Sash windows are a truly classic feature of British architecture. Throughout the Georgian, Victorian and Edwardian periods, sash windows were – quite simply – the window of choice. And although their popularity waned in the 20th century, a heightened interest in conservation issues combined with modern materials and techniques has lead to a clear revival in recent years.

Of course, original sash windows were always timber. However, like all windows of their time, original timber sashes suffered from a range of common problems, particularly as the windows aged, and especially if they weren’t regularly maintained. Issues such as rot, timber warp (making the windows difficult to open) and draughtiness were all commonplace. As time passed many of the techniques used in building the original windows became outdated. The best example of this is the glazing – up until the mid-20th century there was no such thing as double glazing, so windows simply had a single sheet of glass to protect and insulate the inside against the British weather. Finally, the window users themselves often haven’t helped the situation: how many times have you seen timber sash windows covered in dozens of coats of white gloss paint applied over the years – often so much that the windows are completely painted shut?

The result of all this is a plethora of beautiful but frankly impractical original timber sash windows that are in desperate need of modernisation.

Replacing sash windows – what used to happen

Throughout the 20th century, all too often modernising windows took the form of ripping out original windows and replacing them with cheap but far less attractive aluminium or early uPVC casements that – quite simply – don’t look right. In almost every town in Britain you can find streets of Victorian bay-fronted terraces, all of which would have had timber sash windows originally, and almost all of which have now been ripped out and replaced with ‘mock sash’ casements. The result is usually a mix of different styles, shades and sightlines that break up the harmony of a classic Victorian terrace.

The result is a poor substitute for the original.

Of course, throughout this period timber sash windows were still available, and modern timber sashes include a number of benefits and enhancements over their original counterparts. However, timber windows have always been expensive (even when made from softwood rather than hardwood) and modern timber windows need just as much maintenance as originals, which – throughout their life – makes them more expensive still. Similarly, sash window refurbishment has always been an option, where specialist joiners completely overhaul the windows, stripping back to the original wood, replacing rotten sections with new timber, and replacing broken parts such as sash cords and weights. The results can be incredible, but good joiners cost almost as much as new timber windows, and it doesn’t get over the problem of the terrible energy efficiency offered by single glazing.

How a Victorian terrace should look, with true sash windows in place.

But now things are changing…

In the mid 1980s a new option came onto the market. Originally introduced by Rehau – one of Europe’s largest window system companies – uPVC sash windows were first launched in 1985. Designed in partnership with the Peabody Trust – one of London’s largest housing trusts – the original uPVC sash window was designed to match the appearance of a typical London Victorian timber sash window as closely as possible, while building in the many advantages of modern techniques and materials.

Although uPVC sash windows started off very slowly, in the 25 years since they were launched they have undergone many updates and enhancements, and are now fast becoming a mainstream product in the double glazing industry.

In essence, modern uPVC sash windows look just as good as timber originals, but are enhanced with a wide range of modern benefits, including:

• authenticity – designed to look exactly like timber sash windows, including traditional features such as sash horns and plant-on astragal bar designs, and available in a range of colours and finishes
• safety – modern sash windows meet stringent safety requirements and can include features such as opening restrictors and fire escape opening
• convenience – most uPVC sash windows allow each sash to be tilted inwards, so you can clean the outside of the window from inside
• thermal efficiency – keep the cold out and the warm in with multi-chambered uPVC sections and modern ultra-efficient double glazing, meaning that uPVC sash windows are now regularly A-rated for thermal efficiency
• enhanced security – modern locks, steel reinforcement and anti-jemmy bars are all common features
• zero maintenance – no more painting required, just wipe down with a damp cloth to clean

 The choice is clear…

While uPVC sash windows do cost more than standard uPVC casement windows, they are considerably more cost-effective than modern timber sash windows. And if you take the cost of maintenance into account, they make even more sense. So if you’re considering replacing or upgrading your existing sash windows for something that”s more energy efficient, safe and secure, the choice is simple.

If you’re interested in stunning uPVC sash windows for your home, why not contact Roseview Windows - the UK’s leading sash window manufacturer.