Elegant Sliding Sash Windows

Sash windows are iconic features of British homes and have been used in British architecture since the 17th century. Sliding sash windows offer elegant proportions and sliding panels for ventilation. Sliding sash windows are constructed using two sashes that slide up and down. Traditionally sliding sash windows have no outward swing, but modern designs offer a tilt function. Pop into our showroom to see our range of windows in person.

The number of bars are optional and depends on property style and homeowner preference. Niddal also offers a fantastic range of key improvements like Georgian bars and sash horns, security features, child safety catches, energy efficient double glazing and easy action balance mechanisms. Sliding sash windows are perfect for historic properties or for enhancing modern grace and elegance are now combined with performance and all the benefits of 21st century materials and technology.

Use our online quoting engine, and you can get an estimate on our stunning range of windows. Customise your sliding sash window profiles so they perfectly suit your property, from modern homes to traditional properties and apartments. Alternatively, call us to arrange an at home consultation. We are also happy to provide quotes for our sliding sash windows over the phone. Leave your contact details and some specifications about your windows on our online form, and we’ll get back to you as soon we can.

Features & Benefits


Long Lasting

Sliding sash windows are durable, secure and come with a fantastic lifespan. They will never distort, warp or bow within their framework.



Our uPVC sliding sash windows are available with enhanced high security locks for homeowners peace of mind.


Energy Efficient

Our range of multi chambered profiles as standard, achieve the highest possible BFRC Window Energy Ratings in the industry.


Easy to Clean

Sliding sash windows combine a tilt facility and lift facility for excellent functionality and easy cleaning from inside the home.

Start a Free Online Quote now!

Use our online quoting engine to get a bespoke estimate for your new sliding sash windows.

How Can I Customise My Sliding Sash Window Profiles?

Niddal offers a wide choice of coloured and foiled finishes, as well as being available in any RAL colour. They can also be specified in dual colour, with a different finish inside and outside.  We also provide heritage influenced window hardware in a choice of classic finishes, so you can perfectly customise it to your home. Our windows offer a range of customisable features, working in full compliance with all ‘off the shelf’ hardware. No matter your tastes and budget, we’ll have something for you. Get in touch today and one of our team can help find the perfect sash window for your property.

How Can Sliding Sash Windows Enhance My Thermal Efficiency?

Although they replicate the traditional charm of heritage sash windows, they offer impressive standards of thermal efficiency. Their high performance profile works to increase the heat retention of your home, achieving an ‘A’ energy rating with 24mm sealed units. This ensures your home remains warm and comfortable throughout the year. Increased heat retention, won’t just help your home stay warmer for longer, it will see a reduction in your heating costs. To prevent draughts, we install pile seals to both the sash and outer frames. Draughts can be extremely detrimental to home comfort and are well associated with outdated or inferior window designs.

Can Sliding Sash Windows Be Installed In Conservation Areas?

Our sash windows can be designed to adhere to even the most stringent local building regulations. Before starting the installation process, we always recommend speaking to the local building authorities for confirmation. Because they have been designed to match the traditional look of a timber box sash window, they will look at home in any traditional or heritage problem, or for new builds that imitate older architecture.

What Are These Sliding Sash Windows Made From?

Our sash windows are made from uPVC. This makes the profiles cost effective yet high performing. uPVC can give the effect of a traditional profile with all the modern benefits of durability and longevity, as well as being cost effective. uPVC windows are also extremely thermally efficient and have very low thermal conductivity. This will stop heat escaping so easily, keeping your  home comfortable all year round.

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