Slimline Aluminium and Louvre Windows

This striking contemporary home in St. Albans, Hertfordshire required something a little different. At LB Window Systems, we were asked not only to replace the original timber windows and doors but also to help realise a unique customer request: sourcing and installing aluminium louvre windows as part of the project.

Modern Aluminium Windows, Doors and Louvres

The house in Ayot St Laurence features a bold architectural design with angled walls, exposed concrete and grey slate cladding. Working closely with the client, we supplied and installed a full suite of aluminium glazing products, including:

• Slimline aluminium windows with large top-hung openings
• A new front door with glazed side panel and full-height toplight
• A two-panel sliding door with integrated trickle ventilation
• Bespoke aluminium louvre windows sourced from Europe

All windows and doors were finished in a dark grey powder-coated frame to complement the building’s modern style and contrast with the rendered and slate façades.

Replacing Top-Swing Reversible Timber Windows

Many of the original windows on this property were dated top-swing reversible units , common in timber and old metal windows. Whilst still available in aluminium, pivot windows are used more commercially. You can also find them in a restricted form in high level windows on apartment buildings.

Instead of replacement with modern pivot windows, the soluration was a top hung casement. One of the advantages of aluminium casement windows today over uPVC, is that it is capable of larger opening sizes. Our slimline aluminium windows provided the ideal replacement, offering:

• Cleaner lines and minimal framing
• Improved energy performance
• Greater natural light
• Secure, top-hung openers for upstairs bedrooms and living areas

Bespoke Aluminium Louvre Window Integration

The most technically interesting part of this St Albans house project involved the client’s request for aluminium louvre windows — a glazing style more commonly found in European homes, particularly in warmer climates where airflow is key.

Louvre windows use individual glass blades that open in unison to allow for controlled ventilation. Unlike standard openers, louvres let air circulate while maintaining a degree of security, as they don’t expose a full window opening.

Because suitable products are not commonly available in the UK, we sourced a European aluminium louvre window system and integrated it into one of the long horizontal windows in the home. The result is a fully functional, modern aluminium louvre window with:
• High airflow potential
• Weather-sealed blade mechanism
• Contemporary flush frame
• Manual crank handle operation

This feature makes a real difference to ventilation in that part of the house and delivers a unique design detail.

Entrance Door and Sliding Door Design

To match the new windows, the front door features a minimalist single sash with a glazed flag side window and a full-height fixed toplight. The aluminium sliding door to the rear of the home uses a two-panel Origin system — a trusted, smooth-running design ideal for modern renovations. We also ensured full compliance with ventilation requirements by including trickle vents to the head of the sliding frame.

New Glazed Aluminium Front Door

In key locations, such as the font door, this comprises an open out resential door, with flag side panes and full width fixed toplight.

When fitting such a door combination, early generation aluminium windows were avoided in this style, because of the risk of water ingress at the full width toplight.

Today, thanks to modern insulated aluminium, clever design and extensive sealing, it is possible to recreate the designs mainly done with timber doors, with latest generation aluminium.

Origin Silding Doors

At the rear of the property is a new patio door from the Origin range. Designed in a two-panel design it comes with a double track, enabling either left or right hand leaf to slide.

With contemporary bar handles, in a matching grey finish and Doors glazed with toughened safety glass, having a soft-coat low-emissivity coating, warm edge spacer bars and argon gas fill. Safe, secure, smooth sliding and always reliable are hallmarks of Origin patio sliding doors.

Bespoke Windows and Doors by LB Window Systems

At LB Window Systems, we pride ourselves on more than just supplying standard aluminium windows and doors. Every installation is tailored to suit the property and the client’s design brief.

In this case, we sourced and integrated a niche product, rarely available in the UK today. Modern aluminium louvre windows, fitted into a complex and architecturally interesting home.

PROJECT DETAILS

Project: Replacement Windows to a Modern House
Products Used: Slimline casement windows. Residential Glazed Front Doors. Bespoke Auminium Louvre inset windows.
Colour: Grey RAL 7016 Matt

Paul Hutton

16:48 03 Feb 26

From day one Gemma and Leigh were superb! Leigh really knows his product and his knowledge and awareness of what we wanted showed from the initial quoting point right the way through to installation and after too. Gemma provides excellent customer service, a great point of contact and kept is the loop throughout on timings. Delighted with the quality of the windows, doors and skylight we had installed and the service throughout. LB Window Systems are a local company proving that trusting and supporting local businesses is best way to do things! Keep up the great work guys!

Izzy Bly

12:37 31 Jan 26

Great service from start to finish. Communicated with us throughout the process, and the final result was fantastic! Would highly recommend.

Shaylene Perry

09:06 26 Jan 26

We had an Origin garage door installed by LB Window System Ltd and couldn’t be happier with the experience. The team were professional, friendly, and communicated clearly throughout the process. When an unexpected issue arose on the day, they went out of their way to make sure the door was fitted properly, which we were extremely grateful for. Excellent service from start to finish — we would highly recommend LB Window System Ltd to anyone.

Rich Coles

22:09 21 Jan 26

Delighted with LB Window Systems from start to finish, very highly recommended. Excellent comunication from the start, very proactive and very personable. We only needed one window installing to match others in our property, but this meant cutting a hole and removing a chimney breast, so much more of a contruction job than a window, and we half expected this to be too small a job for them. Couldn’t be more delighted with the end result, and Mark Taplin, who did the building work was also fantastic. I immediately felt at ease meeting Leigh and Mark and knew we had very trustworthy people we could rely upon to do a great job – and we weren’t disappointed. And Gemma all along excellently managing the communication. Thank you!

Derek Langston

09:59 05 Nov 25

Excellent service good door installed in good time would recommend

Gavin Bowen

18:07 13 Oct 25

Leigh, Gemma and the team did a fantastic job replacing 8 of our windows. Great communications all the way through, turned up when expected, super efficient work and above all they are a really nice and friendly team. Would definitely recommend.

b Mcg

12:33 07 Oct 25

Fantastic quality and the service was excellent. Would definitely recommend.

Alexandra Bruzas

17:05 14 Sep 25

Excellent service from start to finish for fitting bifolds. Good communication, polite and courteous. Installation trickier than initially thought but were able to resolve as well as meet timescale and budget.

Liz Briggs

12:50 11 Sep 25

Fantastic work and great people to deal with, helpful and upfront about the whole process

Kristina Hedley

07:23 20 Aug 24

Beautiful windows, brilliant service and all at a fair price. Leigh & Gemma were fantastic from start to finish. Living in an old property we were skeptical about moving away from wood but the upkeep was too much, so decided to move to an alternative. Leigh knew exactly what product to use and install was perfect. Clean & tidy and finished to a very high standard, we think you’ll agree that they look sunning and it’s very difficult to tell that they arnt wood!

stephen griffiths

17:33 14 Aug 22

Hi had really great service from LB window systems . I had been recommended by my neighbour who had used them over a number of years. I had 12 windows back and front doors fitted and I must say had a 100% positive experience. Leigh, Gemma and everyone I had contact with over the order and fitment process where friendly professional and kept me informed every step of the way. I did have a slight problem with one window mechanism which resulted in another visit. again this was dealt with swiftly and with no drama. I have already recommended LB to friends and family

Sarah Large

08:39 30 Jul 22

Leigh and his team replaced our front and back door, and installed a bifold and full length window. The workmanship is great, the products are good quality and they were friendly, punctual and tidy. We wouldn’t hesitate to recommend them.

Sam Mardle

11:25 21 Jul 22

Great service from start to finish – had all windows replaced, as well as bifold doors and a new front door installed. All look fantastic.

Lewis 621

11:19 22 Jun 22

Recently had all the windows on our house done by LB Window systems and the difference is just incredible! The house looks so much better, service provided by Leigh, Gemma and the team was brilliant, from quotes to the work being carried out in a clean and professional manner. Can’t recommend this company enough, thank you again!

Nicola Shepherd

19:14 28 Apr 22

This is the second time we have used LB Window Systems, having used them last year to replace windows and door on a garden office and been very pleased with the results. This time it was to replace the front door, windows to the front of the house and patio doors at the rear. Leigh and Gemma were very helpful and responsive from the outset, pulling together numerous iterations on quotes to help us get exactly what we wanted within our budget. Five star from start to finish including the results and service. We’ll be using them again when we finally get around to doing the rest of the windows and cannot recommend them highly enough.

S Parky

18:27 17 Mar 22

Absolutely excellent! If I could give a ten star review, I would! (To anyone with any experience of builders/construction etc you’ll appreciate what a rarity that is!!) Leigh has just replaced all the windows on the front of our house and fitted a new front door and we couldn’t be happier. Gemma was fantastic at keeping us up to date on the progress of the job, from organising the initial quote to delivery & installation. Leigh was absolutely brilliant, a proper grafter! Arrived on time every day he was with us and got all of our windows and doors fitted PERFECTLY. His work is so neat we have virtually no making good to do at all. Everything looks fantastic, the impact of outside noise and warmth of our home was instantly improved! The price quoted was very fair and competitive, we would not hesitate to recommend LB window Systems Ltd to anyone. Brilliant. Thank you Leigh & Gemma!

C G

18:18 20 Mar 21

Service was brilliant; Leigh turned up when expected for the quote and Gemma was excellent at providing information throughout, from quote through to updates on delivery and installation. In the day, the installation went brilliantly, even though on of the windows was more difficult due to the previous window being fitted badly. Leigh talked me through everything they were doing and even repaired all the blown plaster caused by the previous window. New windows look fabulous and I’m so so pleased with noise reduction of the road – glad I took Leigh’s advice!

Rebecca Cullum

12:36 03 Nov 20

I would highly recommend Leigh and his team. They recently replaced all of my windows and doors and installed bi-folds at the back of my house. They provided an excellent service with great communication. They were on time, unbelievably efficient and totally professional.

The workmanship, attention to detail and overall finish provided by Leigh and the whole team is absolutely first in class. I could not be any happier with the overall experience as well as the end result. I would have no qualms whatsoever in recommending LB Window Systems, in fact if you can manage to secure them to install for you, you are incredibly lucky!

Monday	08:30 – 18:00
Tuesday	08:30 – 18:00
Wednesday	08:30 – 18:00
Thursday	08:30 – 18:00
Friday	08:30 – 16:00
Saturday	09:00 – 15:00