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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. One way to identify a sash window is that there is a frame holding together multiple glass panes. Quite often narrow muntins separate the panes.
There are a few different types of sash windows. 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 traditional sash windows found most commonly in the US and UK are made of two sashes that are positioned in a frame with one over the other. Each of these separate sashes can slide up or down within the window frame. One major benefit of this window is that the sashes can be tilted or removed for easy cleaning. There are many different configurations, models and shapes to choose from within this class of sash window.
The sash window has a long history, originating in England in the mid-17th century. The famous Ham House located on the River Thames just outside of London is an early architectural example of a building featuring sash windows. Robert Hooke is credited with creating the sash window, although there isn’t any conclusive evidence that proves this.
Victorian and Georgian style homes usually feature sash windows. These houses usually feature a classic six-panel sash window with two sashes, each featuring three panels above and below. This is often referred to as a six-over-six panel 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.
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 design of the sash window, since it can be opened at the bottom and at the top simultaneously. 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.
When you decide to give sash windows a try, be careful not to go with the first window installer 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.