Upgrade your home with high-quality replacement windows available in many styles
Here to help
Thinking about upgrading your home with new replacement windows? At Glevum Windows, we offer stylish, secure, and energy-efficient uPVC and aluminium options. As a trusted FENSA-approved supplier in Gloucestershire, we’re dedicated to improving your property.
We know every home is different. That’s why we offer custom solutions to match your style and needs, whether you prefer classic sash windows or modern aluminium designs.
Replacing your old uPVC or aluminium windows can boost your home’s kerb appeal, security, and energy efficiency. Choose from many colours and styles to refresh your home’s look and enjoy a safer, low-maintenance, more comfortable space.
Further enhance your security with our Smart Windows. Enjoy real-time alerts on your smartphone and remote access, giving you greater control over your home security.
To begin, book a free home visit. Our team will guide you every step of the way.
Benefits of energy-efficient windows from Glevum:
Our windows offer many benefits to help reduce your energy bills while increasing your year-round comfort. These include:
- Reduce Energy Bills: Help reduce your heating and cooling costs with improved thermal performance.
- Increase Comfort: Modern windows help you regulate indoor temperatures by keeping the heat in during winter and out in summer.
- Environment: By better regulating the temperatures within your home, you can reduce your energy consumption and thus reduce your carbon footprint.
- Noise Reduction: Modern windows create a barrier which helps reduce outside noise.
- Enhanced Security: Modern windows feature advanced security features that add a vital layer of protection to any home. This can be further increased by investing in windows from the Glevum Smart range, which send meaningful alerts and notifications directly to your phone.
Choosing the right energy-efficient windows from the Glevum range:
Choosing the right windows can greatly impact your home's energy efficiency. Energy-efficient windows help reduce heating and cooling costs. They also enhance comfort by minimising draughts and cold spots.
Understanding which windows are most energy efficient is crucial. It involves considering factors like glazing, frame materials, and coatings. These elements work together to improve insulation and reduce energy loss.
Energy-efficient windows come in various types. Double-glazed and triple-glazed options are popular for their insulating properties. Low-E coatings and gas fills further enhance their performance.
Installation by established professionals such as Glevum Windows is key to maximising your energy savings potential. It ensures that your windows perform as intended, preventing air leaks. Upgrading to modern energy-efficient windows can be a smart investment for your home.
Read our online blog ‘Which windows are most energy efficient?’ to get a better understanding and help assist you in making an informed decision.
Security matters!
Here's why security matters:
- Protects family and belongings
- Reduces insurance premiums
- Increases property value
Investing in secure windows shows a commitment to safety. It provides assurance that your loved ones are protected. This peace of mind is invaluable.
Modern windows offer more than just aesthetic appeal. They are a crucial component in enhancing your home's security. With advanced features, these windows provide you with peace of mind.
Understanding the security features of modern windows is essential. It helps you make informed decisions.
Read our online blog ‘Top Security Features in Modern Windows’ to get a better understanding and help assist you in making an informed decision.
Replacement window installers near me:
Glevum Windows has been installing quality windows, doors, conservatories and conservatory roof upgrades in Gloucestershire, Herefordshire, Monmouthshire, Wiltshire, Worcestershire, and Bristol since 1984, and about half our work comes from returning customers and recommendations.
For a full breakdown of the postcodes we serve, please see our ‘Areas We Serve’ page.
Please browse our Customer Testimonials and Google Reviews.
Frequently Asked Questions:
Looking for replacement 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.
- Get Snug Windows & Doors Approved Installer.
- 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.
uPVC Casement Windows
A popular design is both attractive and durable. They provide security and energy efficiency. Plus, they come in many styles and finishes to improve your home's look.
Aluminium Casement Windows
Our custom-made aluminum windows work well for both old and new homes. They provide great heat and sound insulation.
uPVC Sliding Sash Windows
Combine the classic beauty of traditional windows with our sliding sash windows. They offer great energy efficiency, security, and sound performance.
Secondary Glazing
Our slimline secondary glazing is a secondary window that fits inside your current window frame. It is designed to be sleek and unobtrusive, so it won't change the look of your home's exterior.
Timber-Look Flush
Residence 9: an actual timber alternative flush uPVC window. Residence 7: flush external & internal windows, giving a modern appearance. Residence 2: an alternative aluminium flush window with a unique square interior.
Smart Windows
Innovative product range goes beyond standard windows and doors, with intelligent technology built in. Our Smart range of high-quality windows and doors gives you real-time alerts.
Finance Options
To help you take advantage of new double glazing now, we have teamed up with one of the UK’s leading financial services companies, so you’re in safe hands.
Appeal ULTRA® Smart Window Blinds
ULTRA® Smart Window Curtains Blinds are market leading, innovative shading solutions offered exclusively by Appeal.
Related Blog(s)
- How much can new windows save on energy bills?
- Which windows are most energy efficient?
- Should I replace all windows at once?
- Top Security Features in Modern Windows
- What Windows Add the Most Value to a House?
- How do I choose a local window company?
- Should I pay extra for Triple Glazing over Double Glazing?
- Are local window and door installers better than national?
- Glevum Smart Windows and Doors: Enhance Home Safety Now
- Benefits of Financing your windows and doors purchase
- Replacement Windows: Your Essential Guide
- 7 Signs You Need to Replace the Windows in Your Home.
- What factors will influence your windows and doors quote?
- Why cheapest may not always be best when it comes to doors and windows.
“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