Excellent, very professional & friendly service from this company. Gavin @ Duplus very helpful throughout & clearly explained the product & installation process. Our new lantern arrived on... See more
Company replied
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See what reviewers are saying
Installation of our two 4x2m roof lanterns went like clockwork this morning. In fact, we had them on their upstands by 0915 and fully installed by 1030!! They are clearly a quality product and th... See more
Company replied
Superb - Just had 2.5m x 1.25m Lantern light delivered exactly one month after order/payment.Fitted perfectly as described, looks great. Very good company with excellent fitting instructions etc al... See more
Company replied
We ordered a very large, sliding, electric sky light from DuPlus, and absolutely love it. The item itself is beautiful and works perfectly, and Gavin was brilliant keeping us informed throughout the... See more
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Company details
Written by the company
Duplus have over 60 years experience of designing and manufacturing high performance market leading innovative rooflights. Our products have been tested to the highest standards in terms of weather performance and security. Our Approved Document Part Q compliant rooflights meet the strict standards required to achieve Secure by Design accreditation. Also accredited with Dow Corning 'Quality Bond' certification and using state-of-the-art Dow Corning products, we can guarantee that our rooflights are manufactured to the highest standards in quality control, quality assurance and world class performance in structural silicone glazing. Many of our products have been used on numerous prestigious projects such as: Tate Modern and Savoy Hotel.
Duplus Architectural Systems Ltd - The Home of Truely Frameless Rooflights
Written by the company
- Over 60 years of manufacturing high quality, market leading rooflights
- We are Duplus Architectural Systems Ltd, a well established company with over 60 years experience that specialises in manufacturing frameless glass rooflights to suit both flat roof and sloping roof applications for the domestic market. Customer service is paramount to us and we pride ourselves on providing our customers with exemplary customer service and a high-quality product range. All our products are designed and manufactured by ourselves in Leicester. Our rooflights have been independently tested by the Building Research Establishment (BRE) and are fully compliant with British Standards and Building Regulations. Secure by Design (Part Q) accredited rooflight options available. All our products come with a 10-year warranty for peace of mind.
10 Year Product Guarantee*
Purchase with confidence
Duplus will warranty the product to be free from defects and workmanship for a period of 10 years* from the date of delivery. If there is a defect with the product covered by our warranty, Duplus will repair or if repair is not possible, replace the component or product free of charge. (*Electrical components covered by 1 year warranty)
Contact info
370 Melton Road, LE4 7SL, Leicester, United Kingdom
- 0116 2610 710
- sales@duplus.co.uk
- www.duplus.co.uk
5.0
Excellent
274 reviews
No history of asking for reviews
This company hasn't invited their customers, so reviews may not be representative
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The windows from Duplus are the best on…
The windows from Duplus are the best on the market. Also, Amar and the rest of the guys at Duplus are great.
16 January 2026
Unprompted review
Reply from Duplus Architectural Systems Ltd
Dear Max,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with our rooflights and the professional service provided by the team. We appreciate your feedback.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Fantastic Addition to Our Kitchen
Fantastic Addition to Our Kitchen – Highly Recommend!
We received excellent service from start to finish – from placing the order to the final delivery, everything was seamless and professional. The roof lantern itself is outstanding: beautifully made, solid, and clearly of high quality. It has completely transformed our kitchen by flooding it with natural light and creating a stunning focal point in the ceiling. We couldn’t be happier with how it looks and the difference it’s made to the room’s atmosphere. Highly recommend!
28 May 2025
Reply from Duplus Architectural Systems Ltd
Dear Rachel,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your frameless roof lantern and the professional service provided by the team. We appreciate your feedback.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Fantastic rooflights and customer care
We bought duplus rooflights back in 2022 and they’ve been fantastic.
Amar was very helpful in helping pick rooflights and even looked at our designs to give us the best options.
The customer care even after purchase has been outstanding, we had a small issue a while ago with our electric Rooflight and Amar helped us out and we were able to resolve it, this is nearly 3 years after buying which was amazing.
12 May 2025
Reply from Duplus Architectural Systems Ltd
Dear Jessica,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your rooflights and the professional service provided by the Amar and team. We value our customers and we do our utmost to ensure our customers receive the high quality service they deserve. We appreciate your feedback.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Great service from Duplus
Great service from Duplus!
Easy to install, reasonably priced and the glass looks great!!
24 April 2025
Reply from Duplus Architectural Systems Ltd
Dear Carl,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your ridge rooflight and the professional service provided by the team.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
One of the best customer service!
One of the best customer service, I've ever received ! Happy to answer all my queries and couldn't be more helpful when my project was delayed, meaning my ridge-light order pushed back.
Special thanks to Amar, super chuffed with our new ridge-light !
30 January 2025
Reply from Duplus Architectural Systems Ltd
Dear Amy,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your ridge rooflight and the professional service provided by Amar and the team.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Great product and great service
Fantastic product from Duplus who were able to supply a large single piece rooflight that was too big for our main window supplier to manufacture (a nationally recognised supplier of aluminium doors and windows). Duplus had a problem with the supply of the glass which nearly meant we didn't have delivery on the same day as the crane which would have cost more to rebook than the window itself. However they pulled out the stops and managed to get a replacement manufactured and delivered on time. The mark of a great company is always how they deal with problems that arise and Duplus were very professional at every step.
12 August 2024
Reply from Duplus Architectural Systems Ltd
Dear Andrew,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your rooflight and the professional service provided by the team.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Very good service and helpful
The customer service was very good and I will definitely go back to you guys again. Very happy with the product can’t go wrong and will recommend friends and family going forward.
15 February 2024
Reply from Duplus Architectural Systems Ltd
Dear Ketan,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your frameless low pitch lantern rooflights and the professional service provided by the team. We look forward to working with you again.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Great contact from the company
Great contact from the company. Amazing product and I would recommend using Duplus. We had a 1.5x3m roof lantern and it looks amazing.
15 February 2024
Reply from Duplus Architectural Systems Ltd
Dear Joel,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your frameless low pitch lantern rooflight and the professional service provided by the team.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Reply from Duplus Architectural Systems Ltd
Dear Kelly,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your Frameless low pitch lantern rooflight and the professional service provided by the team.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
12 sided roof light - no problem
We had a complicated roof light (12 sided!) yet the sales team were totally enthusiastic and helpful, and provided us with a competitive quote. They collaborated with our main contractor to provide a detailed solution for them to work to, and delivered to site ahead of schedule. Our roof light is beautiful, looks great quality, and installation when smoothly.
7 November 2023
Reply from Duplus Architectural Systems Ltd
Dear Phoebe,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your 12 sided rooflight and the professional service provided by the team. We always enjoy a challenge!....looks great. Thanks for the photos :-)
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Very helpful throughout and competitive.
17 July 2023
Reply from Duplus Architectural Systems Ltd
Dear Stephanie,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your rooflight and the professional service provided by the team.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Quality and Value Products
I was having my flat roof refurbished, and my roofing contractor recommended Duplus products for replacing my old roof lights.
Duplus also advertise and sell their products on eBay and they represented good value for money. I purchased two units which I collected in person from their Leicester based premises.
The entire process from initial contact with Duplus to payment and collection was straightforward and simple. My roof contractor had no problems installing the units (which look fantastic!) and are well designed and manufactured imho. The units have just been installed so I cannot comment on durability but they do come with a 10 year warranty...!
I would recommend Duplus products for quality and value.
24 August 2023
Reply from Duplus Architectural Systems Ltd
Dear Gerry,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your two Fixed rooflights and the professional service provided by the team.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Outstanding company.
Can't fault Duplus. They gave me a competitive quote, the rooflight came on time as promised, it was very well packaged and is of excellent quality. So pleased with it - it looks amazing. Thanks so much to Amar who was incredibly helpful to deal with.
30 May 2023
Reply from Duplus Architectural Systems Ltd
Dear Paul,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your Fixed rooflight and the professional service provided by Amar and the team.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Great product, great company
Great experience buying from these guys, very helpful and knowledgeable on products.
The whole process from start to finish was straight forward.
The product itself is great quality, easy to install and looks absolutely fantastic.
We Will definitely be using these guys again.
24 May 2023
Unprompted review
Reply from Duplus Architectural Systems Ltd
Dear Island Windows,
On behalf of the Duplus team, our sincere thanks and appreciation for your order and your 5 star review. We're delighted to hear that you're pleased with your frameless roof lantern and the professional service provided. We look forward to working with you again soon.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Electric sliding roof light
This company supplied me with an electric sliding rooflight absolute first-class service and most importantly after service there was an issue after it was fitted they drove all the way down from Leicester to fix the problem they did it quickly and were very professional I wouldn’t hesitate to recommend Mr West Kent
26 April 2023
Reply from Duplus Architectural Systems Ltd
Dear Mr West,
On behalf of Duplus, our sincere thanks and appreciation for your order and your 5 star review. Fortunately we have very few issues with our products but on the rare occasion when we do, we strive to resolve these promptly and professionally. We're therefore delighted to hear that you're pleased with your sliding rooflight and the service provided.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
After searching various suppliers for…
After searching various suppliers for our flat roof windows we placed our order with Duplus due at that time to cost, customer reviews and an excellent informative website. Having now received and fitted the windows I am extremely glad we chose Duplus. The product was extremely easy to install, I'm just a DIYer not a tradesman yet the install was very easy with all fixings and spacers provided. The quality of the windows is very good and the customer experience second to none with the most friendly and helpful team answering my questions and even phoning me back to ensure all is OK.
4 March 2023
Reply from Duplus Architectural Systems Ltd
Dear Peter,
On behalf of Duplus, our sincere thanks and appreciation for your 5 star review. We're delighted to hear that you're pleased with your fixed rooflight and the service provided.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Had a flat roof window from this place
Had a flat roof window from this place, packed so well and delivered on time, so happy with my new window
20 February 2023
Reply from Duplus Architectural Systems Ltd
Dear Jason,
On behalf of Duplus, our sincere thanks and appreciation for your 5 star review. We're delighted to hear that you're pleased with your fixed rooflight and the service provided.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
great communication
1 February 2023
Reply from Duplus Architectural Systems Ltd
Dear Chris,
On behalf of Duplus, our sincere thanks and appreciation for your 5 star review. We're delighted to hear that you're pleased with your rooflights and the service provided.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Flat Rooflights for domestic extension project
I had a good experience with Duplus. I had researched the type of product we needed which helped; they provided a range of flat Rooflight sizes and we needed two 3m x 1m flat Rooflights. The sales team were easy to deal with and knowledgable with regards fitting. The product was delivered efficiently in a timeframe communicated from the outset. We’ve just installed them and they look fabulous.
6 July 2022
Reply from Duplus Architectural Systems Ltd
Dear Chris,
On behalf of Duplus, our sincere thanks and appreciation for your 5 star review. We're delighted to hear that you're pleased with your fixed rooflights and the service provided throughout. May we also take this opportunity to thank you for your superb photographs of the rooflights. We have now added these to the fixed rooflight page of our website.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
Brilliant product and excellent service
We ordered a very large, sliding, electric sky light from DuPlus, and absolutely love it. The item itself is beautiful and works perfectly, and Gavin was brilliant keeping us informed throughout the order process. He even helped us troubleshoot possible access solutions on the delivery day, when we realised we wouldn't be able to fit it up our communal stairwell to the top floor.
A+++!
20 June 2022
Reply from Duplus Architectural Systems Ltd
Dear Jason,
On behalf of Duplus, our sincere thanks and appreciation for your 5 star review. We're delighted to hear that you're pleased with your electric sliding rooflight and the service provided throughout. May we also thank you for your superb photographs of the rooflight. We have added these to our website.
Many thanks and kind regards,
Duplus Architectural Systems Ltd
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