You can design your windows and we’ll manufacture them to your specifications

Casement windows may in fact be the nation’s typical window design, but we’re confident we can create something unique and stylish for your property. All our casement windows are available in over 26 colourways – from the rich, luxurious Rosewood, to the light, playful, English Oak – we’ve got something for you. With our abundance of choice, we’re sure to find the right palate to match your home’s décor. Our casement windows are available with dual colour options, too, to ensure you find the right look for both the inside and outside of your home. Furthermore, our windows can be designed with as many or as few openers as you need – our job is to help realise your vision, no matter the specifications.


Choose your sightline with the help of our experts, and determine exactly how much frame you require. Symmetrical sightlines add value to any home and we’re happy to provide any assistance you may need.


We offer a multitude of different glass options – Clear, Lead, Anti-Sun, Impact & Safety Glass and more. We’ll also match any existing leaded glass units. All our units are available in astragal bar and Georgian bar designs.

Obscure Glass

If you’re searching for privacy, look no further than our Obscure Glass casement windows. We offer a wide range of ‘frosted’ or ‘patterned’ glass capable of giving you the privacy you want. To find out more, simply take a look at our glass brochure.

Our Casement Windows

  • Fensa Certified
  • Personal design appointment
  • 10 year guarantee
  • A+ Energy Rated Windows
  • Manufactured on site in our Factory
  • Double, Triple Glazing and acoustic glass options
  • Lead, Georgian & astragal bar options
  • Personal design appointment
  • Multiple glass options available

Take a look at our brochures

Casement windows endure as the UK’s most popular window primarily because their design permits natural ventilation – as they open outward at an angle, they’re great for cooling a room on a hot summer’s day, simply by redirecting airflow. When manufacturing our windows, we ensure the use of the highest quality materials, to foster a design defined by durability, security and style. All our casement windows come equipped with energy-efficient, A+ rated glass as standard.

In addition, all our casement windows are made right here in Essex, by leading experts, in our modern UK factory. Our in-house manufacturing facilities permit us to capitalize on current heat retention and SBD accredited security technology, providing you protection from the cold and from intruders. Furthermore, due to our in-house manufacturing policy, we’re able to process your order, manufacture your casement windows and fit them after just seven days, subject to survey. Talk about efficiency!

Our bespoke designs are custom built, to match your home and measurements. We offer a multitude of different options, allowing you to customize the colour, finish and material of your casement windows to match your décor. With options in uPVC, aluminium, timber and steel, we offer a broad choice of material to meet your design and security requirements.

heritage casement windows

Moreover, you can choose to have fixed panes with side opening lights and top opening fanlights – whatever suits your security and style needs. Having fanlights is ideal for added ventilation in the summer months, and for providing you extra security as they’re designed to stop intruders climbing through, if you happen to leave them open. We have an abundance of choice here too – whether you’re looking for decorative coloured glass or something a bit simpler, we’re sure to find a design you’ll treasure.

Whether you’re looking for a fresh, brand-new style, or something identical – a duplicate even – to your existing windows, we’re confident we can exceed your expectations. That’s why we offer a 10 Year Guarantee! Give us a call today on 01702 555553 and find your perfect replacement casement windows.

deceuninck colour express 1
deceuninck colour express 2
deceuninck colour express 3
deceuninck colour express 4

Why Choose Us?

Did you know, we’ve fitted over 100,000 casement windows alone since our inception! That’s an average of over 4000 casement window fittings a year! Talk about experience!

Our primary priority is to manufacture casement windows capable of satisfying your every design need. Our individual-first approach surpasses the approach of our competitors – we dedicate our time, energy and expertise to achieving a superior casement window style tailored to you, capable of exceeding your expectations. Our products do not rely on external suppliers, due to our UK-based, in-house manufacturing process. This process ensures we achieve a perfect fit every time whilst maintaining a speedy manufacturing timespan. Our double glazing products are made on site within only 5 days and following this our qualified experts will be ready for the installation. Our team of certified experts are ready to assist with enquiries today – we don’t over-price or over-promise, and we pride ourselves on our transparency. If you have any budgetary concerns, we have ‘buy now, pay later’ schemes available, with a 0% interest-free rate between 12 and 60 months. Call us for quotations on 01702 555553, or get in contact here.

Frequently Asked Questions

Are casement windows secure?

Casement windows are one of the most secure types of windows on the market. In addition to their secure design, we use advanced locking systems and toughened A+ rated glass. Furthermore, all of our casement windows are Secured by Design accredited – a police initiative to ensure securer designs across the nation.

Are casement windows energy efficient?

A window’s energy efficiency has little to do with its style and more to do with how it’s made and its double glazing feats. Our casement windows are remarkably energy efficient, capitalising on A+ rated glass, high-quality uPVC and state-of-the-art double glazing. We manufacture all of our casement windows inhouse, ensuring fantastic workmanship, subjected to rigorous quality control.

Are casement windows a good idea?

Yes, they are. The casement window is the oldest style of window in the UK – yet, it has endured in popularity due to their versatile-yet-simple design. They offer fantastic ventilation and clean designs.

Do casement windows break easily?

Some mechanical parts, such as the device which helps open and close the sash, may be subject to wear-and-tear over the years. However, this has a lot to do with faulty instalments and lacklustre manufacturing. Due to our inhouse manufacturing and FENSA qualified installers, we ensure we supply and install windows that are built to last. That’s why we offer a ten year guarantee!

My old casement windows need repairing, can I do this myself?

Of course! Many guides exist online – and if you’re a capable DIY enthusiast, there is no reason not to attempt a repair job. However, if you’re unsure of what you’re doing, or not repair-savvy, it might be best to avoid doing the job yourself. You may end up causing more damage. If you need any help, we’re casement window experts and are always happy to assist.