What is a window sash? The window sash explained in simple terms!
22. November 2023A window sash (Fensterflügel) is the part of the window that can be opened. It consists of a glass pane, the sash frame with a window handle, and the hardware fittings. The other part of the window, which is immobile and mounted into the masonry, is the window frame.
A window sash can be designed to open to the left or to the right, depending on the window hinge position. In a double-sash window, there are two window sashes that open in different directions. In addition, there are also triple-sash windows, where usually two sashes open in one direction and one sash opens in the other direction. As a rule, a window sash can also be tilted, meaning it opens a crack at the top, for example to ventilate the room. There are also various other ways to open a window sash.

How a Window Sash Can Be Opened
With a standard window sash, the tilt-and-turn sash, the window handle is operated and then the window is opened to the left or right. Alternatively, the window is only tilted. Both variants are possible.
However, there are also special forms of opening a window sash. With roof windows, for example, the window sash is usually pushed upwards. In addition, there are also sliding windows that do not have a classic handle, but are instead pushed into another window sash.
Furthermore, there are window sashes that can only be tilted – the tilt sashes – as well as those that can only be turned open – the turn sashes. In addition, there are fixed sashes that cannot be opened at all, and various special forms such as top-hung sashes, pivoting sashes, and reversible sashes.
The Material of Window Sash Frames
The window sash frame is generally made of wood, plastic, or aluminum. These building materials can also be combined with one another. Each of them has its own advantage: plastic is comparatively inexpensive and easy to care for, aluminum is particularly weather-resistant and correspondingly durable, and wood convinces with its natural charm and the visual warmth it radiates.
Double Glazing for Energy-Efficient Insulation
High-quality, well-insulating glazing is very important when it comes to keeping the warmth inside the house and thus reducing the building’s energy consumption. In this context, double glazing, which consists of two glass panes and a cavity lying between them, is very sensible. In modern houses, the window sashes almost always consist of double glazing, because so much energy was lost with single glazing that it has hardly been installed since the 1970s. In the meantime – for even better thermal insulation – certain gases are frequently channeled into the cavity instead of air. Since 2009, triple glazing has even been replacing double glazing in new buildings – and here, of course, the insulating properties are even more pronounced.
Privacy Protection on the Window Sash
It is part of the standard in many houses that the window sash is equipped with privacy protection. Usually, these are roller shutters that close off the window sash from the outside; in old houses, they are sometimes still wooden window shutters. If, however, no roller shutters or window shutters are present, it is not difficult to provide a remedy. Blinds, a pleated blind, or even curtains are quickly hung up and likewise represent effective privacy protection.
Burglary Protection for Your Window Sash: Schlüsseldienst München – Mario Pichelmaier Will Gladly Advise You
A window sash – especially on the ground floor or in the basement – can represent a weak point in the house where burglars could have an particularly easy time. But that can easily be remedied – provided you have the right know-how or the right partner at hand. We, Locksmith Munich – Mario Pichelmaier, specialize in burglary protection among other things, and will gladly help you make your window sashes burglary-proof. For example, by using lockable window handles, or by installing alarm systems or motion detectors right on the window.
Are you a little worried about whether your home is truly secure or whether there might be one place or another that could be easy pickings for a burglar? Then give us a call and we will come by to carry out a vulnerability analysis. Based on this analysis, we will then recommend which technical and mechanical devices are particularly well-suited for your window sashes, but also for doors and other potential weak points. Of course, we are also happy to take over the installation.