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    Calculate the financial benefits of secondary glazing. See your estimated costs, payback period, and long-term savings.

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    Used to estimate potential property value increase

    Beyond Financial Returns

    • Improved Comfort

      Warmer in winter, cooler in summer, quieter all year

    • Better Sleep Quality

      Reduced noise leads to improved sleep and wellbeing

    • Enhanced Security

      Additional barrier against intruders

    • Preserved Original Features

      Maintain character of period properties

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    Sources & References

    Authoritative sources supporting the information on this page.

    1. Historic England (2016). Energy Efficiency and Historic Buildings: Secondary Glazing for Windows. Historic England.Open source

      Technical advice on choosing and installing secondary glazing in older and listed buildings.

    2. British Standards Institution (2014). Guidance on sound insulation and noise reduction for buildings (BS 8233:2014). BSI Standards.

      Sets the recommended internal noise levels for bedrooms and living rooms used to judge how much glazing performance a home needs.

    3. HM Government (2015). Approved Document E: Resistance to the passage of sound. The Building Regulations 2010.Open source

      The statutory guidance on sound insulation in dwellings in England.

    4. British Standards Institution (2020). Acoustics: Rating of sound insulation in buildings and of building elements, Part 1: Airborne sound insulation (BS EN ISO 717-1). BSI Standards.

      Defines the Rw and Rw+Ctr ratings used to compare the acoustic performance of glazing systems.

    5. British Standards Institution (2019). Glass in building: Glazing and airborne sound insulation (BS EN 12758). BSI Standards.

      Describes how the sound insulation of glass types, including acoustic laminates, is characterised.