uPVC Sash Window Features and Prices
With their particular uniqueness, sash windows can be seen in many homes around the UK, particularly in those built in the Victorian, Georgian and Edwardian periods.
Such is the lasting appeal of the design that it has continued to be developed over the years, so that you can now find some superb examples constructed using uPVC.
Whilst some purists will say that the only true sash window is one made from timber, there are many advantages of using uPVC sash windows and we will look at those features in this article.
The aim of the article is to be the ultimate guide to uPVC Sash windows and will cover:
- Back to basics – what is a sash window & how does it work?
- What are the main design options for uPVC sash windows?
- UPVC sash window features – basics & added “extra’s” (colours, finishes, glazing options).
- What are the advantages & disadvantages?
- How much do uPVC sash windows cost?
What is a sash window & how does it work?
For those of you who are not quite sure what a sash window is, how it works or how it is different from other types of window, this should explain it for you.
The first thing to know about sash windows is that they open or close by sliding vertically up and down. Unlike other windows which open from the side, bottom or top, classic sash windows do not use hinges. The opening sections simply slide / move within tracks on the side frame (more about specialised opening functions later). The moving sections are commonly referred to as “sashes”.
Because the weight of the sash is not taken by a set of hinges, is has to be counterbalanced another way. This is done by attaching a rope (sash cord) and counter weight to the moving section.
The sash cord runs up the side of the window frame track, over a pulley wheel and then runs back down inside the window frame and is finally connected to a counterweight. So this miniature rope & pulley system is what takes all the effort out of sliding the window open or closed.
A uPVC sash window is simply a version constructed from a rigid polymer called Unplasticised Poly Vinyl Chloride. UPVC is a very tough, long lasting, light and strong material that is also used in many other types of new or replacement windows or doors.
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What are the main design options for uPVC sash windows?
Standard uPVC Sash Windows
The typical installation for a residential property will have 2 moving sections. One at the top and one at the bottom, each section taking up half of the height of the window. The bottom section is usually on the inside track.
The sashes can be all glass or be divided by Mullions, Muntins or Astragal bars into smaller sections, some quite decorative, some simple.
As briefly mentioned above, a lot of period homes (Georgian, Edwardian or Victorian era properties) still have sash or box sash windows (they are the same thing really) and you will see that there are a few main glazing styles used.
Quite often you may see top & bottom sashes made up of 6 smaller panes – this would be a 6 over 6. This setup can also be seen in 2 over 2, 3 over 3. See the images below.