All London Boroughs
    0207 060 1572
    Secondary Glazing Noise Reduction London specialist logo
    Our 5-Step Process

    How Secondary Glazing Works: From Survey to Silent Home

    From initial consultation to enjoying a peaceful home, discover how our secondary glazing solutions deliver up to 54dB noise reduction in suitable configurations. Warranty length depends on the selected specification: standard installations carry a 10-year warranty, while Premium and Heritage packages include a 25-year warranty.

    Our 5-Step Process

    Free Consultation

    Contact us for a no-obligation discussion about your noise problems and requirements.

    • Understand your specific noise issues
    • Discuss potential solutions
    • Answer any questions you have

    On-Site Survey

    Our specialist visits your property to assess windows and measure noise levels.

    • Detailed window assessment
    • Acoustic measurements taken
    • Personalised recommendations

    Custom Design

    We design bespoke secondary glazing units tailored to your windows and requirements.

    • Precision measurements
    • Glass specification selection
    • Frame style and finish options

    Professional Installation

    Our experienced installers fit your secondary glazing with minimal disruption.

    • Clean, efficient installation
    • Typically 1-2 days
    • Full testing and demonstration

    Enjoy the Quiet

    Experience immediate noise reduction of up to 54dB in suitable configurations and enjoy your peaceful home.

    • Instant results
    • 10-year standard / 25-year Premium & Heritage warranty
    • Ongoing support available

    The Science Behind Noise Reduction

    Secondary glazing doesn't just block noise—it uses proven acoustic principles to dramatically reduce sound transmission into your home.

    Sound Wave Interruption

    Secondary glazing creates a barrier that disrupts sound wave transmission, preventing noise from entering your home.

    Air Gap Principle

    The 100-150mm air gap between primary and secondary glazing is crucial for absorbing sound energy before it reaches your interior.

    Mass-Air-Mass Effect

    Two separate glass panels with an air cavity between them provide far superior acoustic insulation than a single thick pane.

    Want to learn more about the technical aspects?

    Read Our Technical Guide

    Proven Results

    54dB

    Noise Reduction*

    London

    Specialist Coverage

    10–25yr

    Warranty

    Ready to Get Started?

    Book your free consultation today and take the first step towards a quieter, more peaceful home.

    Call 0207 060 1572Request Free Quote

    What happens after the process

    Once you understand the survey-to-installation workflow, these specialist pages explain the technical decisions made at each step and the measurable results you can expect afterwards.

    Sources & References

    Authoritative sources supporting the information on this page.

    1. 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.

    2. 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.

    3. 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.

    4. 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.

    5. World Health Organization Regional Office for Europe (2018). Environmental Noise Guidelines for the European Region. World Health Organization.Open source

      Evidence-based guideline levels for road, rail and aircraft noise and their links to sleep disturbance and health.

    How secondary glazing works in practice

    A second window inside your existing one

    Secondary glazing is a slim, made-to-measure unit fitted on the room side of your existing window. The original window stays exactly as it is, which is why the approach is accepted in most conservation areas and listed buildings. The space between the two windows becomes a wide acoustic air gap, and that gap is what does most of the work against outside noise.

    Because every unit is made to measure, the first step is always a free survey. We measure each opening, check the reveal depth and condition, and listen to the noise in the rooms that bother you most.

    From survey to a quieter room

    After the survey you receive a clear per-window quote. Units are then manufactured to your exact sizes and fitted in a single visit in most cases, with no scaffolding and no mess outside. Opening styles include horizontal sliders for sash windows, vertical sliders, hinged panels and lift-out panels for windows you rarely open.

    Noise reduction of up to 54dB is achievable in suitable configurations; actual results depend on the existing window, the surrounding wall and the quality of installation.

    • Free survey and honest specification advice.
    • Made-to-measure manufacture for each opening.
    • Fitting usually completed in one visit per room.
    • Warranty up to 25 years on frames and seals.