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A window is referred to as a sash window if it has one or more movable panels, which are called sashes. If the window is made up of several individual lights or pieces of glass held together by a frame, then it is a sash window. Quite often narrow muntins separate the panes.

Sash windows come in many different varieties. Sometimes the panels of glass slide up and down or side-to-side. Other sash windows have panels that open outward. The sliding sash windows sometimes are referred to as sliding sash, case, sash or Yorkshire light windows.

The typical American style sash window has a frame with a sash on top and one below. Each of these separate sashes can slide up or down within the window frame. One of the benefits of this window is the ability to remove or tilt the sashes in order to clean them. There are many different configurations, models and shapes to choose from within this class of sash window.

The origin of the sash window dates back to the 1670s when they were first installed in England. “Ham House” is a famous and elaborate historical home that has sash windows. Robert Hooke is credited with creating the sash window, although there isn’t any conclusive evidence that proves this.

Victorian and Georgian houses often feature sash windows. The classic type of sash windows has three panes placed horizontally and two placed vertically, resulting in a six-over-six paneled window. The standard size of sash windows is four feet wide; however, wooden sash can fit almost any size and there is no fixed rule.

In order for sash windows to function, there is panel that is balanced through using a counter-weight made of heavy steel or another material hidden within the window frame.


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Usually sash windows are made out of single glazed glass and soft wood, although sometimes double glazed glass is used.

A sash window is more likely to need some routine maintenance than a fixed window due to the fact that the panels slide each time the window is opened and closed. They require a lot of maintenance as well; however, the extra work involved is worth it since sash windows are very attractive.

In addition to the aesthetic appeal of sash windows, they are also more efficient in cooling the inside of a building during warm weather than other kinds of windows. This is due to the fact that sash windows open at both the bottom and top. The room’s warm air is allowed to escape through the top opening, while cool air coming from outdoors is allowed in through the bottom opening.

A new kind of sash window was released recently into the marketplace. They are called uPVC sash windows, and they are attractive like regular sash windows are but are much more energy efficient and don’t require as much as maintenance and painting on a regular basis.

As is the case with anything, it is important to not go ahead and hire the first window company you find. Make sure to get work samples and quotes from thee different companies at least before you make your final decision on which company you want to have install your new windows.

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