Quieter

Superior acoustic insulation

Noise pollution isn’t just annoying – it’s a proven threat to health and wellbeing. Whether you're trying to meet planning requirements or simply create a more tranquil space, secondary glazing is the most effective and discreet solution. By decoupling the inner and outer panes with a deep air cavity, our systems break the path of sound transmission. Purpose-made frames and high-performance seals eliminate gaps that let noise in – even a 1% opening can reduce insulation by up to 10dB. We can’t advise on the exact dB reduction you’ll need, but we can recommend the right product to meet your acoustic goals and project brief – all in a discreet, sympathetic way that complements the building’s character.
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Understanding sound

Sound is measured in decibels (dB). A 10dB increase is perceived as twice as loud. Our ears are more sensitive to higher frequencies – like those from aircraft or sirens – which is why acoustic glazing is designed to target these ranges. Performance improves with:

• Cavity depth – larger gaps between panes reduce resonance
• Glass thickness – heavier glass blocks more sound
• Glass type – acoustic laminate glass targets high-frequency noise

Helping you meet regulations and standards

BS 8233:2014 This British Standard provides guidance on sound insulation and noise reduction in buildings – including new builds and refurbishments.
Our systems help meet these recommendations by significantly improving sound insulation. BB93:2015 Acoustic Design of Schools Building Bulletin 93 sets out performance standards for schools.
Secondary glazing can help meet these targets, creating quieter learning environments that support focus and wellbeing. Government Noise Guidance The Ministry of Housing, Communities & Local Government provides planning guidance on managing noise impacts. Secondary glazing is a recognised method for mitigating external noise in both residential and commercial developments. WHO Guidance The World Health Organisation (WHO) sets out guidelines for acceptable sound levels in a range of environments in ‘Guidelines for Community Noise’, some of which are set out in the table below along with secondary glazing performance comparisons.

Acoustic performance at a glance

Our systems have been tested to BS EN ISO 140-3:1995 standards by Taylor Woodrow Technology, with results reviewed by Hann Tucker Associates, with results reviewed and interpolated by acousticians Hann Tucker Associates. Performance is presented in a range of cavity depths – from 50mm to 200mm – to suit your acoustic needs. All figures are based on a 6mm single-glazed primary window and tested opening size of 1250mm x 1500mm. Rw dB values for a 50mm cavity between the secondary and primary glazing

Rw dB values for a 100mm cavity between the secondary and primary glazing

Rw dB values for a 150mm cavity between the secondary and primary glazing

Rw dB values for a 200mm cavity between the secondary and primary glazing