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

    • 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 Buildings
      Heritage Building Image 1

      Secondary glazing

      - Retaining and adapting heritage buildings

    • Gain 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
      In addition, Selectaglaze offers 2 further specialist CPDs covering
      • Window protection through secondary glazing systems
      • Factory tour and seminar
      Click here to book our CPD or to find out more details  
      Secondary glazing Selectaglaze Brochure Selectaglaze CPDs

    • 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
      The timber shop produces bespoke timber grounds to address these issues.  Attention to detail from start to finish results in secondary glazing treatments which provide maximum benefit(s).
      Irregular and splayed window openings 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.