Complete Colour Customisation

Pick from our range of colours

Our French casement windows are available in a broad array of different colour and foils. By being made to order, we can offer colours in bespoke RAL finishes, as well as premium woodgrains for those looking for a touch of class. We have something for every style of home in Buckinghamshire.

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.

French Casement Windows

Here at Castle Glass, we install the finest French casement windows Buckinghamshire has to offer. Much like the identical door style, French casement windows open from the centre, with a floating mullion rather than a traditional central column. Adding a touch of classy, continental flair, they are fantastic renovation option for garden-facing rooms such as bedrooms and kitchens.

The profiles for these windows are supplied to us by Liniar, who integrate a range of high performance hardware into the frame. This is partnered with the bespoke glazing we craft in house, which is equally as modern and thermally efficient. This ensures that every French casement window we install not only delivers a high performance but is fully tailored to you.

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Features & Benefits

Complete Glass Customisation

Our French casement windows come with an array of decorative and frosted glazing options. We have styles for every home, so take a look at our available options in more detail now. If you find a style you like, price up a double glazed window with that glazing using our quoting engine today or by contacting us.

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


These windows are completely free of all lead and are manufactured in a process that is also fully lead-free as well. You need not have any concerns.

Our French casement windows are incredibly secure, thanks to a robust materials and modern locking systems as standard.

Every Liniar product is manufactured here in the UK, to ensure they are of a consistently high quality, every single time.

Sightlines are the part of the window visible to the naked eye. A slimmer sightline comes from thinning down the profile of the window!

Our French casement windows are made bespoke to order. With this, you can customise the glazing thickness, colour finish, accessories and hardware.

Get in Touch

The Castle Glass team are more than happy to provide quotes for our French casement windows over the phone. Simply leave your details on our online form, and we’ll get back to you. If you have any questions about services, you can call us today on 01494 873399.

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