Secondary Glazing; what is it?
Secondary glazing is a fully independent internal window, fitted on the room side of the existing primary window. This provides significant noise reduction, improved thermal performance and enhanced security.
Selectaglaze Product Range
The Selectaglaze range of secondary glazing is the result of years of research and development. Our products are carefully designed and fully tested to provide effective noise insulation, thermal and draught insulation and enhanced security. The comprehensive range of secondary glazing allows sympathetic treatment of almost any style of window.
Our Sectors
Selectaglaze has extensive experience of the individual needs of the following sectors.
Churches
Education
Healthcare
Housing
Hotels & leisure
Museums & libraries
Office
Home owner
Heritage - Listed buildings and secondary glazing









Secondary Glazing for Heritage Buildings
We live on a small island with limited space for our buildings and have to work with planning policies that restricts the Greenfield land available for new construction. Buildings and their sites are therefore continually adapted to suit the needs of the times but there are clear guidelines on both respecting and retaining those parts of the built environment that define our heritage.
Both heritage bodies and conservation professionals recognise that historic buildings have to adapt in order to be attractive for modern usage. Most are thermally inefficient and draughty with poor acoustic performance all of which have to be addressed and can be helped through the addition of secondary glazing. Further details about secondary glazing for Listed BuildingsSecondary glazing
- Retaining and adapting heritage buildingsGain valuable CPD points with us
The general CPD by Selectaglaze, provides a clear understanding of the benefits of using secondary glazing. It covers:- Applications including Listed buildings
- Control of unwanted noise
- Thermal upgrade and impact of Part L
- Design approach, the specification process
- Standards and regulations
- Window protection through secondary glazing systems
- Factory tour and seminar
Superiority of bespoke secondary glazing
Bespoke secondary glazing provides a good alternative to double glazing. When acoustic or security benefits are required, secondary glazing generally provides superior benefits to specialist double glazing. Secondary glazing must be made to measure in order to achieve optimal benefits. A non-optimal fit will result in a loss in the integrity of the treatment. When a window opening presents challenges such as:- Splayed
- Non-true
- Irregular reveals
Secondary double glazed units set in bespoke timber grounds
Selectaglaze is the acknowledged specialist and market leader in the design, manufacture and installation of secondary window systems.
The Company’s policy of continuous product development has resulted in a range of units with applications ranging from significant noise reduction and thermal insulation to environmental controls and protection against bomb blast or sustained physical attack.
Having designed and produced units for specific uses, Selectaglaze ensures that wherever possible, they are independently tested and certified so that their clients may rely upon the quality and assurances of the products and the Company itself. It’s an approach to taking the business seriously that extends to issues of training and Health & Safety and has been recognised through independent organisations.