Transform your space with an Ultrasky Lantern conservatory roof and enjoy wide-angle glass that fills your room with natural light
Here to help
Want more natural light and style in your home? The Ultrasky Lantern Roof brightens your space with wide glass angles and slim bars, giving you clear, open views.
This new roof makes your home look better and helps you save on energy bills. If you want a brighter kitchen, a stylish bedroom, or a modern living space, Ultrasky’s sleek design fits your plans.
This roof looks great on any home and can even increase its value. Ultrasky Lantern Roofs work well for large spaces, letting in lots of natural light. Each one comes with a 10-year warranty for extra peace of mind. If you want to improve your home, contact us for a free home visit and see how an Ultrasky roof can help you create your ideal space.
What makes Glevum Windows a trustworthy choice for your Ultrasky lantern roof?
Out of 640 customers who took our Customer Survey, 92% said they would recommend Glevum Windows to others!
- We have been in business since 1984, bringing years of knowledge and experience to every project.
- We are a trusted FENSA-approved window and door installer based in Gloucestershire.
- As an Ultraframe supplier and member of the Ultra Installer Scheme, we are committed to providing high-quality products and service. You can count on us for an excellent installation in your home.
- We are an approved installer for Get Snug Windows & Doors.
- We are also a Kubu Pro Installer.
- All our windows and doors come with a 10-year INSTALLsure (formerly the GGFi) insurance-backed guarantee.
- If you need planning permission or building regulations, we will take care of it on your behalf.
- Our dedicated Service Department is always here to help you.
- Over 45,000 customers trust the security and quality of our windows and doors.
- Nearly half of our work comes from returning customers and referrals.
- Rated 'Excellent' on Trustpilot.
- We offer a range of Finance Options. Feel free to ask about them during your free home visit.
“Excellent. Turn key solution and Glevum took away my hassle, particularly that the location was not the easiest. Very good communication at all stages.”
M Julian-Jones (Newport)
September 2026
“Professional, timely, friendly and efficient.”
J Hardwick (Stonehouse)
August 2026
“A pleasure, as always. From start to finish, everything ran smoothly.”
G Delaney (Cheltenham)
July 2026
“Really lovely company. Have used in a previous home and would use again.”
S Price (Cheltenham)
June 2026
“Everyone we encountered from the company was very helpful, knowledgeable and friendly.”
G Day (Gloucester)
May 2026
“Really good, great throughout and great finished product.”
H Jenkins (Lydney)
April 2026
“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
“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. Turn key solution and Glevum took away my hassle, particularly that the location was not the easiest. Very good communication at all stages.”
M Julian-Jones (Newport)
September 2026
“Professional, timely, friendly and efficient.”
J Hardwick (Stonehouse)
August 2026
“A pleasure, as always. From start to finish, everything ran smoothly.”
G Delaney (Cheltenham)
July 2026
“Really lovely company. Have used in a previous home and would use again.”
S Price (Cheltenham)
June 2026
“Everyone we encountered from the company was very helpful, knowledgeable and friendly.”
G Day (Gloucester)
May 2026
“Really good, great throughout and great finished product.”
H Jenkins (Lydney)
April 2026
“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
“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
Areas We Serve:
Glevum Windows is a trusted home improvement specialist, helping homeowners throughout Gloucestershire, Herefordshire, Worcestershire and Monmouthshire.
We’re one of the largest, leading independent double glazing companies based in Gloucestershire. While our core area is Gloucestershire, we are ideally located to serve home improvement needs in Cheltenham, Gloucester, Tewkesbury, Stroud, Cirencester, Hereford, Ross-on-Wye, and Monmouth, among others.