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    Why London Homeowners Choose Us

    We are London's dedicated soundproof secondary glazing specialists — trusted by homeowners, architects, and conservation officers across every borough. Our flagship specification uses 10.8mm acoustic laminate glass (Stadip Silence) paired with precision-engineered aluminium frames that deliver up to 54dB noise reduction without altering your property's external appearance. As recognised listed building window specialists, we work within the strictest heritage constraints — from Grade II townhouses in Belgravia to Victorian terraces in Fulham — ensuring full compliance with conservation area requirements while transforming acoustic comfort. Every installation begins with a free on-site noise survey, bespoke measurement, and a transparent fixed-price quote. No subcontractors, no hidden costs, and a 10-year performance guarantee on every window.

    10-Year Guarantee

    Full parts & installation warranty on every project

    54dB Reduction

    Industry-leading acoustic performance

    Heritage Approved

    Listed building & conservation area compliant

    65% Heat Savings

    Dramatic thermal improvement for period homes

    Specialist Acoustic Secondary Glazing & Soundproof Window Inserts London

    Reclaim Your Peace with High-Performance Acoustic Glazing

    Living in London shouldn't mean living with the constant hum of traffic or the roar of the Heathrow flight path. We specialize in secondary glazing—a discrete, high-performance second window pane that sits inside your existing frame, creating an acoustic barrier that standard double glazing simply can't match.

    The Power of 10.8mm Stadip Silence Glass

    Our systems aren't just thick glass; they use 10.8mm Stadip Silence acoustic laminate. By combining this specialized glass with a 100mm–200mm air gap, we can achieve a noise reduction of up to 54dB. That is the difference between a busy main road and a quiet library.

    The key to effective noise reduction is the STC rating (Sound Transmission Class). Our acoustic secondary glazing achieves STC ratings of 50 and above — the gold standard for residential noise control. Independent laboratory testing confirms that our installations reduce noise from heavy traffic, aircraft engines, and urban nightlife to barely audible levels inside your home.

    How Our Acoustic Glazing Works

    The acoustic performance of any window system depends on three critical factors: the mass of the glass, the air gap between panes, and the quality of the edge seals. We optimise all three. Our 10.8mm Saint-Gobain Stadip Silence laminated glass provides exceptional mass-per-square-metre. The secondary panel creates an air gap of 100–150mm — the optimal range for low-frequency attenuation. And our compression seals ensure an airtight fit that prevents flanking noise from bypassing the glass entirely.

    This specialist PVB acoustic interlayer is tuned to dampen the frequencies most disruptive to human hearing — the low rumble of traffic, the bass from neighbouring properties, and the drone of aircraft engines overhead. The result is measurable, lasting silence that transforms your living space.

    Solutions for Sash Windows & Listed Buildings

    If you own a period home or a Grade II listed property, you know that replacing windows is often not an option. Our soundproof window inserts are slim, discrete, and planning-friendly. They offer a completely reversible way to soundproof Victorian and Georgian sash windows without losing their heritage character.

    Every installation is bespoke, measured to the millimetre, and designed to complement the character of your property — whether that's a Grade II listed Georgian townhouse in Belgravia, a Victorian terrace in Clapham, or a modern riverside apartment in Canary Wharf. Our secondary glazing panels are approved by conservation officers across London boroughs including Westminster, Camden, Kensington & Chelsea, and Richmond.

    Where We Work

    We provide expert soundproof window installation across London. Explore our local guides for specialized advice in your area:

    Noise Comparison

    See the Difference

    Our 10.8mm acoustic laminated glass reduces even the most extreme noise sources to a whisper-quiet 30dB.

    Jet Engine
    120 dB→ 30 dB
    Heavy Traffic
    85 dB→ 30 dB
    Conversation
    60 dB→ 30 dB
    30 dB — Whisper quiet. Softer than a library.

    Noise Solutions

    Your Noise Problem, Solved

    Standard double glazing was never designed to block noise — it was designed to keep heat in. That's why your 2015-era uPVC windows still let in every motorcycle, siren, and fox scream.

    Engineering

    Inside Our Glazing System

    Hover over each layer to understand the acoustic engineering behind every installation.

    10.8mm Acoustic Laminated Glass
    Specialist Sound-Dampening Seals
    150mm Acoustic Air Gap
    Specialist Sound-Dampening Seals
    Your Existing Window
    Outside ↓
    Inside ↑

    Hover over any layer in the cross-section to see its acoustic specification and purpose.

    Rw 60

    System Performance

    150mm

    Air Gap Depth

    95%+

    Noise Reduction

    Engineering

    Technical Specifications

    Every component is specified for maximum acoustic performance — no compromises.

    50+

    STC Ratings

    Our acoustic secondary glazing achieves Sound Transmission Class ratings of 50 and above — the gold standard for residential noise control.

    54dB

    54dB Noise Reduction

    Independent laboratory testing confirms up to 54dB of noise reduction, turning heavy traffic into a barely audible whisper.

    10.8mm

    10.8mm Stadip Silence Glass

    We use Saint-Gobain Stadip Silence laminated glass with a specialist PVB acoustic interlayer, tuned to dampen the frequencies most disruptive to human hearing.

    10-Year Guarantee

    Which? Trusted Trader

    25+ Years Experience

    4.9/5 Rating

    FENSA Registered

    TrustMark Approved

    Why Trust Our Expertise

    Certified acoustic engineers delivering scientifically-proven soundproofing solutions

    25+ Years Experience

    Certified acoustic engineers with over two decades of noise reduction expertise

    Industry Certified

    FENSA registered, CE marked products, and Building Regulations compliant installations

    Proven Results

    10,000+ successful installations with documented STC ratings and noise reduction measurements

    Expert Team

    BSc Acoustics qualified specialists and ISVR (Institute of Sound and Vibration Research) trained

    Certified & Trusted

    FENSA RegisteredCE MarkedBuilding Regs CompliantTrustMark ApprovedWhich? Trusted Trader

    The Science

    The Science of Silence

    10.8mm laminated acoustic glass cross-section showing PVB layer blocking sound waves

    Why 10.8mm Glass Changes Everything

    Sound is measured in decibels (dB). A normal conversation is around 60dB. Heavy traffic? 85dB. A jet from Heathrow? 120dB. The key number is STC (Sound Transmission Class) — the rating that tells you how much noise a window actually blocks.

    Standard single-pane windows have an STC rating of around 27. Your typical double-glazed window? About 28–32 STC. Still not enough to stop a diesel engine idling outside your bedroom.

    10.8mm acoustic laminated glass achieves an STC rating of 50+. That's a reduction of up to 50 decibels — reducing the roar of heavy traffic to the sound of a whisper.

    The secret is in the construction. Our acoustic glass uses a polyvinyl butyral (PVB) interlayer sandwiched between two sheets of glass, specifically tuned to absorb frequencies in the 1000–3000 Hz range — the exact range where human hearing is most sensitive. When sound waves hit the glass, the PVB layer flexes and dissipates the energy.

    The 100–150mm Air Gap

    But the glass is only half the battle. The real magic happens in the space between your existing window and the new secondary glazing unit.

    When you install secondary glazing, you're creating a 100mm–150mm air cavity — a sound buffer zone. This air gap acts as a "decoupler," meaning sound waves lose energy as they travel through different densities (glass → air → glass). The wider the gap, the more low-frequency noise gets trapped and neutralised.

    Think of it like this: if your existing window is a single defensive wall, secondary glazing adds a moat, a second wall, and a drawbridge. Sound has to work much harder to reach you.

    This is why secondary glazing outperforms triple glazing for noise reduction. Triple glazing has three panes crammed into a 40mm frame — too close together for effective decoupling. Secondary glazing uses your existing window plus a completely separate unit, creating that crucial 100mm+ buffer.

    Your Existing Window

    4mm–6mm float or double glazed

    100–150mm Acoustic Air Cavity

    The "decoupling zone" — sound waves lose energy across this buffer, especially at low frequencies

    10.8mm Acoustic Laminate

    6.4mm + PVB interlayer + 4.4mm

    50+

    STC Rating

    95%

    Noise Reduced

    150mm

    Air Gap

    Why Choose Us

    Best Windows for Noise Reduction

    54dB Noise Reduction

    Laboratory-tested acoustic performance that turns busy roads into near-silence

    Heat Retention

    Secondary glazing creates an insulating air gap that cuts energy bills year-round

    Listed Building Approved

    Conservation-officer approved across Westminster, Camden, Kensington & Chelsea

    Discrete Design

    Slimline profiles sit flush inside the reveal — virtually invisible from the street

    Free

    Get a Free Quote

    Tell us about your windows and we'll do the rest — no pressure, no jargon.

    Limited Time: Free Consultation + 10% Off (Ends Soon!)

    No obligation 100% secure 24hr response

    🔥 Join 500+ happy customers this month

    Our Work

    See our professional soundproof window installations across homes and offices in the UK

    Sash bay window with secondary glazing and black blinds for noise reduction in living room

    Sash Bay Window Installation

    Hinged secondary glazing windows in empty room with radiator showing professional installation

    Hinged Secondary Glazing

    Office corridor with multiple soundproof windows providing noise reduction in commercial space

    Office Acoustic Windows

    Horizontal secondary glazing in luxury room with chandelier and beige decor

    Horizontal Secondary Glazing

    Living room with three soundproof windows featuring grey blinds and dining furniture

    Living Room Windows

    Secondary glazing window overlooking busy road with traffic for noise reduction

    Traffic Noise Solution

    Combination of secondary glazing on windows and patio doors in room with wooden floor

    Windows & Doors

    Door secondary glazing installation in corner room with multiple windows

    Door Glazing

    Lift out secondary glazing window showing modern slim frame design

    Lift-Out Design

    Best secondary glazing with frosted glass in bathroom for privacy and noise reduction

    Frosted Glass Option

    Modern patio doors with secondary glazing in bright room overlooking garden

    Patio Door Glazing

    Rustic cottage window with secondary glazing featuring traditional grid design and wooden sill

    Traditional Style

    Join hundreds of satisfied customers who have transformed their homes with our soundproof windows

    Request Your Free Quote
    Customer Reviews

    Soundproof Window Reviews

    4.9/5 from 500+ customers
    ✓ Verified

    Life-changing for our apartment

    "The soundproof window inserts completely eliminated the traffic noise from the highway. We can finally sleep peacefully! Installation was quick and the difference is incredible. Worth every penny."

    - Sarah Mitchell, London

    5 Jan 2026

    ✓ Verified

    Best investment we made

    "Living near the airport was unbearable until we installed triple pane acoustic windows. The difference is incredible! We can now enjoy our home without constant airplane noise disrupting our peace."

    - John Davies, Manchester

    28 Dec 2024

    ✓ Verified

    Professional and effective

    "The installation team was professional and the laminated glass windows work perfectly. No more neighbor noise! The consultation was thorough and they matched our exact needs. Highly recommend their service."

    - Maria Rodriguez, Birmingham

    15 Dec 2024

    Our Guarantee to You

    Your satisfaction and peace of mind are our top priorities

    Certified SGS installer working on soundproof window installationProfessional SGS installers team installing acoustic windows

    Lifetime Warranty

    All our soundproof windows come with comprehensive lifetime warranty coverage

    Money-Back Guarantee

    30-day satisfaction guarantee or your money back, no questions asked

    Same-Day Response

    Get your free quote within 24 hours and professional installation scheduled

    Certified Installers

    Licensed, insured, and certified acoustic window installation professionals

    Expert Resources

    Learn Everything About Soundproof Windows

    Comprehensive guides to help you choose the perfect acoustic solution for your home or office

    FAQ

    Frequently Asked Questions

    Find Out Exactly What It Will Cost

    Every property is different. The number of windows, the type of noise, your existing frames — all of these affect the final specification and price.

    Use our free noise reduction calculator for an instant estimate based on 2026 pricing. Or request a free noise survey — we'll visit your property, measure decibel levels, and design a bespoke acoustic solution.

    Because you shouldn't have to choose between living in London and getting a good night's sleep.

    Soundproof My Window is part of the Secondary Glazing Specialist group. All installations come with a 10-year guarantee and are carried out by FENSA-registered installers.

    Professional Soundproof Windows: The Complete Guide

    Everything you need to know about choosing the best soundproof windows for your home

    How Soundproof Windows Work

    Soundproof windows use advanced acoustic engineering to block unwanted noise. Our laminated glass windows feature multiple layers of glass with special acoustic interlayers that dampen sound waves before they enter your home.

    The key to effective noise reduction is the STC rating (Sound Transmission Class). Our windows range from STC 38 for basic noise reduction to STC 55+ for maximum sound blocking, perfect for homes near highways, airports, or busy urban areas.

    Types of Soundproof Windows

    • Double Pane Soundproof Windows: Ideal for reducing traffic noise, offering STC ratings of 38-42
    • Triple Pane Acoustic Windows: Best for airplane noise and severe sound pollution, with STC 50+
    • Window Inserts: Affordable DIY soundproof windows that install over existing windows
    • Secondary Glazing: Cost-effective solution for apartments and rental properties

    Read our complete soundproof windows guide to learn more about choosing the right solution for your needs.

    Elegant bay window with acoustic glazing and green outdoor view showing professional soundproof window installationBay window with soundproof secondary glazing showing effective noise reduction solution

    Benefits Beyond Noise Reduction

    While noise cancellation is the primary benefit, our soundproof windows offer additional advantages:

    • Improved energy efficiency and lower utility bills
    • Enhanced home security with laminated glass construction
    • UV protection to prevent furniture fading
    • Increased property value and curb appeal

    Finding Soundproof Windows Near You

    We work with certified acoustic window installation contractors across the United Kingdom. Our network of professional installers ensures proper installation for maximum noise reduction performance.

    Whether you need soundproof windows for traffic noise in London, airplane noise near airports, or neighborhood noise in apartment buildings, our experts can help. We offer free in-home consultations and detailed acoustic assessments.

    Looking for specific solutions? Explore our guides on bedroom soundproofing windows and office acoustic windows for tailored advice.

    Bathroom window with frosted acoustic secondary glazing for privacy and noise reductionBedroom window with soundproof secondary glazing and yellow curtains for peaceful sleep

    Soundproof Your Home Today

    Don't let noise pollution affect your quality of life. Our soundproof window solutions have helped thousands of homeowners enjoy peaceful, quiet homes. From DIY soundproof window kits to professional acoustic glazing installation, we have the perfect solution for your noise reduction needs.

    Local Soundproofing Guides

    Neighbourhood-specific advice on acoustic glazing, planning regulations, and noise levels.