If you are looking to replace your windows, you will notice that there are many different styles to choose from. Two extremely popular styles amongst South West homeowners are casement windows and sliding sash windows. But which out of these two favourite styles is more expensive? In this buyers guide we will break down the differences between these two types of window to help you get a better understanding of the price points, features, and benefits of each.

Double glazed sliding sash windows

The difference between casement windows and sliding sash windows

The main difference between casement windows and sliding sash windows is the way that they function and open:

Sliding sash windows, also known as vertical sliding or box sash windows, are designed to replicate traditional Georgian or Victorian timber windows that slide open vertically as opposed to casement-style windows that open outwards. Balancers counter the weight of the sashes to provide easy operation and to allow the sashes to remain open in any position. On a single hung window the top sash is fixed and the bottom sash operates vertically.

Casement windows are attached to the frame by one or more hinges and a mechanism that cranks the window outwards, away from the home. The standard casement window will swing open outwards, like a door. However, you can have hinges fitted to the top to create an awning casement whereby the window swings open outwards from the top of the frame.

Window costs: material choice

The cost of new windows, no matter what style you opt for, is largely influenced by the type of material they’re made from. Here at Emerald, we are proud to offer our all of our casement and sliding sash windows in either innovative uPVC or contemporary aluminium.

uPVC: uPVC is well-known as the most affordable window frame material thanks to it being relatively cheap to produce. Not only is uPVC the most affordable window material option, but it also comes with a multitude of very attractive benefits. uPVC is virtually maintenance-free, extremely energy efficient, and comes in a huge variety of colours and finishes.

Aluminium: Aluminium is the second most affordable window frame material. Our modern aluminium windows offer incomparable strength, providing excellent home security. An inherently sturdy and long-lasting material, it’s also weather-resistant and maintenance-free, able to last over 50 years.

Timber: Wooden windows normally have the highest price tag due to the specialist installation process involved, their high energy efficiency, and long-lasting qualities. Despite the natural beaty and charm of timber, wooden windows come with the need for regular maintenance which can be both time consuming and costly. If you want the aesthetic of timber without the upkeep, why not check out our timber effect window range.

White casement windows with Georgian bars

Window costs: size

The size of your home and the number of windows needed are also crucial points to consider when getting a cost for your replacement windows. Generally speaking, the more windows you need installing, or the bigger the size of the windows, the more expensive the installation will be regardless of what style you choose. If your home requires bespoke or made-to-measure windows, this will also add to the overall cost.

Window costs: style

Different window styles require different amounts of skill, time, and effort to install. Generally speaking, uPVC casement windows are the quickest, easiest, and most economical to install; making them one of the most popular affordable window styles in Britain.

Some window styles have more complex opening mechanisms or installation processes which can affect the price.

Window costs: other factors to consider

Other factors that can affect the price of new windows include:

  • The type of building or area e.g. buildings located in conservation areas.
  • Additional features such as decorative Georgian Bars, or security upgrades such as key lockable handles, security brackets, opening restrictors, and night vents.
  • Colour/finish e.g. coloured frames/woodgrain effects.
  • Upgrading to triple glazing for further energy efficiency, thermal efficiency, and security.

Replacement windows from Emerald

It can be frustrating to discover the majority of double-glazing specialists out there don’t generally put a specific price on UK window cost, but this is because each job is bespoke to your specific home, needs, and requirements. The best way to get an accurate price is to get a free, no obligation quote.

If you are thinking of replacing your windows, why not get in touch with the Emerald team for a quote that is as bespoke as the job itself. We offer various other home improvements as well, so no matter what your ideas may be, let us make them a reality. Use our online form to contact us or call us on 01793 700 142 or 0800 612 4154.


Areas we serve

Swindon-based family run double glazing installers

With a head office in Swindon, a short trip from the motorway, we are ideally located to offer our services across Wiltshire, Reading, Bath, Bristol, Marlborough, Berkshire, Gloucestershire, Oxfordshire, and other surrounding locations.

Emerald provide and install home improvements in all materials – uPVC, aluminium and traditional timber. No matter what material you choose, you can be sure we’ll provide you consistent quality – our work is always finished to the highest standards, whether you’re installing 2 windows or 20!

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What our customers are saying

We pride ourselves on the hundreds of customer reviews that we have collected over our many years of trading. Why not read some of our testimonials yourself, and see how our customers have rated their experience with our service.

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Replacing patio door with a window

Emerald windows were brilliant. The patio door was removed and replaced with a window. All work was carried out from bricking up the outside to plastering the inside. Great work...

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Lesley B

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Local Family Friendly Company

We worried about choosing a window company. We looked at all the usual national firms but we preferred the feel of a smaller local family run business as the rep...

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Stephanie C

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Very Pleased

Very pleased with the whole process from Mark letting us see and touch the product in the showroom in Swindon (many don't!), to a transparent price breakdown, no "buy now...

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Casey Collins

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Highly Recommended

Highly recommend Emerald Windows and Doors; new Front and back doors fitted yesterday. Cannot praise Mark the Fitter enough, courteous, friendly and very helpful. Top job with attention to detail...

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Michelle Webb

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Emerald Windows – A Quality Product

Emerald windows have just installed a new composite front door to our property. We are very pleased with the product and the installers were polite, professional and have carried out...

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Richard K

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