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Can sash windows be double or triple glazed?

The short answer is yes, sash windows can be double or even triple glazed. But if we’re talking about double or triple glazing the original wooden sash windows in an older property, there could be problems. 

You may be faced with windows that are well past their best, not just structurally but also in terms of weather proofing and thermal efficiency.

Wooden frames are susceptible to rotting, swelling and pests. Due to shrinking and expansion of wood with temperature changes, the sashes may get distorted and fail to operate smoothly.

The older your existing wooden sash windows, the less likely they’ll be to have retained their ease of movement, as you’ll probably know if you still have sashes that were installed in Victorian, Edwardian or Georgian times.

Original sash windows also have a counterweight on a cord inside the frame. Should this cord have snapped, the frame must be disassembled to repair it.

Depending on their age and state of disrepair, it may be impractical, not to mention expensive, to try and upgrade aged wooden sashes.

In which case by far the best solution would be to install brand new windows that have can provide you with all the benefits of fully doubled or triple glazed units, together with modern and durable weather-resistant materials.

Why choose double or triple glazing?

Double or triple glazing can do wonders to improve the thermal efficiency of your property simply because the spaces between the panes of glass create either one or two pockets which are filled with harmless inert gas such as argon.

Having extra glass panes with spaces between them helps stop heat loss from inside and cold air from outside. It also helps to reduce noise intrusion from outside.

The best of both worlds.

With the advent of materials such as uPVC, manufacturers are able to design windows that combine the practical functionality of technologically advanced materials, with the traditional aesthetics of a classical 19th century wooden sash window. 

The Residence Collection.

All of these advantages are beautifully realised in the award-winning range of windows and doors from The Residence Collection, which allows you to select to benefit from either double or triple glazed units with exceptional energy efficiency and acoustic performance, whilst enjoying the aesthetic appearance of a sash style window, but one that opens like a normal window rather than slide up and down.

All the beauty of sash windows, but far more practical – and a choice between double or triple glazing without any issues.

For more inspiration follow the link below to view our Pinterest board!

Start your Residence Journey today. Download one of our brochures and find the windows to bring your period or conservation property back to life.



At Residence Collection, we have a range of colours available and can offer everything from timeless classics like Grained White to modern favourites such as Eclectic Grey. Don’t forget, we also offer a dual finish that allows you to find windows and doors that look as good from the inside as they do outside.