Serving Leicester Since 2011

Trusted local window and door specialists.

A-Rated Energy-Efficient Windows

Designed to reduce heat loss and improve comfort.

Written Product & Workmanship Guarantees

Peace of mind built into every installation.

Heritage Style, Modern Performance

Discover the timeless charm of mock sash horn windows, blending period elegance with contemporary functionality. Our UPVC mock sash horn windows recreate the traditional sash aesthetic while delivering energy efficiency, security, and low maintenance. Designed to suit heritage homes, these windows replicate the look of a vertical sliding window but open fully, offering versatile design options such as top-hung casement, tilt-and-turn, and runthru horn styles.

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Why Choose Mock Sash Horn Windows

Our mock sash horn windows offer the perfect balance between heritage styling and modern practicality. Unlike traditional sliding sash windows, they open outward with fully functioning sashes. Available as a top opener over fixed panes, a runthru horn over tilt-and-turn, or full tilt-and-turn designs, they deliver energy efficiency, low maintenance, and enhanced security. Double or optional triple glazing ensures comfort while maintaining classic aesthetics. With authentic sash horns, woodgrain finishes, and a range of colours, our windows are a cost-effective alternative to timber sash windows, ideal for period-style homes without compromising on modern performance.

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Get Your Free Quote

Ready to upgrade your home with UPVC mock sash horn windows? Fill in our simple form, and our Leicester-based team will provide a free, no-obligation quote. Benefit from expert guidance, precise measurements, and professional installation from trusted local specialists.

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Our Process

At Secure Trade Frames, we make your window replacement straightforward and stress-free:

  • Step 1: Initial enquiryTell us your requirements via form, phone, or email.
  • Step 2: Professional surveyWe visit to take accurate measurements and advise on layouts
  • Step 3: Made-to-measure manufacturing Your windows are custom-built to specification.
  • Step 4: Expert installation Fitted by our certified team with final checks and handover.
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Our mock sash horn windows are available in a broad palette of colours, including classic whites, greys, and woodgrain finishes. Whether you prefer a subtle neutral tone or a rich, traditional timber look, we can match your home’s exterior perfectly while maintaining heritage appeal.

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Modern Performance with Traditional Appeal

Our UPVC mock sash horn windows combine elegance with durability. Unlike traditional timber sash windows, they resist warping, splitting, and rot, reducing maintenance and extending lifespan. Fully opening sashes allows ventilation, and high-security locks protect your property. Double- or triple-glazing improves thermal efficiency, while design options maintain an authentic sash appearance. Ideal for heritage homes, they provide the perfect balance of style, comfort, and practicality.

Why Secure Trade Frames?

As trusted installers in Leicester and the surrounding areas, we specialise in mock sash horn windows. From initial survey to installation, our experienced team ensures accurate measurements, professional fitting, and reliable workmanship. We offer local expertise, clear pricing, and installation guarantees, making us your first choice for heritage-style window replacements that combine authentic aesthetics with modern performance.

Call us on 0116 261 1155

Flexible Styles for Every Home

Choose from fixed dummy sash, top opener over fixed pane, runthru horn over tilt-and-turn, or full tilt-turn sash designs. Each window is energy efficient, fully opening, and incorporates authentic sash horn detailing. Night ventilation and inward tilt options add practicality, while compliance with Part B building regulations ensures safety and reliability for your home.

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Real Homes. Real Results

James Hughes profile picture
James Hughes
11:05 16 Mar 26
We've used Secure Trade previously for our windows and were very happy with the price and quality of work. We recently had quotes for a new front door and porch doors, Jason talked us through the options for replacing both sets of doors and in the end we went with Jason's recommendation to remove the porch doors completely and replace just the front door. The fitters were professional and have done a great job, we're well pleased with the result.
Dan10 profile picture
Dan10
12:20 13 Mar 26
Really good experience from start to finish. Survey and quotation completed quickly. Great communication on design and advice around what style, fittings and doors would work for us.

Everyone we met was punctual, polite and took time to explain the process and answer questions.

The fitters were top notch. They worked with us to get things done properly, allowing us time to think and plan around other tasks.

They took a lot of pride in getting things just so and the banter was genuine and funny especially whem they were cleaning up.
Which they did each day and made sure we were always left secure and safe.

When there were issues they took responsibility for getting it sorted. No need for us to chase or complain. A unit damaged in transit was replaced within 4 days.

Great from start to finish - thankyou Jason, Rob and Eric.
Niam Modi profile picture
Niam Modi
23:03 17 Feb 26
Great product and service from Secure Trade Frames. Recently replaced 3 windows, front and back door. Could not be happier. The service from beginning to end was great. Jason was very helpful and made the entire process very easy. The fitters were very friendly and professional. I would certainly recommend.
D P profile picture
D P
21:18 14 Feb 26
We recently had new windows fitted by Secure Trade Frames. I couldn’t be happier with the results. From start to finish, the service was professional, reliable, and stress-free. Jason and Denise’s responded promptly to all my queries, Rob was punctual, tidy, and clearly takes great pride in his work.

The windows are of excellent quality and the installation was completed to a very high standard. Everything was left clean and tidy afterwards, and Rob took the time to make sure we were completely satisfied before leaving.

I would highly recommend Leicester Secure Trade Frames to anyone looking for new windows – fantastic workmanship and great value for money. Thank you again!
Brian Geier profile picture
Brian Geier
17:01 13 Feb 26
We had a replacement set of upvc French doors fitted. Quality is superb. Fitted in a morning. Fitter was first class and left my house clean and tidy. Would definitely use again. Very happy customer!
Katie Hill profile picture
Katie Hill
21:07 02 Feb 26
We had a new front door fitted and super happy with it. We’d been debating a new door for a while as the original one on our new build (10 years ago) has always been drafty. So Jason came over, measured up, got a quote, wasn’t pushy. WE LOVE IT. Chap that fitted it was great, so conscientious and did a fab job. Would def have these over to fit windows too. Thanks 🙂
Dan Legate profile picture
Dan Legate
17:30 29 Jan 26
We recently had all of our old box sash single-glazed windows removed and replaced with uPVC double glazing, along with having our back door replaced. From start to finish, the whole process was smooth and well organised.
The fitters arrived on time, were polite and professional throughout, and clearly took pride in their work. They worked efficiently and made sure everything was fitted properly, and they also kept disruption to a minimum. Once the job was finished, they left the house clean and tidy, which we really appreciated.
We’re extremely pleased with the quality of the windows and door and have already noticed the difference they’ve made. Overall, it was a great experience and we wouldn’t hesitate to recommend Secure Trade Frames to anyone considering new windows or doors.
Admin Support profile picture
Admin Support
07:37 28 Jan 26
I recently had patio doors fitted by Secure Trade Windows and the service was excellent from start to finish. Communication was clear and helpful throughout, the team arrived on time, and the installation was carried out to a very high standard. The fitters were professional, polite, and left everything clean and tidy. The doors look amazing and are great quality. I’m extremely pleased with the result and wouldn’t hesitate to recommend Secure Trade Windows to anyone.
Cathy Hennessy profile picture
Cathy Hennessy
18:58 16 Jan 26
We had STF to replace most of windows and doors. It was a very professional service and the quality of the products were excellent. The workmanship was great and they took away the windows they took out. They cleaned up after themselves and were respectful and polite. Out of 3 quotes they came in the most competitive for a premium product.
We will definitely use them again for our bifolds when we renovate our kitchen.
Jackie Beattie profile picture
Jackie Beattie
17:43 15 Apr 25
We had new windows to the front of the house and modern black framed french doors, leading out to the conservatory, all made and fitted by Secure Trade frames.
The quality was exceptional and the fitters were professional, clean and fit everything to a high standard.
We would definitely recommend them!
Ian Nutting profile picture
Ian Nutting
08:58 07 Apr 25
Really happy with our decision to go with Secure Trade Frames to replace our windows. Very competitive pricing, with excellent fitting, leaving no mess and taking a lot of care over the final finish. Thoroughly deserved the 5 star rating.
Laura Bramley profile picture
Laura Bramley
11:34 01 Apr 25
We had our new front door fitted and supplied by Secure Trade Frames LTD and we are absolutely thrilled with how its turned out! There knowledge, professionalism, attention to detail and how clean and tidy they work is outstanding and we will definitely be using them again when it comes to changing our windows in the future! Thank you so much 👍🏼
Graham Cleaver profile picture
Graham Cleaver
18:53 21 Mar 25
We had a fantastic experience with Secure Trade Frames from start to finish. By far the cheapest of the four quotes we had and by far the best attention to detail, personal attention and service. We had a replacement front door and window, replacement back door and replacement French doors. The finish is excellent and we couldn’t be more pleased.
Sam G profile picture
Sam G
10:40 06 Mar 25
I can't rate Secure Trade Frames highly enough, we had an awkward job that needed doing in a tight timeframe and Jason and his team came through to get the job done with no issues whatsoever! I would highly recommend these guys.
Steve Plant profile picture
Steve Plant
14:37 05 Mar 25
I required urgent attention to the locking mechanism on my front door and contacted Secure Trade Frames online. They were very quick to get back in touch and an appointment was made with a clear estimate of what the costs would likely to be, based on a couple of options regarding potential faults. I had to change the agreed time at short notice but they re jigged their arrival to fit in with my availability. On arrival the work was completed efficiently and in a cheerful manner. Payment went just as well via card across the phone. In short from the initial contact to final payment the process was smooth and trouble free - would certainly use again and recommend - Steve Plant
Mohit Sharma profile picture
Mohit Sharma
11:49 18 Feb 25
Excellent service from start to finish and a very quick turnaround time on making the doors. I would recommend Secure Trade Frames highly given the great experience I've had with them.
Ryan Armitage profile picture
Ryan Armitage
16:21 16 Feb 25
We at Armison have been using secure trade windows over the past 10 years. They have always gone above and beyond in helping us out on our projects.
We would definitely recommend them for any of your window/doors and conservatory projects.

Honest, reliable, affordable and outstanding workmanship

Thanks Jason and team
Josh Pearce profile picture
Josh Pearce
09:55 09 Nov 24
Had some windows replaced recently by Secure Trade Frames, excellent job and service from
Jason & his team. Highly recommend, I will certainly be a returning customer.
Photo from customer review
Fiona B profile picture
Fiona B
21:35 30 Oct 24
From the quote to the installation I can not fault the team. Jason is a great contact in terms of need, Lewis and partner arrived, carried out the work, on time, polite, clean and work was on point. Denise was overseeing everything. Would highly recommend this team

Mock sash horn windows are modern upvc windows designed to replicate the look of traditional vertical sliding sash windows. They feature decorative sash horns and outward-opening sashes, providing the heritage appearance of timber sliding sashes while offering the benefits of energy efficiency, low maintenance, and secure, fully functioning modern window operation suitable for period-style and contemporary homes alike.

While traditional sliding sash windows move vertically within the frame, mock sash windows only mimic this appearance. They don’t slide; instead, they open outward, as in top-hung or tilt-and-turn styles. This avoids the mechanical complexity of sliding sashes, making them easier to maintain, more secure, and thermally efficient, while still retaining the classic vertical sash aesthetic that complements heritage or period properties.

Sash horns are the decorative extensions at the top and bottom of a window sash that replicate the joinery of traditional sliding sash windows. They are a key feature in preserving period aesthetics, adding authenticity and character to mock sash horn windows, and ensuring your replacement windows maintain the heritage appearance expected in period or conservation-style homes.

Yes, our UPVC mock sash horn windows are highly energy efficient. They feature double glazing as standard, with optional triple glazing for enhanced thermal performance. Combined with thermally broken upvc frames, these windows help reduce heat loss, lower energy bills, and maintain a comfortable internal temperature, all while preserving the authentic look of traditional sash windows.

Mock sash horn windows open outward rather than sliding vertically like traditional sashes. They are commonly available in top-hung casement or tilt-and-turn styles, allowing full opening for ventilation while maintaining the appearance of a vertical sliding window. This design improves ease of use and security and reduces the maintenance issues associated with older sliding sash mechanisms.

Absolutely. Mock sash horn windows are versatile and can be customised to suit your home. You can choose top hung casement windows, which open from the top, or tilt-and-turn styles that offer inward tilt for ventilation or full opening for cleaning and airflow. This flexibility ensures your windows meet both aesthetic and practical needs.

Yes. Upvc mock sash horn windows are a cost-effective alternative to traditional timber sash windows. They replicate the classic timber look without the ongoing maintenance, are more secure, thermally efficient, and resistant to rot or warping. This makes them ideal for homeowners who want the period charm of timber sash windows but with modern, practical performance.

Yes, all our installations comply with Part B of the Building Regulations where required. This ensures fire safety and that proper escape routes are considered. Our windows are professionally surveyed and fitted to meet regulations, giving you peace of mind that your mock sash horn windows are safe, compliant, and suitable for use in both new builds and heritage-style homes.

Yes, optional night ventilation and inward tilt functionality are available on our mock sash horn windows. These features allow secure ventilation while maintaining home safety and thermal efficiency. Inward tilt also makes cleaning easy from inside the property, combining practicality with heritage styling without compromising the authentic sash appearance.

Our made-to-measure mock sash horn windows typically take four to six weeks from order to delivery, depending on your chosen style, glazing, and colour finishes. Each window is custom-manufactured to your exact measurements, ensuring a perfect fit and authentic heritage appearance, with professional installation scheduled promptly after production for a seamless upgrade experience.

Yes, we manage the entire process from start to finish. Our team provides a professional survey to measure and advise on layouts, manufactures your windows to exact specifications, and conducts expert installation. This end-to-end service ensures your mock sash horn windows are fitted correctly, function perfectly, and meet both aesthetic and regulatory requirements.

Yes, every installation of mock sash horn windows comes with a full guarantee. This covers workmanship and ensures your windows remain secure, energy efficient, and visually authentic. Our commitment to quality and reliability provides peace of mind, giving you confidence that your investment in heritage-style windows is protected for years to come.

Absolutely. Mock sash horn windows are designed to replicate the appearance of traditional sliding sash windows, making them ideal for period, heritage, or conservation-style homes. They provide an authentic aesthetic while offering modern benefits, including improved security, energy efficiency, low maintenance, and fully opening sashes for ventilation, seamlessly combining style and practicality.

Yes, triple glazing is available on our mock sash horn windows. This upgrade enhances thermal efficiency, reduces noise, and improves overall comfort without compromising the traditional sash appearance. It’s ideal for homeowners seeking maximum energy performance while maintaining the authentic period look of their property.

Get Your Free Quote

Ready to transform your home with energy-saving windows and doors?

Fill out the form below and our team at Secure Trade Farmes will be in touch with your free, no-obligation quote.

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