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.

Modern Energy Efficiency. Expertly Fitted.

Made-to-Measure Flush Casement Windows

Secure Trade Windows specialises in supplying and installing high-quality flush upvc casement windows. Designed to replicate the elegant appearance of a traditional timber window, our flush windows combine refined aesthetics with superior thermal performance. Every window is double glazed, meets modern building regulations, and is fitted by our expert fitting team to ensure enduring beauty and maximum energy efficiency.

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The Flush Casement Advantage: Bringing Comfort and Character to Your Home

Why Choose Flush Casement Windows?

Timeless Aesthetics: The clean, flush-fit window design offers a refined look that enhances the curb appeal of both period and contemporary homes.

Superior Energy Performance: Designed to minimise gaps and heat loss, our frames exceed modern energy-efficient rating standards, helping to lower your utility bills.

Custom Colour Options: Personalise your home with our extensive range of colour choices, including the highly popular agate grey flush casement windows and other modern grey flush casement windows.

Double or Triple Glazing: Choose from double-glazed as standard or optional triple glazing for maximum sound reduction and thermal efficiency.

Peace of Mind: Durable uPVC and secure locking systems provide exceptional weather performance and long-term security.

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

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Explore Our Flush Casement Options

1. uPVC Flush Casement Windows
Combining traditional styling with modern, low-maintenance performance.
2. Aluminium Flush Casement Windows
For ultra-slim sightlines, exceptional strength, and a modern, architectural finish.
3. Flush Casement Timber Windows
Achieve the rustic aesthetic of wood with the durability and efficiency of modern uPVC.
4. Flush Sash Windows
Simple, streamlined appearance and excellent thermal performance. Suitable for a wide range of homes with design features such as astragal bars, trickle vents and various glazing options.

Choosing new windows or doors is about finding a finish that complements your home beautifully. That’s why Secure Trade Windows & Doors Ltd offers a wide range of colour options for UPVC windows, composite doors, bifolds and roofline products. Whether you want a classic white frame, the warmth of woodgrain, or a bold contemporary shade, we help you match the look and character of your property. Every finish is durable, low-maintenance and designed to stay vibrant for years to come.

View all colour options

Why Homeowners Choose Secure Trade Windows

Reliable Flush Casement Windows with a Full Supply & Fit Service

We provide a complete, stress-free home improvement service built on quality, clarity, and trust. We focus on the things that matter most to our customers:

Professional Installation, Guaranteed: Your windows are fitted by our dedicated expert fitting team who guarantee precision. We back all work with a full installation guarantee for complete peace of mind.

Unbeatable Quality & Value: All our frames and glazing, including our popular uPVC flush casement windows, come from trusted manufacturers. We deliver high-performing systems at competitive pricing.

Complete Start-to-Finish Service: From the initial made-to-measure survey to the final check, our process is clear and straightforward. You get reliable support from our experienced team every step of the way.

From Survey to Installation | A Complete Start-to-Finish Service

Our Process

Our complete process ensures accuracy and a clean, stress-free finish:

Step 1: Free Home Survey

Precise, made-to-measure readings taken by our specialists.

Step 2: Manufacturing

High-quality flush casement windows produced to your exact specification with efficient lead times.

Step 3: Fitted by Specialists

Fitted securely by our expert fitting team using strong sealed units.

Step 4: Final Check & Guarantee

We confirm satisfaction and issue your full 10 Year installation guarantee for long-term peace of mind.

Call us on 0116 261 1155

Built for Performance, Designed for Elegance

Our flush casement windows are engineered for a perfect blend of form and function. The Traditional Flush Fit Design, where the sash sits perfectly level within the window frame, creates the refined, minimal look of classic timber with the benefits of modern uPVC. Whether you are undertaking renovations or replacements, these windows deliver excellent energy ratings, secure locking upgrades, and lasting thermal efficiency, making them a practical long-term investment for any home.

Contact

Real Homes. Real Results

James Hughes

3 months ago

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

3 months ago

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

4 months ago

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

4 months ago

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

4 months ago

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

4 months ago

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

4 months ago

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

4 months ago

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

5 months ago

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

1 year ago

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

1 year ago

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

1 year ago

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

1 year ago

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

1 year ago

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

1 year ago

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

1 year ago

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

1 year ago

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

2 years ago

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

2 years ago

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

Flush casement windows are available in a variety of styles to suit both traditional and contemporary properties. Contemporary flush casement windows feature slim frames and larger glazed areas for a clean, modern appearance, while heritage flush casement windows are designed to replicate traditional timber windows commonly found in period and conservation properties. Side-hung flush casement windows are the most common option, opening outward like a door for excellent ventilation, whereas top-hung flush casement windows are ideal for kitchens and bathrooms as they allow airflow even during light rain. French flush casement windows feature two opening sashes without a central mullion, creating wider openings and uninterrupted views. Fixed flush casement windows are also available for areas where ventilation is not required, helping maximise natural light and maintain a symmetrical design.

Installation times depend on the size of the project, the number of windows being replaced, and the condition of the existing openings. In most cases, standard residential installations are completed within one to two days. Every window is manufactured to precise made-to-measure specifications before installation, helping ensure a clean fit, minimal disruption, and a faster turnaround on site.

Yes. Flush casement windows are especially popular in period properties, cottages, Victorian homes, and conservation-style renovations because the sash sits level within the frame, replicating the appearance of traditional timber joinery. Modern uPVC and aluminium systems now achieve the same classic aesthetic while offering improved insulation, weather resistance, and security.

Yes. Modern flush casement windows are designed with advanced sealing systems, energy-efficient glazing, and insulated frames to help reduce heat loss. Double glazing comes as standard in most systems, while triple glazing is often available for even better thermal performance and noise reduction. Many flush sash systems achieve excellent energy ratings that help maintain a warmer, more comfortable home throughout the year.

Flush casement windows are available in a wide range of colours and finishes, including anthracite grey, agate grey, black ash, white, cream, and authentic woodgrain effects. Dual-colour options are also available, allowing homeowners to choose a different finish inside and outside the property for a more tailored appearance.

Yes. Many homeowners choose flush uPVC windows as a modern replacement for ageing timber frames. They recreate the traditional flush appearance of wood while removing common timber issues such as warping, swelling, rot, and ongoing repainting. The result is a low-maintenance alternative that still preserves the character of the property.

Flush casement windows are designed with modern home security in mind. Most systems include multi-point locking mechanisms, reinforced frames, secure hinges, and internally beaded glazing to help resist forced entry attempts. Because the sash closes tightly into the frame, the design also improves overall weather sealing and tamper resistance.

Yes. uPVC and aluminium flush casement windows are designed to withstand the UK climate with very little upkeep required. Unlike traditional timber frames, they do not need sanding, repainting, or regular sealing. A simple wipe-down with soapy water is usually enough to keep frames looking clean and performing properly for years.

Energy-efficient flush casement windows can help reduce heating costs by minimising draughts and improving insulation throughout the home. High-performance glazing, airtight seals, and insulated frames work together to retain indoor heat more effectively, helping homeowners rely less on central heating during colder months.

Yes. Secure Trade Windows offers both supply-only and full supply-and-fit services. Homeowners can choose professional installation by the in-house fitting team or order made-to-measure flush casement windows for independent installation projects.

The main difference is how the sash sits within the frame. A flush casement window closes level with the outer frame, creating a smooth, flat appearance. Standard casement windows usually feature an overlapping sash that protrudes slightly outward. Flush designs are often chosen for their cleaner, more traditional appearance and premium aesthetic.

Yes. Flush casement windows are available in both uPVC and aluminium frame options. uPVC is popular for its affordability, thermal efficiency, and timber-style appearance, while aluminium offers slimmer sightlines, greater structural strength, and a more contemporary architectural finish.

Yes. Double and triple glazed flush casement windows can significantly reduce outside noise levels, especially in busy residential areas or near main roads. Improved glazing technology and tighter seals help minimise sound transfer while also improving overall comfort and insulation inside the home.

Serving Leicester Since 2011

A-Rated Energy-Efficient Windows

Written Product & Workmanship Guarantees

Modern Energy Efficiency. Expertly Fitted.

Made-to-Measure Flush Casement Windows

The Flush Casement Advantage: Bringing Comfort and Character to Your Home

Why Choose Flush Casement Windows?

Get Your Free Quote

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

New Quote Form

Explore Our Flush Casement Options

Why Homeowners Choose Secure Trade Windows

Reliable Flush Casement Windows with a Full Supply & Fit Service

From Survey to Installation | A Complete Start-to-Finish Service

Our Process

Built for Performance, Designed for Elegance

Real Homes. Real Results

What types of flush casement windows are available?

How long does flush casement window installation take?

Are flush casement windows suitable for heritage homes?

Do flush casement windows improve energy efficiency?

What colour options are available?

Do you replace old timber windows with uPVC?

What security features do the windows include?

Are your windows low-maintenance?

Do new windows help reduce energy bills?

Do you offer supply only or supply & fit?

What is the difference between flush casement and standard casement windows?

Are flush casement windows available in aluminium as well as uPVC?

Can flush casement windows reduce outside noise?

Get Your Free Quote

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