Vertical Sliding Sash Windows

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.

At Secure Trade Frames, our vertical sliding sash windows combine the timeless elegance of traditional timber sash designs with the durability and modern performance of advanced materials. Whether you live in a period property or within a conservation area, our uPVC vertical sliding sash windows deliver exceptional energy efficiency, smooth operation, and authentic detailing, such as run-through sash horns and astragal bars.

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Why Choose Our Vertical Sliding Sash Windows

Traditional Timber Appearance

Our vertical sliding sash window designs replicate the look of timber sash windows, providing a heritage aesthetic ideal for period homes, without the ongoing maintenance of traditional timber frames.

High Energy Efficiency

Engineered with advanced double-glazed units, our uPVC sliding sash windows significantly improve thermal efficiency, helping to reduce heat loss and enhance comfort while lowering household energy bills.

Smooth Vertical Slider Mechanism

Each vertical slider is precisely balanced to ensure smooth, effortless movement. The sliding mechanism reflects how traditional sash windows are designed, delivering reliable operation for everyday use.

Low Maintenance Materials

Our uPVC sash windows are built from high-quality materials that resist warping, fading, and weather damage, providing the beauty of traditional timber without the upkeep or repainting.

Authentic Period Detailing

Features such as run-through sash horns, astragal bars, and a woodgrain finish allow our vertical sliding sash windows to retain the character of classic box sash windows while offering high-performance durability.

Easy Clean Functionality

Designed with convenient, easy clean functionality, our windows allow both sashes to tilt inward, making cleaning safer and easier from inside your home.

Designed for Heritage Style and Modern Living

Our Vertical Sliding Sash Windows are carefully engineered to respect traditional architectural styles while delivering the performance expected in modern homes. Historically, sash windows combine elegant proportions with a practical sliding design that has remained popular for centuries.

At Secure Trade Frames, we have taken this heritage concept and enhanced it with advanced materials and manufacturing techniques. Our uPVC vertical sliding sash windows replicate the appearance of timber sash frames while offering superior thermal efficiency, weather resistance, and durability. With options such as astragal bars, run-through sash horns, and an authentic woodgrain finish, these windows maintain the charm of traditional timber.

Each vertical sliding sash window is manufactured to high standards, featuring double-glazed units that ensure energy efficiency and excellent insulation while preserving the classic look homeowners love.

Get your FREE Quote

Get Your Free Quote

If you are looking to upgrade your home with high-quality vertical sliding sash windows, our team at Secure Trade Frames is ready to help. We provide expert advice, tailored solutions, and professional installation across the UK. Whether you need replacement box sash windows, modern uPVC sash windows, or solutions suitable for conservation areas, we can guide you through the process. Request your free, no-obligation quote today and discover how our vertical sliding sash windows can transform your home with traditional style and modern performance.

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Our Process

Installing your new vertical sliding sash windows is simple and stress-free with our streamlined process. Our experienced team manages every stage, ensuring a smooth journey from enquiry to installation while delivering high-quality workmanship and reliable results.

Step 1: Initial consultation and home survey to assess your property and discuss styles, finishes, and sash window features suitable for your home.
Step 2: Made-to-measure manufacturing of your uPVC vertical sliding sash windows using premium materials and precise specifications.
Step 3: Professional preparation and scheduling by our experienced team to ensure minimal disruption during installation.
Step 4: Expert fitting and final inspection to ensure your vertical sliding sash windows deliver outstanding thermal efficiency, smooth operation, and long-lasting performance.

Our uPVC sliding sash windows are available in a wide range of stylish finishes to complement every property. Choose from classic white, heritage shades, or authentic woodgrain finish options that replicate traditional timber. We also offer bespoke RAL colour choices, allowing you to perfectly match your windows to your home’s exterior while maintaining the classic appearance of timber sash windows.

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Built for Performance and Longevity

Modern vertical sliding sash windows must do more than simply look attractive. At Secure Trade Frames, every vertical sliding sash window is designed with high-performance engineering to ensure durability, reliability, and lasting comfort.

Our UPVC vertical sliding sash windows incorporate advanced seals and precision manufacturing to maximise thermal efficiency and reduce drafts. Combined with double-glazed units, these windows significantly improve insulation compared to older box sash windows.

The result is a window that retains the character of traditional timber sash frames while providing the modern performance homeowners expect today. Durable materials and expertly engineered vertical slider mechanisms ensure smooth operation and long-term reliability.

Perfect for Period Homes and Conservation Areas

Many homeowners want to maintain the charm of traditional architecture while benefiting from improved comfort and efficiency. Our vertical sliding sash windows are ideal for achieving that balance.

Designed to reflect the proportions and details of timber sash windows, these windows preserve the appearance of classic box sash windows while offering the durability of modern materials. Features such as run-through sash horns, authentic astragal bars, and realistic woodgrain finish ensure a genuine heritage look.

Because our uPVC sash windows replicate traditional designs so closely, they are often suitable for properties in conservation areas, where maintaining the building’s original character is essential. At the same time, the inclusion of double-glazed units and advanced seals provides excellent energy efficiency and thermal efficiency.

With Secure Trade Frames, homeowners can enjoy high-quality vertical sliding sash windows that respect traditional architecture while delivering the comfort and reliability of modern window technology.

Call us on 0116 261 1155

Enhance Your Home with Vertical Sliding Sash Windows

Upgrade your property with beautifully crafted Vertical Sliding Sash Windows from Secure Trade Frames. Combining the elegance of traditional timber sash design with the durability of uPVC sash windows, our solutions deliver outstanding energy efficiency, authentic style, and high-performance reliability.

Contact our team today to request a quote and discover how our vertical sliding sash windows can enhance the comfort, appearance, and value of your home.

Contact

Real Homes. Real Results

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

Vertical Sliding Sash Windows are a traditional window style where two sashes slide up and down within the frame. A modern vertical slider mechanism uses balanced springs or weights to enable smooth movement and secure positioning. These sash windows are designed to provide ventilation, classic aesthetics, and modern performance while maintaining the heritage look of traditional box sash windows.

Yes, UPVC vertical sliding sash windows are designed to replicate the appearance of traditional timber sash windows. With features like woodgrain finish options, run-through sash horns, and astragal bars, they closely match historic designs. This makes them ideal for period homes where homeowners want to preserve character while benefiting from the durability and low maintenance of modern UPVC materials.

Modern vertical sliding sash windows significantly improve energy efficiency compared to older timber sash windows. They incorporate advanced seals and double-glazed units that reduce heat loss and improve thermal efficiency. This helps maintain indoor temperatures, reduce drafts, and lower energy bills while preserving the traditional appearance that many homeowners want in period-style properties.

In many cases, vertical sliding sash windows can be installed in conservation areas, particularly when they replicate traditional timber sash designs. Options such as woodgrain finishes, authentic sash window features, and period detailing help maintain the original appearance of historic properties. However, approval may depend on local planning guidelines, so a professional survey and consultation are recommended before installation.

Vertical sliding sash windows are available in a wide selection of colours and finishes. Homeowners can choose classic white, heritage tones, or authentic woodgrain finishes that mimic traditional timber. Bespoke RAL colour options are also available for a fully customised look. These finishes allow windows to blend seamlessly with both period properties and modern homes.

Yes, modern vertical sliding sash windows typically include high-quality double-glazed units as standard. These improve insulation, reduce noise, and enhance overall thermal efficiency. In situations where existing sash windows must remain, vertical sliding secondary glazing for sash windows can also be installed, providing improved energy efficiency while preserving the original frames.

Yes, most modern UPVC sliding sash windows feature an easy-clean design. The sashes can tilt inward, allowing both sides of the glass to be cleaned safely from inside the property. This practical feature makes maintaining the windows much easier compared to traditional sash windows, which require external access for cleaning.

Run through sash horns and astragal bars are decorative sash window features that replicate traditional timber window designs. Run through sash horns strengthen the frame while adding an authentic period detail. Astragal bars divide the glass into smaller panes, creating the classic appearance associated with historic box sash windows and traditional architectural styles.

Installation time can vary depending on the number of windows to be replaced and the project's complexity. However, most vertical sliding sash window installations are completed within one to two days. Professional installers work efficiently to ensure minimal disruption while maintaining high-quality standards and ensuring the windows are fitted correctly.

Yes, professional window companies typically manage the entire process from initial survey to final installation. This includes assessing your property, taking precise measurements, recommending suitable vertical sliding sash window options, and arranging expert fitting. Handling everything in-house ensures a smooth experience and guarantees the windows are installed correctly.

Yes, high-quality vertical sliding sash windows are manufactured to meet current UK building regulations. This includes standards for thermal efficiency, safety glazing, and overall performance. Compliance ensures that the windows provide reliable insulation, durability, and safety while meeting the requirements expected for modern residential properties.

Most reputable installers provide guarantees on both the windows and the installation work. This typically covers manufacturing quality, glazing performance, and workmanship for a specified period. A guarantee offers peace of mind that your vertical sliding sash windows are built to last and that they are supported by professional aftercare if any issues arise.

Serving Leicester Since 2011

A-Rated Energy-Efficient Windows

Written Product & Workmanship Guarantees