UPVC Mock Sash Windows

Traditional Style Without the Sash Window Price Tag

Love the character of traditional sash windows? Discover how mock sash horn uPVC casement windows offer a more affordable way to achieve the classic look, with the practicality of modern window design.

By the
Nicolas Hawke
Nov 2026
·
3 minutes
White uPVC mock sash horn casement windows with traditional glazing bars, fitted to a red brick home in Leicester, combining classic styling with modern window performance.

Traditional sash windows have a timeless appeal. Their elegant proportions and distinctive detailing suit everything from period properties to homes looking to introduce a little more character.

But if you love the traditional sash window look without the additional cost associated with a uPVC vertical sliding sash design, there's another option worth considering.

Mock sash horn uPVC casement windows offer a clever way to achieve that classic appearance while enjoying the benefits of modern window technology.

The traditional look, with a modern twist

Mock sash horn uPVC windows are designed to recreate the appearance of traditional timber sash windows. Decorative horns at the bottom of the opening sashes help replicate the distinctive detailing found on original sliding sash designs.

From the outside, they offer a very similar aesthetic, making them an attractive choice for homeowners who want to retain a traditional appearance.

The difference is in how they operate. Rather than sliding vertically, mock sash horn windows open outwards on side hinges, just like conventional casement windows.

Anthracite grey uPVC mock sash horn casement windows with traditional glazing bars, fitted to a modern Leicester home, combining period-inspired styling with contemporary performance.
Traditional sash window styling meets contemporary design with anthracite grey uPVC mock sash horn windows.

A more affordable alternative

One of the biggest advantages of mock sash horn windows is their affordability.

Traditional vertical sliding sash windows have more complex opening mechanisms and construction, which can make them a more expensive option.

Mock sash horn casement windows offer a similar traditional appearance without the additional complexity of a sliding mechanism. For homeowners working to a budget, this can be a practical way to achieve the look they want without compromising on style.

The benefits of modern uPVC

Alongside their traditional appearance, mock sash horn windows offer all the practical advantages associated with modern uPVC window design.

  • Energy efficiency: Modern double glazing and effective weather seals help reduce heat loss and keep your home comfortable.
  • Low maintenance: uPVC frames don't require regular painting or varnishing.
  • Everyday practicality: Conventional casement opening mechanisms are straightforward to operate and maintain.
  • Design flexibility: A choice of colours and finishes makes it easier to complement your property's existing character.
White uPVC mock sash horn casement windows with traditional glazing bars, bringing natural light into a bright Leicester home.
Enjoy the timeless charm of traditional sash window styling with bright, energy-efficient modern uPVC casement windows.

Quality window profiles from Kömmerling

Our mock sash horn windows are manufactured using high-quality Kömmerling window profiles, combining traditional styling with modern engineering. The Kömmerling Flush Sash system offers excellent thermal performance, carefully designed detailing and a choice of colours and finishes, helping you achieve the look you want without compromising on everyday performance.

You can find out more about the Kömmerling Flush Sash window system on the manufacturer's website.

A great choice for traditional homes in Leicester

Whether you live in a period property or simply prefer a more traditional window style, mock sash horn uPVC windows offer an appealing balance between classic design and modern performance.

At Abbey Windows Leicester, we supply and install uPVC mock sash horn windows for homeowners across Leicester and Leicestershire.

If you're considering replacing your existing windows, they could be the ideal way to refresh your home while retaining the character you love.

Looking for traditional window styling at a more affordable price? Explore our range of uPVC mock sash windows and discover the possibilities.

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Thinking about your own project?

Speak to the Abbey Windows Leicester team for friendly advice and inspiration tailored to your home.

Whether you’re replacing tired windows or planning a larger renovation, we’re here to help you explore the right options for your property.
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