Fixed
Refers to windows that are non-venting or inoperable.
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| Flat Door Panel
A door panel consisting of a flat piece of plywood, solid wood or other material in contrast to a raised door panel.
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| Flitch
A thin piece of wood, used often as a veneer.
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| Flush Door
A door consisting of a core, cross-banding and flat-face veneers, or a door consisting of a core and flat-face veneers only.
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| French Door
An interior or exterior door consisting of stiles, top and bottom rail and divided glass panels or lights; often used in pairs as a casement or terrace door. In the 19th century, glass was being added to door construction, mainly in French and German homes, on internal doors leading to rooms containing more natural light, such as conservatories, glass houses and vestibules.
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| French Casement Window
Two casement sashes, each hinged on one stile and opening in the middle but with no center mullion. This allows a smaller rough opening to make egress since there is a large unobstructed opening.
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| Garage Door
A multi-paneled door built in horizontal sections that extend the width of the door, and which slide upward on a metal track and curve at a right angle, stopping when parallel to the garage ceiling, to allowing a car to enter or exit.
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| Garden Window
A box-shaped window that hangs outside the house and can be used as a greenhouse for plants. It has a slanted glass roof that pulls in heat and light from the sun.
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| Glazing
The insertion of glass into sashes and doors. Glazing also refers to the lowest quality of plate glass. The purpose of glazing is to retain the glass adequately under the design load, provide effective weathering sealing, prevent loads or pressure points on the glass resulting from building movement, prevent glass-to-metal contact, and minimize glass breakage from mechanical or thermal stress.
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| Grain
An arrangement and direction of alignment for wood elements or fibers; can be straight or spiral grain; also used loosely to indicate texture.
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| Gliding Door
A door that opens by sliding along a horizontal track, either in the floor or on the ceiling; often found in rooms with limited space and where a door opening inward into the room cannot be used. Gliding doors were first put into use at the end of the 19th century.
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| Hand
A term describing the swinging direction of a door as one stands on the side of the door from which security is desired, namely the outside.
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| Hardboard
A board material manufactured of wood fiber, which is then refined or partly refined to form a panel having a density range of approximately 50 to 80 pounds per cubic foot under carefully controlled optimum combinations of consolidating pressure, heat and moisture so that the board produced has a characteristic natural ligneous bond.
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| Hardwood
One of the botanical groups of trees that has broad leaves in contrast to the needle-like leaves of the conifers or softwoods; hardwoods are deciduous (they shed their leaves in the fall or at the end of each growing season).
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| Hinge
A jointed or flexible device on which a door or window turns. The earliest known hinges were T-shaped devices called strap or cross-garnet hinges. They were made of wrought iron with a cross bar fixed vertically to the door frame, and attached with nails to the door. In the 18th century, hinges for interior doors were H-shaped or L-shaped, and attached to the door with nails.
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| Hip-Raised Door Panel
A raised door panel with the edges of the raised face perpendicular.
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| Hollow-Core Flush Door
A flush door with a core assembly of strips or other units of wood, wood derivative or insulation board, that supports the outer faces and has intervening hollow cells or spaces.
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| Horizontal Light
A light or cut-out formed by a horizontal bar extending from stile to stile of a sash or door.
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| Horizontal-Gliding Window
Two or more sashes that slide horizontally past each other; one or more of the sashes may be fixed or inoperative or all the sashes may operate; in a closed position, the sashes come together to form a vertical meeting rail.
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| Inner Casing
An entrance member that fits over the outside edges of the side and head jambs, thereby providing a base for the pilasters; an entrance casing nearest to the opening that provides a base for the pilasters.
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| Inner Frame
On a panel door, the intermediate panel member between the stile and door panel that accentuates the sticking of the door.
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| Insulating Glass
Two or more pieces, lights or panes of glass separated by a hermetically sealed air space, typically 3/16 to 1 inch wide. Manufacturing of insulating glass began in 1930.
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| Interior Casing
A casing that trims the interior of window and door frames; three pieces of casing are required, namely two of the side casing and one of the head.
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| Intermediate Rail
A rail of a door located between the top and bottom rails.
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| Jalousie
A series of small horizontal overlapping glass slats, sections, jalousies or louvers held together by a metal end frame attached to the faces of the window frame side jambs or door stiles and rails.
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| Jamb
The top and two sides of a door or window frame that contact the door or sash.
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| Joint
The joining of two pieces of wood by nails, glue, adhesives or other means; joints may be joined end to end, edge to edge, end to edge, or end to face.
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| Kickplate
A thin, polished metal plate applied to the bottom rail or bottom of a door to prevent denting and soiling of the wood surface caused by the kicking action of persons opening the door; kickplates may be applied to one or both sides of a door.
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| Kick Rail
A rail located approximately 10 to 12 inches from the bottom of a hollow-core flush door frame, used primarily on institutional doors.
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| Kiln-Dried
Anything that is wood seasoned in a kiln by means of artificial heat, humidity and circulation; kiln-dried wood may refer to wood with various moisture content percentages.
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| Knocked-Down
Unassembled, as contrasted to assembled or built-up.
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| Knot
A branch or limb embedded in a tree and cut through during lumber manufacturing; the size of a knot is determined by averaging its maximum length and width of the knot.
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| Light (also Lite)
A framed opening in a sash or door containing a pane of glass.
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| Lock Block
A solid or glued block of wood the thickness of a hollow-core interior door or steel exterior door stile, which is joined to the inside edge of the stile and to which a lock is fitted.
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| Lock Rail
The intermediate rail of a door at lock height.
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| Louver
An opening with a series of horizontal slats, called louver boards, arranged sloping downward to permit ventilation but exclude rain, sunlight or vision. Louvers can be made in various shapes.
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| Louver Door
A panel door with part or all of the panels replaced by louvers; a blind door.
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| Low-Emissivity (Low-E) Glass
A special type of glass having a transparent material fused into its surface that acts as a thermal mirror. Use of heat-resistant (or absorbing) glass began in the 1950s, as did the use of reflective (or mirror) glass.
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| Millwork
A term used to describe products that are primarily manufactured from lumber in a planing mill or woodworking plant.
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| Moulded
Refers to something worked into a form or shape.
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| Moulding
A relatively narrow strip of wood, usually shaped to a curved profile throughout its length; used to accent and emphasize the ornamentation of a structure and to conceal surface or angle joints.
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| Mullion
A wood or metal part used to structurally join two window or door units.
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| Newel
The main post at the start of stairs and the stiffening post at the landing.
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| Ovolo
A convex profile; usually a quarter section of a circle, as in to the profile of quarter-round.
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| Panel
A wood surface within a surrounding frame. All panels have structural frames, the interstices of which are filled with sheets or fields called panels.
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| Panel Door
A door constructed with panels, stiles, and rails on a wood surface. Combining several smaller components (stiles, rails, loose-fitting panels) into one door allows panel doors to maintain their shape while expanding and contracting with weather and temperature changes. This door style was first developed in the eighteenth century as an alternative to batten doors, which didn't function well under moisture and climate changes.
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| Passage Door
An interior door connecting two inside rooms or used for a closet door; this door type does not have the same strength, insulation or security requirements of an exterior door. Panel construction on passage doors is designed to allow the wood to expand and contract with changes in moisture and temperature; the center panels are allowed to float within the door's frame.
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| Patio Door
A door that opens onto a patio, deck or backyard of a house, usually made of glass to allow for viewing. Originally homeowners asked for glass doors from a glazer, or someone who handles glass. This specialty product was created by distributors in small shops. In the 1960s when aluminum sliding doors became very popular, window manufacturers realized they could make patio doors to fill the openings that used to be filled by solid doors. At that point, the window companies started heavily promoting patio doors, made in aluminum, vinyl and wood. Door companies now also make them in wood, composites and steel.
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| Picture Window
The same as a stationary or fixe |
