Fixed Unit Secondary Glazing
Here to help
Our most simple secondary double-glazing product is typically used when the area for fixing into is minimal. Once installed, the glazed panel cannot be removed.
A fixed secondary glazed window is an independent window permanently fitted on the inside of an existing door or window. It’s ideal for when space is limited or when minimal access to the primary window is required. For this reason, our fixed units are incredibly popular in large-scale commercial projects.
Turn-button releases are optional, enabling removal for cleaning and maintenance if required. Available in several styles and single— or double-glazed aluminium profiles, there are several configurations to choose from.
Specification:
Sporting the same slim, unobtrusive aluminium profile, these units are suitable for shaped applications such as arches. It is also the most economical option to secondary glaze existing windows.
Performance:
Despite its low price, fixed secondary glazing still offers all the advantages synonymous with secondary glazing, namely 80% noise reduction, 65% extra thermal insulation, and enhanced security. Once the insert panel is attached to the existing pane, it can be permanently fixed in position on a window or door, then trimmed and sealed along all edges.
The product is unsuitable for fire escape locations as it would not comply with building regulations.
- Noise, cold, security, and condensation issues are managed and controlled.
- Multiple design options: historical, contemporary, or unusual designs, 200 frame colours, and lift-out panels.
- Multiple glazing options.
- 10 Year Guarantee for all frames and glazing.
Related Blog(s)
We are a proud supplier of Granada Secondary Glazing (The UK's largest bespoke secondary glazing manufacturer).
“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