Sash Window Glazing While all sash window were traditionally single glazed, modern sash windows are now made to take sealed sash double glazing units. Single glazing may be a requirement when restoring/conserving listed buildings, restricted to the accurate representation of its original state. The restoration and upkeep of sash windows are very important to preserving history and […]

Bottom Rail

The bottom rail of the lower sash is deeper than the other rails. This is to allow for the slope of the sill.

Gable Fronted Dormer

This is the most common type of dormer window that can be found throughout many period properties, as well as some newly built. It has a simple pitched roof of two sloping planes, supported by a frame that rises vertically to form a triangular section below the roofline. This can also help to provide more room within […]

Window Sill

The window sill is the bottom horizontal portion of the window. On a wood window this is a thick piece of wood, shaped to a slope of about 7 degrees, the purpose of which is to move water away from the bottom of the window sash where it could leak over a period of time. […]


The stool is a part of the window that is inside the house, not outside. It is flat and extends from the bottom rail of a sash inward. There is generally, no standard width for a sill and can be custom made for a variety of factors. Stools can be made from a number of […]


A jamb in architecture, is the side-post or lining of a doorway. The jambs of a window outside the frame are called “reveals.” Small shafts to doors and windows with caps and bases are known as jamb-shafts.


A balance is the weight of a glazed panel. Usually balanced by a heavy steel, lead, or cast-iron sash weight or counter-weight concealed within the window frame. The sash weight is connected to the window by a braided cotton sash cord, or a chain, that runs over a pulley at the top of the frame, […]


An architrave, also called an epistyle is the beam that rests on the capitals of the columns and is most associated with classical architecture.  The term can also be applied to all sides, including the vertical members, of a frame with mouldings around a door or window. The word architrave is also used to refer […]


Ashlar is finely dressed (cut, worked) masonry, either an individual stone that has been worked until squared or the masonry built of such stone. It is the finest stone masonry unit, generally cuboid in shape. Precisely cut, ashlar is capable of very thin joints between blocks, and the visible face of the stone may be […]

Glazing Bars

A glazing bar is a bar or rigid supporting strip between adjacent panes of glass. These bars are also popularly known is being called “Muntins”. Glazing bars are also called “muntin bars”or “sash bars”. Glazing bars can be found in doors, windows and furniture, typically in western styles of architecture. Muntins divide a single window sash or […]