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Sliding Sash Windows

uPVC sliding sash windows are based on the traditional design of vertical windows. This particular style of double glazing was initially constructed from timber. And to operate the window, a series of wheels, rope and handles.

These modern, updated versions of sliding sash windows retain the aesthetic beauty of the original design without the drawbacks. If not treated properly, traditional timber windows have a reputation for falling victim to damaging and corrosive weather conditions.

Our modern uPVC windows are constructed from specially formulated and, environmentally friendly plastics. As a result, our uPVC sliding sash windows require little to no maintenance in order to retain their appearance and functionality regardless of the weather conditions.

Once installed, our uPVC sliding sash windows will never need to be removed for repainting. We recommend you clean the inevitable build up of any dirt and grit, but that’s all.

If you are looking for a modern double glazing solution that incorporates style, energy efficiency and security then our vertical sliding windows are for you. The team at Dunmow Double Glazing know just how important style and appearance is when it comes to home improvements.

Our uPVC sliding sash windows are available in an extensive range of attractive colours, ensuring you get the perfect window for your home in Great Dunmow.  


uPVC Sliding Sash Windows and Security

The intelligent design of our uPVC sliding sash windows increases the security of your property, whilst allowing complete control over your properties ventilation.  An intelligent mix of reinforced hinges and locks allows you to leave the window open to any degree, giving you complete control over your ventilation and security simultaneously.

On a hot summers day, leave the window ajar and securely locked into position. Resulting in a fully ventilated home, comfortable and secure living space. We install the highest quality locking systems into our sliding sash windows, ensuring that your double glazing brings unbridled levels of security.  

If you have questions or concerns regarding the security of our uPVC sliding sash windows, please speak to one of our team members. Our team of specialist double glazing experts have years of experience in the trade and can settle any concerns that you have.

Energy Saving Design, Lower Heating Bills

All of our uPVC casement windows are constructed using thermally focused materials and size optimised frames. This method of constructing windows tackles energy efficiency in two ways. To begin with, the internal structure of the frames.

A web of size optimised chambers that help trap pockets of air, and prevent cold air from passing through and your expensive heating from leaving your property.

Around the perimeter of the window, a high density rubber sealant around the perimeter. Making the window completely airtight, and increased thermal performance.  The glass used in our windows is designed to deliver maximum energy efficiency.

In conclusion, our uPVC casement windows are an exceptionally high performing and popular double glazing choice. These purpose built windows deliver high levels of energy efficiency, helping you minimise your carbon footprint and reduce the expense of heating your home.

Areas We Cover

We offer our full supply and fit service for bespoke double glazing solutions in Great Dunmow, Braintree, Chelmsford, Saffron Walden, Bishops Stortford, Stanstead, Thaxted, Harlow, Whitam, Billericay, Brentwood, Basildon and the surrounding Essex towns.

We will offer our installation services outside of these areas, depending on the requirements of the work and scale of the project. Please get in touch with one of our team members today to see how we can help you.

Available Colours:




White Ash




Golden Oak




Irish Oak


Anthracite Grey


Slate Grey


Black Ash




Quartz Platinum




Crown Platin


Agate Grey


Moondust Grey

uPVC Casement Windows Prices Great Dunmow

We are committed to providing an exceptional level of customer service, and competitive prices to all of our customers. We have invested in interactive software, which allows you to design your perfect window for your home and get a free quote in just two minutes.

Get your free uPVC casement window price today in just two minutes by visiting our quote page. If you would prefer to speak with one of our polite and professional team members about your windows, please get in touch via our contact form or call us on 01371 821917 or 07809576227.

Double Glazing Prices Essex