Secondary Glazing in W4: Chiswick Noise Reduction
Homes in Chiswick typically deal with Heathrow flight-path noise. 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 Hounslow / West London.
Noise profile
Aircraft flight paths — Heathrow flight-path noise.
Recommended spec
10.8mm acoustic laminate + 200mm cavity + edge sealing.
Expected result
35–42 dB reduction on jet approach noise.
W4 FAQs
How much noise reduction can I expect in W4?
Homes in Chiswick typically see 35–42 dB reduction on jet approach 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 Chiswick?
For the dominant noise here (Heathrow flight-path noise), we recommend 10.8mm acoustic laminate + 200mm cavity + edge sealing. 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 Hounslow / West London?
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 W4 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 Chiswick flat is usually £3,200–£6,500 fully installed.
Ready for a W4 survey?
Free acoustic survey, before/after dB measurement and a fixed quote inside a week.
Book my free W4 survey