Window and Door Glazing Options
Here to help
Think glazing first, not last. Windows do more than just look nice; they affect your comfort, energy costs, and even your safety.
There’s no single solution when it comes to glazing. You need to consider heat loss, solar gain, noise, condensation, and building regulations. Whether you choose double or triple glazing, energy-efficient coatings, gas-filled gaps, or solar control glass, the right option depends on your home’s orientation, local climate, and budget.
If you’re getting new windows, ask yourself what problems you want the glazing to solve. Is it heat loss, overheating, or noise? Think about which way the room faces and the long-term value, not just the initial cost.
For over 40 years, Glevum Windows has installed quality windows, doors, and conservatories. Our experience means we can help you make the right choice.
Double Glazing
Double-glazed windows are popular for their excellent insulation properties. Two panes of glass separated by a spacer effectively reduce heat transfer. Ideal for moderate climates seeking a balance between insulation and comfort.
Triple Glazing
Triple-glazed windows take insulation a step further with an extra glass layer. This additional pane enhances thermal efficiency, making it suitable for cold climates. While more expensive, the insulation they provide is unmatched.
Solar Control Glass
Solar control glass is made to reduce the amount of solar energy entering a room. It can be especially useful for large, glazed areas, bifold doors, sliding doors and rooms that become too warm on sunny afternoons.
Toughened Glass
Glass is naturally fragile, but the toughening process changes its internal structure, making it much stronger. Toughened glass is safer because, if it breaks, it shatters into small pieces with blunt edges.
Laminated Glass
Laminated glass is made by bonding two layers of glass together with a special layer in between. This layer helps hold the glass together, even if it breaks, making it strong and safe.
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.
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.