Explore our modern aluminium windows, designed for elegance, durability, and security
Here to help
Enhance your home with Glevum's high-quality aluminium replacement windows, designed to complement both traditional and modern properties.
Our made-to-measure aluminium casement windows offer sleek design, outstanding durability, energy efficiency, and PAS 24-certified security. Choose from a wide selection of colours, finishes, and configurations, including tilt-and-turn, bay, and two-in-one options, to suit your style and space while ensuring safety.
With over 40 years of experience, Glevum is a trusted name in the industry. Our aluminium windows include a 10-year insurance-backed warranty, reflecting our commitment to quality. Our team is available to assist you with a free home visit and a no-obligation quote. Contact us today to begin transforming your home with Glevum.
- Modern aesthetics.
- 70mm frame maximises natural light in your home.
- Side or top hung opening.
- Secure (British security certification PAS 24).
- Excellent energy efficiency.
- Acoustic insulation to help reduce outside noise.
- Durable profile designed for long-lasting strength.
Unlimited colour range:
The full RAL colour chart is available in powder coating, metallic, textured, wood effect, over 100 anodised finishes, and even two-coloured finishes.
Alternative Configurations:
Frequently Asked Questions:
Looking for replacement aluminium casement windows in Cheltenham, Gloucester, Hereford or Monmouth? Then here’s why you can feel good about working with Glevum:
- Established in 1984, we offer extensive knowledge and experience.
- We are a leading FENSA-approved window and door installer based in Gloucestershire.
- 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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“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
“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