Complete Colour Customisation

Pick from our range of colours

Our sliding sash windows are available in a range of colours, giving the perfect opportunity to unify your windows with the rest of your home. Choose from a classic shade, or opt for a premium woodgrain, if you’re looking to authentically replicate the look of old timber sliders.

Choose a colour!
Agate Grey
Anthracite Grey
Chartwell Green
Golden Oak
Irish Oak
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Energy Efficiency & Environmentally Friendly

100% Lead-Free

By working with Liniar products, our entire window and door range is fully lead free. There is no lead used in the profile itself or throughout the actually manufacturing process. Such a unique, eco-friendly process is unheard of with other manufacturers.

Lower Carbon Footprint

Both the profile and the glazing we use offers fantastic thermal insulation as standard. With improved heat retention, you may not need to have your heating on as high in winter. Doing so can see you improve your carbon footprint over time.

100% Recyclable

The uPVC profile used for our Liniar windows and doors is made from fully recyclable materials. Despite this, they still deliver superb thermal and security performances across the board, standing toe to toe with new profiles from other manufacturers.

Energy Efficient Profile

All our Liniar uPVC windows and doors are fantastically energy efficient. The multi chambered uPVC profile retains the maximum amount of heat, adhering to the latest regulations. Your home will sit at the optimal temperature during winter.

Sliding Sash Windows

If you live in an older property here in Buckinghamshire, new sliding sash windows are a fantastic renovation option. They authentically replicate the vertical sliders of old, offering you a modern uPVC home improvement disguised as a traditional timber product. You can fit them to an older property, improving its overall performance without compromising on the period charm.

Sliding sash windows operate on a vertical sliding mechanism. This allows the bottom half of the sash to slide vertically, sitting parallel with the top half when opened. These types of window are almost exclusively fitted to older properties here in the Buckinghamshire region. However, with Victorian houses more popular than ever, the demand for new vertical sliders has reached its peak.

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Features & Benefits

Complete Glass Customisation

Our sliding sash windows come with a range of glazing options, allowing you further control over the windows you have fitted. All our glass is made bespoke and in-house, allowing you to choose a decorative style that perfectly suits your home.

Charcoal Sticks
Half Timber Ali Image

Available in Aluminium & Timber!

Castle Glass work with industry leading supply chains to install high quality aluminium and timber products across the Buckinghamshire area. Explore our individual timber and aluminium pages today for more details about these two stunning products.

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Maximum Security

Hidden Attack Lock

Ultion locking systems come with unique technology that will detect if an intruder is attempting to gain unwanted access through the window or door. When activated, a hidden firing pin secures the central cam, fully preventing any forced entry into your home.

£1,000 Security Guarantee

The Ultion locks fitted to your new windows or doors are supported by a financial guarantee. If an unwanted intruder does manage to break-in, you’re entitled to compensation of up to £1000. The chances of this ever happening is extremely thin, however.

Drill Protection System

20 hardened steel pins are fitted into an Ultion lock as standard. They are precisely and individually positioned to specifically prevent an unwanted intruder from using an electric drill to get into your property. No other lock on the market can offer the same.

Secured by Design

Our windows and doors can reach Secured by Design requirements when they are fitted with Ultion locks. A scheme supported by the UK police, it lays out the minimum standards for competent home security. Our products comfortably exceed these.

Hardware Options

Monkey Tail
Tear Drop

View the brochure


Unlike the vertical sliders of old, our sliding sash windows are made with a uPVC profile, for the optimal performance.

You can contact us to price up a set of sliding sash windows today. They may just be more affordable than you first expected.

These windows come with a range of customisation options, including the colour finish, handles, accessories and hardware.

No, they do not. Instead, they only need an occasional clean with a cloth to prevent the build-up of excess dust.

Our vertical sliding windows better suit more traditional properties. We have alternatives that better suit modern homes.

Get in Touch

We are more than happy to provide estimated prices for any of our products over the phone. Leave your details on our online form, and we’ll contact you at a time that suits your schedule. If you have any questions about our products or services, call us today on 01494 873399.

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