Super strong and thermally efficient, Flat Roof Home Extensions
Here to help
Looking to transform your home with a sleek, modern extension? At Glevum, we believe in the power of personalisation. Discover the benefits of the Ultraframe super-strong, thermally efficient flat roof home extensions, available in both contemporary and traditional styles.
Whether you prefer the clean lines of Ultrasky Skylights, which flood your space with natural light, or the timeless elegance of Ultrasky Lanterns, which create a stunning orangery, we have the perfect solution for you. The possibilities are endless, and we're here to help you bring your vision to life.
The Ultraframe Flat Roof system is designed for strength and efficiency, supporting spans of up to 5.6m without additional support and is engineered to withstand the most severe weather conditions. Plus, with 25% fewer bars in Ultrasky Lanterns, you'll enjoy a brighter, warmer space with no cold spots—ideal for kitchens and living areas. Ready to upgrade your home? Don't wait any longer. Contact us today for a free home visit. Let's make your dream extension a reality!
What are the benefits of Ultraframe flat roof home extensions?
Ultraframe flat roof home extensions are super-strong, thermally efficient, capable of spanning up to 5.6 meters without additional support, and designed to withstand severe weather, making them a durable, high-quality addition to your home.
Can I choose between modern and traditional styles for my flat roof extension?
Yes, you can select from contemporary styles like Ultrasky Skylights or traditional designs such as Ultrasky Lanterns, allowing you to personalise your extension to match your home's aesthetic.
Why should I trust Glevum for my flat roof extension project?
Glevum has been in business since 1984, is FENSA-approved, a leading Ultraframe supplier, a Kubu Pro Installer, and offers a 10-year GGFi guarantee on windows and doors, ensuring professional service and top-quality products.
How does the Ultraframe flat roof system improve my living space?
The system supports large spans, provides excellent thermal efficiency, and features fewer bars in lantern styles to minimise cold spots, resulting in a brighter, warmer, and more comfortable space.
How can I get started with my flat roof extension project with Glevum?
You can book a free home visit or request an instant quote through their website or contact Glevum directly by phone or email to discuss your project and begin transforming your home.
Looking for a flat roof home extension in Cheltenham, Gloucester, Hereford or Monmouth? Then here’s why you can feel good about working with Glevum:
- We have been in business since 1984 and bring a wealth of knowledge and experience.
- We are a leading FENSA-approved window and door installer based in Gloucestershire.
- We are a leading supplier of Ultraframe. As part of their Ultra Installer Scheme, we are committed to great products and excellent service. You can trust us to deliver top-quality installation for your home.
- We are a Kubu Pro Installer.
- All our windows and doors include a 10-year GGFi-backed guarantee.
- Our dedicated Service Department is here to support you.
- More than 45,000 customers enjoy the security and quality of our windows and doors.
- About half of our work comes from returning customers and recommendations.
- We offer a range of Finance Options. Just ask for details during your free home visit or quote.
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J Holyhead (Gloucestershire)
March 2026
“Very helpful and reassuring. My window and door were fitted by 2 very nice men and its prefect, we are so pleased, thank you so much.”
K Smith (Gloucestershire)
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“We have used Glevum many times over the last 25 years and have never been disappointed with the quality of workmanship, timely service and friendly approachable people.”
M Tattersall (Gloucestershire)
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M Tomlin (Gloucestershire)
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"Glevum were very professional throughout the purchase and installation and I am happy with the finished result. Installation team were courteous, neat and tidy throughout the process."
R Elliott (Gloucestershire)
November 2025
“Friendly, helpful staff from sales person to fitter, excellent service all round.”
J Holyhead (Gloucestershire)
March 2026
“Very helpful and reassuring. My window and door were fitted by 2 very nice men and its prefect, we are so pleased, thank you so much.”
K Smith (Gloucestershire)
February 2026
“Very professional service from the quote to the fitting. Very pleased.”
J Ochiltree (Gloucestershire)
January 2026
“We have used Glevum many times over the last 25 years and have never been disappointed with the quality of workmanship, timely service and friendly approachable people.”
M Tattersall (Gloucestershire)
January 2026
"Excellent service and workmanship. Highly recommend."
M Tomlin (Gloucestershire)
November 2025
"Glevum were very professional throughout the purchase and installation and I am happy with the finished result. Installation team were courteous, neat and tidy throughout the process."
R Elliott (Gloucestershire)
November 2025