Secondary Glazing Systems

What is Secondary Glazing?

A fully independent frame fitted on the room side of an existing window to form a double window. The gap between the windows can vary but is normally greater when noise insulation is important. We use a Secondary Glazing System which has been tried and tested for over 40 years and is in use throughout the UK.

  • The windows are made from aluminium sections which are strong, durable and fully recyclable at the ‘end of life’.
  • A permanent finish is applied to the sections and hence no decoration is required and cleaning is very straightforward. The finish is normally white but almost any colour can be offered to suit your interior design.
  • A wide range of window styles allow the design to be as sympathetic as possible to the character of the building. For large windows the design may require a number of styles linked together with neat coupling sections. Each window is purpose made to provide the best fit.


We supply and install systems to retail, commercial, domestic and office environments.

Secondary glazing involves the installation of new, fully independent secondary window frames on the room side of the existing or primary window.

The key benefits offered by secondary windows include improved acoustic insulation protection against noise pollution from road traffic, aircraft and the 24 hour society. Secondary glazing systems also improve thermal insulation, saving energy and reducing fuel bills; increased window security by providing a protective barrier against intruders and blasts.

Secondary glazing systems are widely used within offices, homes, hotels, museums, healthcare premises, laboratories, clean rooms and public buildings. They are also uniquely suitable for listed and heritage buildings.

What are the benefits?

  • Conserve energy
    • Significantly Improve Thermal Insulation
    • Reduce Heat Loss
    • Exclude Draughts
    • Lower Energy Bills
    • Smaller Carbon Footprint
    • Higher rated Energy Performance Certificate (EPC)
  • Control noise
    • Highly effective Noise Insulation
    • Quieter Environment
    • Reduced sleep disturbance
    • Satisfy Noise Planning Constraints
  • Improve security
    • Provide an additional Security Barrier
    • Deters Intruders
    • Offers Protection Against Blast
    • Preserves Clean Environments
  • Retain the character of the building
    • Satisfies Heritage and Conservation Bodies
    • Discrete, Sympathetic Designs