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Door Terms

•Interior doors are usually 1-3/8" thick and have a "hollow" core. A wood frame is filled with a matrix of corrugated paper and covered with a thin veneer.

•Exterior doors are usually 1-3/4" thick and solid core – again a thin veneer laid over a frame, but with some other material filling the door cavity. This filler could be foam or composition board or even lumber. Other popular exterior door choices include solid wood, steel and fiberglass.

•French doors are mostly glass, with one, to as many as fifteen panes set in wood sash.

•Insulated French doors have dual layers of glass, usually with a dividing grille installed between layers.

•Colonial doors have raised decorative wood panels that resemble doors popular in colonial America. Six or nine panels are most common.

•Flush doors are smooth and flat, with no decorative treatment.

•Louver doors include wood louvers that allow air to circulate but obscure vision, an advantage for enclosing a closet, pantry or water heater.

•Grilles (grids) are laid over the glass in a single-pane French door to create the illusion of multiple glass panes.

•Paint grade doors are usually primed at the factory and are designed to be painted after installation.

•Unfinished doors can be stained or given a clear coating, such as urethane, to enhance the beauty of the wood.

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•Entry doors are decorative exterior doors, often with glass panels set in a border of brass caming.

•Slab doors are the door alone, as distinguished from prehung doors which are sold with jamb, hinges, trim and threshold attached.

•Prehung doors are sold as a package with the door, jamb, hinges, and trim already assembled.

•Brick mold (also called stucco mold) is the casing around each side and head on the exterior side of an exterior door. Prehung doors are sold either with or without brick mold.

•Crossbuck doors have a raised X design in the bottom half of the door.

•Bar (café) doors are familiar to everyone who has seen a Western movie.

•Ventilating doors include a window that can be opened.

•Fire doors carry a fire rating and are designed to meet building code requirements for specialized occupancies, such as hotel rooms or dormitories. Code also requires that fire doors be used between a house and an attached garage, and that an automatic door closer is installed.

•Bi-fold doors on closets fold in half when open, revealing nearly the full interior.

•Bypass closet doors slide left or right, never revealing more than one-half of the interior.

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•Hardboard doors are made of composition wood veneer, the least expensive material available.

•Casing is the trim around each side and head of an interior door. Casing covers the joint between jamb and the wall.

•Finger joint trim is made from two or more lengths of wood joined together with a finger-like joint that yields nearly as much strength as trim made of a single, solid piece.

•Hardwood doors are finished with a thin layer of true hardwood veneer.

•Lauan doors are finished with a veneer of Philippine hardwood from the mahogany family.

•Stiles and rails form the framework of a flush door. Stiles are vertical and every door has two; a lock stile and the hinge stile. Rails run horizontally at the top and bottom of the door.

•Molded face doors have decorative molding applied to at least one side.