Casement Windows

Manufactured & fitted by your local suppliers
in Littlehampton, West Sussex

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Casement Windows

  • Casement windows have a sleek, effortless look that suits both contemporary and period homes. Casement windows are a type of window that attach to a frame, using one or more hinges, and the windows are either hung by the top or side. Your windows can then either open inwards or outwards, and there are a number of different style combinations that can be created.

    A side hung casement window is a simple, classic style, and they are popular due to their easy operation. You can leave them open a crack for some ventilation, and locks can be added for extra security. Top hung casement windows open from the bottom of the window frame, so if it’s raining, they can still be left slightly open at an angle.

    Kayvex can manufacture all sorts of casement windows to your exact specification at our modern factory, with various frames and colour finishes to give you the look you want. We can create casement windows in modern and period styles, suited to your property, and our expert engineers install them for the perfect finish.

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    Lifetime Guarantee
    10-year manufacturer’s guarantee.

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    Tailor Made
    Classic windows tailor made to your exact specifications.

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    100% Satisfaction
    Award-winning customer service and after-care support.

  • All our UPVc casement windows are crafted using the latest multi-chambered technology to achieve the very best thermal and weather performance. This works to trap in pockets of warm air and maintain the temperature in your home. The gasket delivers a continuous seal to keep windows draught free.

    State-of-the art multi-locking security features, wide choice of styles and configurations and colours make for a perfect fit.

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    Flexible monthly payments

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    Interest free credit

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    Buy now / pay later

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    No finance required

Casement windows are a popular style

Casement windows are one of our most popular styles, and over the years we’ve perfected them with better insulation for lower energy bills, exterior noise reduction and better security. This ensures that when you fit our windows, your home feels safe, secure and comfortable. Casement windows can also be fitted with extra locks for additional security. 

Our casement windows have been certified , a police initiative that encourages quality, innovative design to help reduce crime.

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Common questions

What is a casement window?

Casement windows swing open, with hinges either on the top or side. You can fit single, double, or even multiple windows in one frame, with hinges that swing open outwards, ensuring maximum natural light and allowing you to let in fresh air. 

Side hinge windows are probably the most common style. However, in the UK, you’ll often see top hung casement windows, also known as awning casement windows, with a hinge on top. This allows you to keep the window open at a slight angle, even in the rain. Bottom hung – or hopper windows – are less common but can be useful for spaces such as basements.

Do casement windows offer energy efficiency?

Casement windows have an airtight seal where the window sash meets the frame, which stops cold air getting in and warm air escaping during the colder months. This means they provide insulative properties for your home. You don’t waste money heating a room with a draught; therefore, your energy bills can be cheaper.

Double or triple glazing can make your windows even more energy-efficient, as well as having advantages such as noise reduction, which is ideal for those who live in busy, noisy areas.

Are casement windows the same as picture windows?

Casement windows attach to the frame with a hinge, which can either be installed to swing inwards or outwards, allowing you to get fresh air. A picture window doesn’t open at all, which means while you get an amazing view, they’re designed for places where you don’t need to open a window. 

Another difference is that casement windows are usually made up of lots of sashes and panes in one frame, while a picture window is typically one large pane, which allows you to take in the view with nothing in the way.

Are casement windows secure?

The frames of casement windows have hook-shaped locks, which make it very difficult for a potential intruder to break into them. Some intruders have been known to try and pry these sorts of windows open, but you can be assured that this is very difficult with newer casement windows, as there’s a multi-locking system for layers of protection. 

Kayvex is a member of an Official Police Security Initiative , which means we spend a lot of time perfecting the security of our window designs. This means you can feel confident that your windows are secure and safe

What do casement windows cost?

Casement windows can vary in cost, depending on the materials chosen, the complexity of the installation and how the job takes. Replacing like for like casement windows in an existing frame will be less labour intensive and cost less than installing completely new casement windows.  

The cost of the windows will also depend on the style you choose. uPVC is the least expensive option, while timber or aluminium frames tend to cost a little more. The best way to find out the price is to contact us for a no-obligation quote and we can discuss your options in more detail.

Is it worth installing casement windows?

If you want to let light and air into your home, then casement windows give rooms a fresher feel. They can improve insulation in your home, with a strong seal that fits on the sash, keeping warm air inside and cool air outside during the winter. This can help reduce your energy bills. 

Another advantage of casement windows is that they’re easy to use, even if you have limited mobility. They are opened and closed with a simple crank mechanism, which takes little effort to operate, so they usually have a one-handed function.  


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Features and benefits

Guarantees you can depend on.

We have built up a great reputation over years of delivering a first class service and excellent products, all from our local, no nonsense all-about-you company.

From characteristic country cottages to contemporary town houses, we’re confident that our products will offer a style and finish to truly transform your home. Through constant innovation the quality, durability and security of our products is genuinely second to none. As a local company we are proud to offer British Standards BS7412/PAS24 for enhanced security.

We refuse to compromise on quality

Our windows are made from British Made, high quality MarinespecTM components, with up to 25 years anti corrosion. They are built specifically for the more exposed areas of corrosion, such as coastal environments to give you worry free performance beyond your guarantee.  We believe spending more on components is worth every penny, and sets us apart from our competitors.

State of the art fabrication for best quality

We have invested millions of pounds into one of the most state of the art manufacturing facilities in the UK.  This enables us to provide you with consistently high quality products at exceptionally good prices. Our loyal factory workers are well trained and take pride in their work, they really care about quality.  Our machines are maintained according to a rigorous servicing regime to keep them in top condition.

Superior energy efficiency

Our ‘A’ rated energy efficient and triple glazed windows are tested by the BFRC, which will save you money on your heating bills. By law your windows and doors have to meet strict thermal performance regulations but you can be rest assured that our products exceed current requirements.

Energy saving is incredibly important and so is keeping your fuel bills down. We are continuously looking for ways to make our homes energy efficient and one way is to choose new PVCu windows and doors. Not only will they help to keep your home warmer, they will reduce your energy loss.

Don’t just take our word for it!

Our suppliers conform to strictly controlled and independently monitored Quality Management Systems such as ISO 9001, to ensure that everything is done correctly and according to best practise.

Our windows are tested independently by British Standards for security, weather tightness and strength performance. This means that periodically, we have to send them to independent test houses, in order to be tested to destruction.

These are just some of the many standards the products in our vast range conform to. Needless to say we take the quality of our products very seriously indeed.


Made to measure

The styles available are endless and the choices to suit your home are bigger than ever before. Traditional, contemporary or modern; our versatile window and door designs will create the look you want to complement and enhance your home. If you want windows that are as individual as you, our range of coloured and woodgrain windows offer you fifteen different colours and finishes.

A local business that really cares about its customers

Our sales consultants, surveyors, admin team and installers really care about you and your home. They are highly trained, motivated and want to go the extra mile to do the best possible job. Our fitters will treat your home with care and respect and will take time to ensure that you are delighted with the end result.

With a local showroom including an extensive display and experts on hand you can see before you buy and meet the team!

An effortless purchase process

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