Give your home a fresh look with our quality replacement windows, available in a variety of styles
Here to help
Are you considering new windows for your home? You’ve come to the right place. At Glevum Windows, we provide high-quality uPVC and aluminium windows that look great, keep your home secure, and help save energy. As a trusted FENSA-approved installer, we’re committed to making your property better.
Every home has its own character. We offer custom solutions to fit your style and needs, whether you like classic sash windows or modern aluminium designs.
Upgrading your old uPVC or aluminium windows can make your home look better, feel safer, and save energy. Pick from a range of colours and styles to give your home a fresh look and enjoy a safer, easier-to-care-for, and more comfortable space.
You can make your home even more secure with our Smart Windows. Get real-time alerts on your phone and control your security from anywhere.
Start by booking a free home visit. Our team is here to help you at every stage.
Benefits of energy-efficient windows from Glevum:
Our windows can help lower your energy bills and make your home more comfortable all year. Here are some of the benefits:
- Save on energy bills: Our windows improve insulation, so you spend less on heating and cooling.
- Enjoy more comfort: Modern windows help keep your home warm in winter and cool in summer.
- Help the environment: Better temperature control means you use less energy and lower your carbon footprint.
- Reduce noise: Modern windows help block out unwanted sounds from outside.
- Feel safer at home: Modern windows come with advanced security features for extra protection. If you choose the Glevum Smart range, you can also get alerts and notifications sent straight to your phone.
Choosing the right energy-efficient windows from the Glevum range:
The windows you choose can make a big difference in your home's energy efficiency. Energy-efficient windows lower heating and cooling costs and make your home more comfortable by reducing draughts and cold spots.
It's important to know which windows are most energy efficient. Look at things like glazing, frame materials, and coatings. These features help keep heat in and reduce energy loss.
There are several types of energy-efficient windows. Double-glazed and triple-glazed windows are popular because they insulate well. Low-E coatings and gas fills can make them even more effective.
Having your windows installed by trusted professionals like Glevum Windows helps you get the most energy savings. Proper installation keeps your windows working well and stops air leaks. Upgrading to new energy-efficient windows is a smart choice 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!
There are several reasons why security matters.
- It helps protect your family and your belongings.
- Good security can also help lower your insurance costs.
- A secure home may even increase your property's value.
Choosing secure windows shows you care about safety. It gives you confidence that your loved ones are protected, and that peace of mind is priceless.
Modern windows do more than look good. They play an important role in keeping your home safe. Thanks to new features, these windows help you feel more secure.
Learning about the security features of modern windows can help you make better choices for your home.
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, Google and Trustpilot reviews.
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.
Glazing Options
Think glazing first, not last. Windows do more than just look nice; they affect your comfort, energy bills, and even your safety.
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.
What makes Glevum Windows a trustworthy choice for your replacement windows?
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.
- 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.
Related Blog(s)
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