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Glossary of Architectural Terms

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A series of arches.


The lowest of the main divisions of an entablature (See Orders). Also the moulded trim surrounding a door or window.


Squared, hewn stone laid in regular courses with fine joints. Ashlar imitation -- wood siding cut and planned to resemble ashlar.


A platform projecting from an exterior or interior wall of a building above ground level. Enclosed by a railing or balustrade and supported usually on brackets.


A small pillar or column supporting a railing.


Sometimes called a verge board. A board, often ornately decorated, covering the ends of projecting roof timbers where a pitched roof overhangs a gable.


A strip covering a vertical joint between vertical boards. Hence Board and Batten.


A structural opening for a door or window, making up one visual division in a wall.

Bay Window

A projecting bay with windows that forms an extension to the floor space of the interior rooms. On the outside a bay window extends usually to the ground level, distinguishing it from an oriel window which emerges from the building somewhere above ground level. A bay window may be one or more storeys in height.


A small, convex moulding.


That part on a tower or turret where bells are hung.

Bell Cast

With flared, overhanging eaves, bell-shaped.

Bell Tower

See Belfry

Belt Course

A horizontal "belt" formed by projecting course or courses of brick or stone, in a masonry wall, or, of mouldings, in a wood sided wall.


A raised turret or lantern on the top of a house, to afford a view. Sometimes called a Look-out.


A small, convex moulding.

Board and Batten

See Batten


A false front making a roofline, usually on a commercial building.

Bow Window

A curved bay window taking the form of a segment of a circle in plan.


Angular supports at eaves, doorways and sills. In Lunenburg, brackets are often massive and ornately carved. See also Console and Modillion.

Broken Pediment

See Pediment.


In Lunenburg, a local vernacular expression for an overhanging dormer or frontispiece.


A mass of masonry or brickwork built against a wall to give it stability. Buttresses on wooden buildings are usually false and added for decorative effect only.


A projecting cover over a door usually supported by brackets.


A structural member which projects beyond the line of support.