What is a Sash Window?Windows come in a variety of styles, but one of the more popular styles chosen by consumers are sash windows. 1 Sash windows promote a very elegant and detailed design to add a touch of class to any property. We’ve put together a handy guide of information to help you understand what a sash window is and whether it’s the right choice for your home.
Where did sash windows originate from?
It is unknown for definite who invented the sash window, but some theories credit English designers, with others giving credit to Dutch designers. Sash windows were first introduced into England in the late 17th century and grew in popularity to become the window of choice due to their elegant style. This popularity for several hundred years contributes to most Georgian and Victorian houses being equipped with Sash windows. 2 UPVC sash windows were introduced in Germany in the 1960’s which has increased their popularity again due to the low cost and maintenance of uPVC frames. 3
Tradition sash windows consist of several small panes of glass joined by glazing bars to produce a solid panel. This design was created from necessity in the 19th century when homeowners wanted larger windows to enjoy their view from. In this century the technology to produce large panes of glass did not exist, so smaller panes of glass secured together was the best option available.
What is a sash window?
A sash window is a window that consists of one or more moveable panels, or “sashes”. These panels form a frame that hold panes of glass, often separated by glazing bars producing that familiar classic period window look. The frames typically move vertically up and down to open and close the window allowing a minimum or maximum amount of ventilation into the property.
How does a sash window work?
Sash windows typically consist of two glass panels which slide over each other to open and close the window. They usually slide vertically, but can be designed to open horizontally.
Sash windows are manufactured with a counterbalance, usually a weight concealed within the frame, to allow easy opening and closing. A system of hidden pulleys allow the windows to slide over each other with little or no effort.
Single and double-hung sash windows
There are two main types of sash windows, single hung and double-hung. From a distance, the two types of windows look identical, the differences lie in the way they work.
A single hung sash consists of one fixed panel with another panel that is movable. Single hung windows are cheaper to manufacture due to there being fewer moving parts to engineer. This then results in single-hung windows being easier to instal, resulting in a cheaper product for the consumer. Single-hung windows are also said to be more energy efficient with one panel being fixed in place and less room for air leakage.
Double-hung sash windows work in the same way as a single-hung sash does, the only difference being that both panels are moveable rather than just one. This creates a very flexible design that allows both the top and bottom to be open at the same time. The two moveable panes also make the windows easier to clean as the top pane can be dropped down with ease.3