Understanding the different parts of a window can aid you in choosing the ideal set of windows for you, as well as helping you to care for your windows and ensure that they can stay in tip top condition for as long as possible. You may be under the false impression that a window consists of nothing more than a frame and some glass, but this couldn’t be further from the truth. Luckily it needn’t be difficult to get to grips with the different parts that contribute to creating a window, as it’s simple to understand the features that make up the perfect set!

Most of the common windows that you are able to source consist of two main components – the outer frame and the sash. The outer frame is essentially the surface area, or the external casing of your window, and inside of the frame is the aforementioned sash as well as the glass too. The inside area of the frame is known as the wash, and it’s the feature of your window that holds the glass in place. A great example could be a single-hung window, as sash is the piece that you use to slide the window open. 


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When it comes to the windows frame, there are 3 main features that come together to create a strong and sturdy perimeter that can support the weight of the glass. First of all you have the sill, which is the horizontal strip that is placed along the bottom line of your window frame. Second comes the jamb, which offers vertical support for the window frame, followed by the final feature, the head, which lines the top of frame to complete the square or rectangle. 

The sash is made up of several different components, each of which are equal in their importance. The stiles make up the vertical sections of your windows sash, whilst the horizontal sections are commonly known as rails. 

The sash outlines the most important feature of your windows – the glass. The glass inside a window is often referred to as the windowpane, which references the different glass sections that come together to complete the piece.

A very common decorative concept that can take your windows to a whole new level are features called grilles. These grilles are essentially an option that allows you to add some lines that can divide your glass, both inside the windows glass itself (known as GBG’s or grilles between glass) or actually on top of the glass’ exterior surface (referred to as SDL’s or simulated divided lites). You can get many other decorative features to upgrade the individuality of your windows, so you needn’t stick with a simplistic approach if this isn’t for you. 

Windows can come in many shapes, sizes and styles, but they all consist of the same main features that have been detailed above. Now that you have been able to familiarise yourself with the different components that contribute to the creation of a window, you can explore our amazing ranges that will no doubt fit your every need. 

Want to know more?

If you want help choosing the right product or solution, our technical sales staff are here to help.

Why not call us today on 01702 826 267 or click below to submit an enquiry.

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