Bespoke Timber Sash Windows Essex & London

Secondary Glazing

Draught Proofing Heritage Windows
Suited to homes in conservation areas and Grade II listed buildings

Listed Property Thermal Solutions

If you have a listed property and wish to retain the original sashes and glass in your windows, then secondary glazing could be a cost-effective option for you to consider.

Secondary glazing is a fully independent window system installed to the existing windows, on the inside of the property. It’s usually constructed with a lightweight and thin aluminium frame, so it won’t block the sunlight or obstruct your view.

Slender, discreet and efficient, it’s perfectly suited to homes in conservation areas and Grade II listed buildings.

We offer secondary glazing to suit every application, including openable, removable and fixed units.

Preservation of your original windows and glass

Enhancement in window efficiency

Secondary glazing offers a multitude of advantages, including the preservation of your original windows and glass, a significant enhancement in window efficiency, substantial reduction in heating costs, and a valuable contribution to the elimination of unwanted outside noise. Furthermore, our secondary glazing units can be tailored to meet your specific needs, offering a range of glazing options for a personalised solution.

Period Window Restoration London

What Our Clients Say


Smooth Movement Sashes work for us as and when required. They always do a very good job. I’ve never experienced any problems with them and their work is very good. They always arrive on time and stick to the promised deadlines. Customers are always satisfied with windows they’ve done.
Boyle Contracts Ltd - London
SMS replaced all our windows in our 1896 Victorian house. A few years ago we had all windows replaced by someone else and they were just awful. We hired SMS to replace them and it was the best job ever. They replaced 16 sash windows and one very large kitchen window, all with wooden frames. The work done was to the highest imaginable standard. I am really very, very impressed with SMS’s work. The work they did was brilliant!
Gina Black - Essex
I would recommend Smooth Movement Sashes to anybody looking for secondary glazing. The process has been fantastic and has definitely made a huge difference to our house. The difference in the sound level is amazing and the house is so much quieter inside.
Steve Allen - Colchester
We can’t recommend this secondary glazing enough. Our lounge is warmer and the condensation is gone. I can actually see my garden now.
Barry Young - Billericay
SM Sashes recently completely renovated my very old sash windows. The windows rattled and were draughty. I’d made small wooden pegs and had them wedged to stop the rattling but that didn’t stop the draught!! They’ve now been completely refurbished and draught proofed! Will did a brilliant job, including renewing the sills which were old & rotten. In my opinion the cost of this work was very competitive and I’d definitely recommend to others - in fact I’ve already given their number to friends. Overall a very impressive job.
Susan Ryland - Kent
SM Sashes mended a sash cord and replaced a broken pane of glass of a victorian sash window to a good standard. They were quick, efficient, friendly and trustworthy. They mainly cleaned up after themselves and any bits left (old paint/wood chips which had to be scraped off the window in order to prime it) were easily hoovered. We would use them again or recommend them.
Andrew & Cathrine - Hertfordshire
SM worked for us last year renovating our sash windows. They were easy to deal with, trustworthy and friendly. The work over all was good. I would use them again.
Chris Klimpke - Kent
Smooth Movement Sashes recently carried out some draught proofing work on our cottage. The team were very professional. All the work was done efficiently and quickly saving us time and money.
Martin Hampton - London

Trust is paramount

Our 5 Year Guarantee

Trust is paramount to us. This is why all our works come with a 5 Year Guarantee from the date of completion, giving you peace of mind with every service rendered.

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0203 701 8837

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