Secondary Glazing in N5: Highbury Noise Reduction
Homes in Highbury typically deal with Holloway Road A1 traffic. We install acoustic secondary glazing tuned for exactly that frequency profile — with a free survey, before/after dB measurement, and full listed-building compliance across Islington.
Noise profile
Constant road traffic — Holloway Road A1 traffic.
Recommended spec
10.8mm acoustic laminated glass with 150mm cavity.
Expected result
38–45 dB reduction on low-frequency road noise.
Local pages for Highbury
Pricing and glass specification tuned to Highbury sash-window installs.
Street examples, measured dB data and pricing across Islington.
Deep dive on holloway road a1 traffic and the glass specs that solve it.
Free 2026 PDF handbook covering acoustic physics, glass specs and London pricing.
N5 FAQs
How much noise reduction can I expect in N5?
Homes in Highbury typically see 38–45 dB reduction on low-frequency road noise, depending on window size, façade condition and glass specification. We measure before and after with a calibrated sound-level meter as part of every install.
What glass specification is best for Highbury?
For the dominant noise here (Holloway Road A1 traffic), we recommend 10.8mm acoustic laminated glass with 150mm cavity. In listed buildings or conservation areas we use the same acoustic performance in a discreet slimline frame that satisfies planners.
Do I need planning permission in Islington?
Secondary glazing is internal work and is almost never controlled by planning permission — even in conservation areas. Grade II listed buildings need Listed Building Consent, which we handle with drawings and a heritage statement as part of the quote.
How much does a typical N5 install cost?
London prices in 2026 start at £450 per window for a small sash and rise to £1,600 for large Georgian sashes with premium acoustic glass. A three-bed Highbury flat is usually £3,200–£6,500 fully installed.
Ready for a N5 survey?
Free acoustic survey, before/after dB measurement and a fixed quote inside a week.
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