How much noise does secondary glazing reduce?

When installed with an optimal air gap of 100mm-200mm and acoustic laminate glass, secondary glazing can reduce external noise by up to 80% or approximately 54 decibels (dB).

Is secondary glazing better than double glazing for noise?

Yes. While double glazing is great for heat, its small air gap is ineffective against noise. Secondary glazing uses a much larger air gap and specialized glass to break sound waves more effectively.

Do I need planning permission for secondary glazing in a listed building?

Generally, no. Because secondary glazing is an internal, reversible alteration, it is typically approved for Grade II listed buildings and homes in conservation areas.

Secondary Glazing for Noise Reduction & Soundproofing

Is outside noise ruining the peace and quiet of your home? Whether it’s the constant drone of traffic, the screech of sirens, or the neighborhood noise that keeps you awake, your windows are almost always the weakest link in your home’s sound insulation. Standard double glazing often struggles with low-frequency sounds, but there is a more effective, specialized solution.

At EcoShield, our bespoke secondary glazing is engineered specifically to tackle noise pollution. By adding a discreet, high-performance internal window, we can reduce incoming noise by up to 80% (up to 54dB), transforming your living space into a quiet sanctuary.

H2: How Secondary Glazing Outperforms Double Glazing for Sound

Many homeowners are surprised to learn that secondary glazing is significantly more effective at soundproofing than standard replacement double glazing. The secret lies in the science of sound waves and “The Gap.”

1. The Power of the Acoustic Air Gap

Standard double-glazed units have a very small gap (usually 16mm to 20mm) between the panes. While this is great for heat, it does very little to stop sound vibrations. For effective noise reduction, you need a much larger “buffer zone.”

The EcoShield Advantage: We install our secondary units with an optimal air gap of 100mm to 200mm from your existing primary window. This large cavity acts as a massive dampener, breaking the energy of sound waves before they enter your room.

2. Specialized Acoustic Laminate Glass

Not all glass is created equal. Standard window glass vibrates at the same frequency as outside noise, allowing sound to pass through easily.

Our Solution: We utilize 6.4mm or 6.8mm Acoustic Laminate glass. This glass features a transparent PVB (Polyvinyl Butyral) interlayer that acts as a “noise-absorbing” core. It disrupts the sound’s path and prevents the glass from vibrating, specifically targeting high-decibel city noise and traffic.

3. Eliminating Draughts and “Airborne” Noise

Sound travels through air. If air can get in (via gaps in old sash windows or aging seals), so can noise. Our secondary glazing units are precision-engineered with high-performance seals to create an airtight barrier, effectively “sealing off” your home from the acoustic chaos outside.

H2: The Benefits of an EcoShield Acoustic Installation

Peace & Quiet: Enjoy a significant reduction in road traffic, rail, and aircraft noise.
Better Sleep: Create a calm environment in bedrooms to improve your quality of life.
Discreet Design: Our slimline aluminum frames are designed to blend in with your existing windows, making them perfect for Listed Buildings and period homes.
Zero Stress: No need to remove your original windows. We install the system internally with minimal mess and no structural changes required.

Don’t let outside noise dictate your quality of life. Our experts can assess your windows and provide a tailored soundproofing strategy for your home.

Book your free acoustic survey, contact us today

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