Improve your heritage property with discreet secondary glazing solutions
Here to help
Upgrade your windows with Glevum’s secondary glazing, designed to fit inside your existing frames. Improve thermal insulation, noise reduction, and security while preserving your property’s historic character.
Our secondary glazing is available as horizontal, vertical, hinged, lift-out, or fixed units. We offer tailored solutions for all properties, including listed and heritage buildings.
Reduce noise by up to 80%, decrease heat loss by 65%, and improve security with discreet panels that integrate seamlessly with your home’s design. Book a free home visit to see how secondary glazing can enhance your comfort and security.
What is Secondary Glazing?
Benefits of Secondary Glazing:
Noise Reduction: Secondary glazing offers the highest level of noise reduction, outperforming other glass solutions. Glevum’s secondary glazing is manufactured with advanced machinery to ensure a tightly sealed frame, reducing noise by up to 80% (50dB).
Energy Efficiency: Secondary glazing adds an extra barrier to reduce heat loss. The gap between the existing window and the secondary unit acts as an insulator, reducing heat loss by up to 65%.
Enhanced Security: Secondary glazing serves as an effective deterrent to intruders. It is difficult to open from the outside, providing an additional barrier against forced entry. The frames are made from durable, high-quality aluminium and are securely fixed.
Condensation Control: Secondary glazing helps control condensation by providing a complete internal seal that balances ventilation within the window cavities. This prevents the inner glass from becoming too cold and reduces condensation.
Seamless Aesthetics: Glevum’s secondary glazing features a sleek, modern design that delivers acoustic, thermal, and security benefits without compromising style.
What is secondary glazing, and how does it benefit heritage properties?
Secondary glazing is a slim, discreet aluminium panel installed inside your existing window, nearly invisible when correctly fitted. It enhances thermal insulation, noise reduction, and security without altering the building's original style, making it ideal for heritage properties.
How effective is secondary glazing at reducing noise and heat loss?
Secondary glazing can reduce noise levels by up to 80% and decrease heat loss by approximately 65%, significantly improving comfort and energy efficiency in your home.
Can secondary glazing be installed on any type of window or property?
Yes, secondary glazing is versatile and can be tailored to all property types, including listed and heritage buildings, with options like horizontal sliding, vertical sliding, hinged, lift-out, and fixed units.
Will secondary glazing affect the appearance of my property's character?
No, Glevum's secondary glazing is designed to blend seamlessly, maintaining your property's aesthetic appeal while providing superior thermal, acoustic, and security benefits.
How do I choose the right secondary glazing solution for my property?
Consulting with specialists like Glevum ensures you receive a tailored solution suited to your property's style, whether it's modern, traditional, listed, or heritage, for optimal performance and appearance.
Horizontal Sliding
Arguably, it is the most popular Secondary Glazing option. Horizontal sliding secondary glazing units are slim, versatile, and easily accessed for cleaning and ventilation. The perfect fit for all property types and styles,
Vertical Sliding
This secondary glazing option is perfect for heritage properties and modern buildings alike. Vertical sliders have a tilt option that enables both panels to pivot inwards for easy access and cleaning individually.
Hinged Casement
Hinged windows can be installed with any style of original window from casement to traditional box sash. Our secondary glazed panels open into the room with hinges positioned on whichever side you wish.
Lift Out
The lift-out solution is the most ‘removable’ product in the entire range. It is ideal for listed and heritage properties where installing double glazing is not a viable option. It is also ideal for windows that require only occasional access, with the unit capable of being easily lifted out when required.
Fixed Unit
Fixed secondary glazing features an independent unit that is neatly fitted on the interior side of the primary window. As an effective alternative to a complete window replacement, the fixed units provide significant noise reduction, thermal performance, and enhanced security.
Bespoke and Arched
For every unique window, there is a secondary glazing solution. Our decades of experience mean we fit every window precisely to your spec. There is virtually no limit to the type of property that can be improved with our broad range of available solutions.
Related Blog(s)
We are a proud supplier of Granada Secondary Glazing (The UK's largest bespoke secondary glazing manufacturer).
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 (Gloucester)
Very good, excellent communication, highly recommended.
M. Thomas (Lydney)
A truly professional company, who respected our home, were courteous and helpful when dealing with us.
M. Wear (Gloucester)
Every member of staff we have dealt with provided excellent customer service they were friendly and professional. We are happy to recommend the company.
S. Groves (Swindon)
Excellent service from start to finish. Well explained on the initial home visit and questions answered fully. Easy to make payments and such a professional and pleasant experience. I would recommend to others and would definitely use the company again.
B Rollins (Gloucester)
Glevum Windows and doors are of excellent quality and the fitters, Matt and Dean were both quick, efficient and tidy workers. We found them both friendly and polite. We would not hesitate to recommend the Company and the service they provided.
N Harris (Pershore)
A very personal service; I felt valued as a customer and they listened to what I wanted. Excellent quality of product and service. I decided not to go with a larger well-known brand as they did not provide the same personal service in the quotation stage.
J. Miller (Symonds Yat)
Excellent everyone was professional and yet friendly. I felt all were giving me good service and I felt a valued customer.
D. Morse (Lydney)
Always helpful and courteous whichever department one is speaking with.
Fitters are skilled and careful. Products are not the cheapest on the market but they are of the best quality and extremely good value for money.
R. Savage (Worcester)
Excellent service from start to finish, we had secondary Glazing fitted into our dental practice. Glevum attended when they said they would, completed the job with minimum disturbance to the daily running of the practice, and left their work place clean and tidy. The glazing has made such a difference, staff are much warmer and the radiators have been turned to low.
H. Pugh (Gloucester)
Glevum were prompt in quoting for the work. The order was placed and doors and windows far more quickly than other companies were able. The fitting was completed to a high standard. I'm very happy with the work and product!!
K. Smit (Bristol)
So happy with installation, can really feel the difference in room temperature. Fitters were excellent, very pleasant and left everywhere clean and tidy. Very professional job. Would certainly recommend. Thankyou Glevum.
L. Hollis (Ross-on-Wye)
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 (Gloucester)
Very good, excellent communication, highly recommended.
M. Thomas (Lydney)
A truly professional company, who respected our home, were courteous and helpful when dealing with us.
M. Wear (Gloucester)
Excellent service from start to finish. Well explained on the initial home visit and questions answered fully. Easy to make payments and such a professional and pleasant experience. I would recommend to others and would definitely use the company again.
B Rollins (Gloucester)
Every member of staff we have dealt with provided excellent customer service they were friendly and professional. We are happy to recommend the company.
S. Groves (Swindon)
Glevum Windows and doors are of excellent quality and the fitters, Matt and Dean were both quick, efficient and tidy workers. We found them both friendly and polite. We would not hesitate to recommend the Company and the service they provided.
N Harris (Pershore)
A very personal service; I felt valued as a customer and they listened to what I wanted. Excellent quality of product and service. I decided not to go with a larger well-known brand as they did not provide the same personal service in the quotation stage.
J. Miller (Symonds Yat)
Excellent everyone was professional and yet friendly. I felt all were giving me good service and I felt a valued customer.
D. Morse (Lydney)
Always helpful and courteous whichever department one is speaking with.
Fitters are skilled and careful. Products are not the cheapest on the market but they are of the best quality and extremely good value for money.
R. Savage (Worcester)
Excellent service from start to finish, we had secondary Glazing fitted into our dental practice. Glevum attended when they said they would, completed the job with minimum disturbance to the daily running of the practice, and left their work place clean and tidy. The glazing has made such a difference, staff are much warmer and the radiators have been turned to low.
H. Pugh (Gloucester)
Glevum were prompt in quoting for the work. The order was placed and doors and windows far more quickly than other companies were able. The fitting was completed to a high standard. I'm very happy with the work and product!!
K. Smit (Bristol)
So happy with installation, can really feel the difference in room temperature. Fitters were excellent, very pleasant and left everywhere clean and tidy. Very professional job. Would certainly recommend. Thankyou Glevum.
L. Hollis (Ross-on-Wye)